Abstract:
The invention relates to a transcoding system comprising an application platform and a transcoding platform for executing transcoding transactions that comprise the transmission of a request from the application platform to the transcoding platform, the execution of said request by said transcoding platform, and the transmission of a response to said application platform, said request and response having specific formats given in detailed tables. Moreover, the request has a transcoding parameter element comprising a transformation element that defines a transformation through which a content must go, amongst a plurality of supported transformations also defined in a detailed table.

Description:
FIELD OF THE INVENTION  
       [0001]     The present invention relates to a transcoding system comprising an application platform and a transcoding platform for executing transcoding transactions that comprise the following steps: 
    transmission of a request from said application platform to said transcoding platform,     execution of said request by said transcoding platform,     transmission of a response from said transcoding platform to said application platform.    
 
         [0005]     In the present description, the word “platform” refers to a combination of hardware and software that provides the functionality of the concerned applications.  
       BACKGROUND OF THE INVENTION  
       [0006]     The deployment of multimedia applications like MMS Multimedia Messaging Service), WAP 2 (Wireless Application Protocol), e-mail, web browsing . . . etc.) may require some Content adaptations, due to the diversity of the phone specifications (memory, screen size, resolution, colour depth, etc, and supported media formats) and of the media formats as distributed by the Content industry (JPEG, GIF, all AMR modes, 13K vocoder, EVRC, SMV, MPEG-1, MPEG-4, H.263 . . . etc.). The word “Content” used here means any subject matter or information that is processed, stored or transmitted electronically. Content Adaptation is largely independent on the type of service that delivers the data to the end users. In this context, STI 1.0 is the first specification of a standard interface between the Multimedia Application Platforms and the Transcoding Platform and is meant to resolve some of the integration and testing problems when deploying multimedia services towards mobile devices.  
       SUMMARY OF THE INVENTION  
       [0007]     The object of the invention is to propose a new solution for the standard interface, to be used by OMA STI 1.0. (OMA=Open Mobile Alliance).  
         [0008]     To this end, the invention relates to a transcoding system such as defined in the introductory paragraph of the description and in which said request is based on a request body which is structured as indicated in Table 1, and said response, when successful, is based on a response body which is structured as indicated in Table 3.  
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0009]     The present invention will now be described, by way of example, with reference to the accompanying drawings in which:  
         [0010]      FIG. 1  illustrates a transcoding transaction;  
         [0011]      FIG. 2  shows an overview of the request components for such a transaction;  
         [0012]      FIG. 3  presents the transcoding job structure, including the source parameters and the target parameters,  
         [0013]      FIG. 4  presents the response transaction structure, and  
         [0014]      FIG. 5  presents the job result structure;  
         [0015]      FIG. 6  is an example of combined media format;  
         [0016]      FIG. 7  shows the structure of a request transaction, and  
         [0017]      FIG. 8  the structure of a response transaction. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0018]     A high level overview of the interaction between an Application Platform  10  and a Transcoding Platform  20  is illustrated in  FIG. 1 . The communication between the Platforms is transactional, that is a transcoding session is always a request  30  followed by a response  40 . A session is closed only when a response has been received. The Application Platform requests transcoding from the Transcoding Platform. The Transcoding Platform receives the request, parses it, handles it and generates a response to the originating Application Platform.  
         [0019]     The choice of the protocol is done as follows. The interface between Application Platform and the Transcoding Platform relies on a SOAP protocol (SOAP v 1.1, http://www.w3.org/TR/SOAP/), sent over HTTP (HyperText Transfer Protocol) and used over TCP/IP (Transmission Control Protocol/Internet Protocol).  
         [0020]      FIG. 2  shows an overview of the request components. Multiple bulk transcoding within a single Request Transaction (=transcoding request, as issued by the Application Platform; it can contain one or more Transcoding Jobs 1 to N and one or more Content Attachments 1 to M, a Transcoding Job being the part of the Request Transaction that corresponds to one individual transcoding, i.e. one input content reference and the parameters corresponding to the particular transcoding as given by the Application Platform) is allowed by the proposed interface: therefore one will distinguish between Transcoding Job (individual media transcoding) and Request Body (list of Job results) which can contain one or several Jobs as part of one single request to the Transcoding Platform. For each single Transcoding Job within a Request body, the transcoding parameters are specified within the SOAP context. In case a Transcoding Job contains the Content files themselves, they are attached inside the concerned message, but outside the SOAP envelope. Each Transcoding Job in a Request Body has to contain the source parameters (format, type, location, etc) and the target parameters (profile ID, transcoding parameters, location, policy ID, policy parameters, etc), as presented in  FIG. 3 . The proposed Request Transaction structure supports all the Content types within the scope of STI 1.0: images, audio, speech, video, text, presentation formats and combined media . . . etc.  
         [0021]     The Response transaction (response of the Transcoding Platform to the Request Transaction) contains the Job Results (the Transcoding Jobs&#39; results 1, 2, . . . , N), as presented in  FIG. 4 . In this Response Body, parameters (duration, return code, etc) either concern the whole Transaction or the individual Transcoding Jobs&#39; results. For example, the duration corresponds to the complete Transaction duration. Still, in the job Results, there might also be some parameters describing the particular transcoding that was performed (i.e. image  1  was transcoded from GIF—Graphic Interchange Format—to JPEG—Joint Photographic Experts Group). The proposed interface supports reporting of statistical data gathered during the transcoding at the Job and Transaction levels. The Job Results contained in the Transaction are detailed in  FIG. 5 . The Source block of each Transcoding Job may specify the source type, format and parameters. The Target block of each Transaction Job has to specify the desired transcoding parameters and can specify Policy parameters.  
         [0022]     The proposed interface also supports transcoding of combined media Content, i.e a set of media elements can be transcoded as a whole. In this case, it is expected that the Transcoding Platform receives a combined media file, performs combined transcoding of the difference media elements (including any logical decisions between the different media elements) and recombines these elements into one transcoded combined media file as a response. The combined-media is transferred as a MIME-Multipart content item (MIME Part 1 (2, 3, . . . ): see http://www.ietf.org/rfc/rfc2045(to2049).txt). The MIME type is either multipart/related (in case a presentation exists) or multipart/mixed (in case a presentation does not exist). In the first case, the start parameter refers to the presentation part.  FIG. 6  illustrates the structure of a combined media (with a presentation part). The encoding of the MIME-Multipart (both input and output) is either textual, as defined in [MIME], or WAP binary encoding, as defined in [WAPWSP] (“Wireless Application Protocol, Wireless Session Protocol Specification”, WAP-203-WSP-20000504-a, WAP Forum™. URL [Uniform Resource Locator]=http://www.openmobilealliance.org). The requested encoding for the target MIME-Multipart is specified in the transcoding parameters of the Transcoding Job. The Content data (either combined media or individual media parts) is referenced from within the SOAP Request Body (and Response Body), and resides either on a storage that can be accessed by the Transcoding Platform or attached as part of the Transaction itself. The proposed interface provides two methods of supporting media attachments:  
         [0023]     self contained requests, in which the content data reside within the Transaction itself;  
         [0024]     references to external Content elements, in which case the Transaction only contains a pointer to a remote location from where the Content elements can be pulled by the Transcoding Platform.  
         [0025]     Each of the methods will be described below (note that the two options can be combined within one Transaction containing references (URLs) to external Content elements and attached Content elements). In the case references to external Content elements are used, the SOAP Request/Response Body contains the URLs, pointing to the relevant files, and the Application Platform and the Transcoding Platform have access to a shared persistent storage device, either “local” or accessible via HTTP or FTP (File Transfer Protocol). In case of self-contained requests, the SOAP Request/Response Body contains references to the attachments sent along with the Transaction, as MIME parts. Each content attachment is identified by its MIME Content ID. The SOAP Request/Response Body refers to the content, using the Content IDs.  
         [0026]     The transcoding parameters are the parameters that determine the target the Transcoding platform has to create. To specify the transcoding parameters, the Application Platform uses predefined Profiles and/or explicit transcoding parameters (note that in all cases, the Transcoding Platform can complement the list of parameters, but one of the Transcoding Platform parameters overrides the parameters that the Application Platform indicated in the Request Transaction). The transcoding parameters can be indicated using a reference to a pre-defined Profile (a profile is a set of parameters and constraints that define the transcoding target). One common use of a Profile is to describe the user Equipment (=a device allowing a user access to network services) characteristics. The profile reference can then be a reference to the database that both the Transcoding and Application Platforms share. In order to use a predefined profile, the Request Transaction specifies the Profile ID of the profile to be used (the definition of a profile and its content are out of the scope of the present description). The transcoding parameters can also be indicated using an explicit list of parameters, which will reflect the characteristics of the target device and/or the specific requirements from the Application. When a Profile ID is indicated and explicit parameters are added, the explicit parameters override the corresponding parameters in the referenced Profile.  
         [0027]     Policy parameters are a mean for the Application Platform to specify general rules (general limitations and preferences) for the Request Transaction (i.e. priority order between the different media elements, . . . ). To specify the Policy parameters, the Application Platform uses predefined Policy and/or explicit Policy parameters. When a PolicyID is indicated and explicit policy parameters are added, the explicit parameters override the corresponding parameters in the referenced Policy.  
         [0028]     The request transaction will now be explained in detail. As mentioned above, the Request Transactions contain a SOAP header, made of Transcoding Jobs, and can contain one or several Content attachments (if some Content elements are contained in the Transaction itself). All Content elements to be transcoded are referenced in the Transcoding Jobs (pointing to an attachment or an external source). The Request Transaction contains at least one Transcoding Job, and it can contain several Transcoding Jobs.  FIG. 7  shows the structure of a Request Transaction. Request Transactions that do no contain attachments (all the files are referenced using a URLs pointing to external sources) have a SOAP header and a SOAP-based Request Body. The SOAP header specifies the originating host, the length, the request encoding and the SOAP action. Request Transactions with Content attachments contain the SOAP header and a string that will indicate the boundary between each content attachment, as defined in MIME (see [MIME]). Each Content attachment contains its own header (using MIME). Each Content Attachment header contains its unique ID, its type, its encoding and its length.  
         [0029]     According to the invention, the SOAP-based Request Body is structured as indicated in the following Table 1 (in which the structures are written in bold):  
                                   TABLE 1                                       Mandatory/           parent   Name   Type   Possible Values   Optional   Comments                         Transaction             Mandatory   Several Transcoding Jobs                           can be sent within one                           request.       Transaction   TransactionID   Integer       Mandatory   A unique ID that is given by                           the Application Platform.       Transaction   NumTranscodingJobs   Integer       Optional   How many Transcoding                           Jobs reside in this                           Transaction.       Transaction   Priority   Integer   0-2   Optional   The priority of the                           Transaction (0 is the                           highest, default is 1)                           compared to others.       Transaction   ProfileID   String       Optional   The pre-defined Profile to be                           used for all the Transcoding                           Jobs within this Transaction.       Transaction     TranscodingParams             Optional   The transcoding parameters                           to be used for all the                           Transcoding Jobs within                           this Transaction. When a                           predefined Profile is                           specified and this tag                           appears, the values specified                           within this tag override the                           ones in the Profile.       Transaction   PolicyID   String       Optional   The pre-defined policy to be                           used for the Transaction.       Transaction     PolicyParams             Optional   The policy rules to be used                           for this Transaction. When a                           predefined Policy is                           specified and this tag                           appears, the values specified                           within this tag override the                           ones in the Policy.       Transaction     TranscodingJob             Mandatory   Each individual transcoding                       (1 or more)   request.       TranscodingJob     Source             Mandatory   The source for the                           Transcoding Job.       TranscodingJob     Target             Mandatory   The Target of this                           Transcoding Job.       Source   Type   String   “Combined”,   Optional   The type of the Source.                   “Audio”,                   “Image”,                   “Video”,                   “Text”,                   “SyntheticAudio”       Source   Format   String   According to the   Optional   The format of the Source.                   supported formats       Source   Codec   String   According to the   Optional   The codec of the Source.                   supported codecs       Source   Location   String   URL   Mandatory   The full-path on a shared                           storage or the Content ID of                           the attachment       Source   URLSettingsID   String       Optional   If any specific settings                           (headers, passwords, etc.)                           should be used, in order to                           access the Source URL, then                           the Application Platform                           SHALL specify a reference                           to such a set of predefined                           settings through this                           parameter.                           The definition of the set of                           available settings is out of                           the scope of this specification       Target   ProfileID   String       Optional   A predefined Profile to use                           for the Transcoding Job.                           When a ProfileID is defined                           at the Transaction level and                           this tag is present at the                           Transcoding Job level, the                           ProfileID at the Transcoding                           Job level overrides the one                           at the Transaction level.       Target     TranscodingParams             Optional   The transcoding parameters                           to be used for all the                           Transcoding Jobs within                           this Transaction. When a                           predefined Profile is                           specified and this tag                           appears, the values specified                           within this tag override the                           ones in the Profile. When                           TranscodingParams are                           defined at the Transaction                           level and this tag is present                           at the Transcoding Job level,                           the TranscodingParams at                           the Transcoding Job level                           override the ones at the                           Transaction level.       Target   Location   String   URL   Mandatory   The full-path on a shared                           storage or the Content ID of                           the attachment.       Target   URLSettingsID   String       Optional   If any specific settings                           (headers, passwords, etc.)                           should be used, in order to                           access the Target URL, then                           the Application Platform                           SHALL specify a reference                           to such a set of predefined                           settings through this                           parameter.                           The definition of the set of                           available settings is out of                           the scope of this                           specification.       PolicyParams     DeleteOrder             Optional   Ordered list of media types                           to be deleted if necessary.       PolicyParams     CompressOrder             Optional   Ordered list of media types to                           compressed if necessary       DeleteOrder   MediaType   String   “Audio”,   Optional (1   Media types in order of                   “Image”,   or more)   deletion.                   “Video”,                   “Text”,                   “SyntheticAudio”,                   “Combined”       CompressOrder   MediaType   String   “Audio”,   Optional (1   Media types in order for                   “Image”,   or more)   compression.                   “Video”,                   “Text”,                   “SyntheticAudio”,                   “Combined”       TranscodingParams   SizeLimit   Integer       Optional   The limit of the file sizes for                           the Transaction or the                           TranscodingJob. Default is                           unlimited (−1)       TranscodingParams     Audio             Optional   The audio transcoding                           parameters.       TranscodingParams     Image             Optional   The image transcoding                           parameters (also graphics).       TranscodingParams     Video             optional   The video transcoding                           parameters.       TranscodingParams     Text             Optional   The text transcoding                           parameters.       TranscodingParams     CombinedMedia             Optional   The combined-media                           transcoding parameters.       TranscodingParams     Transformation             Optional (0   transformation that the                       or more   content should go through                       appearances)       Transformation   Type   String   According to the   Optional   Type of transformation                   supported                   Transformations       Transformation   parameter   String   According to the   Optional   Value of parameter for this                   Supported       Transformation                   parameter values                   for the specific                   transformation       Audio   Format   String   According to the   Optional   The file-format of the target.                   supported audio       Any supported audio                   formats       Audio   Codec   String   According to the   Optional   The desired codec.                   supported audio       Restricted by the file format                   codecs       Audio   BitRate   Integer       Optional   The desired bit-rate.                           Restricted by the codec       Audio   SamplingRate   Integer       Optional   The desired sampling rate.                           Restricted by the codec       Audio   SamplingResolution   Integer   Optional       The desired sampling                           resolution. Restricted by the                           codec       Audio     Synthetic             Optional   Synthetic audio related                           parameters.       Synthetic   ChannelToUse   Integer       Optional   Number of input channel to                           be used in case the output                           contains only one channel.       Synthetic   ChannelsPriority   String       Optional   A comma separated                           permutation of 0-15. The                           priority of the channels, from                           the most important to the                           least important.                           Default is 0-15.       Synthetic   Instrument   Integer       Optional   The instrument to use, when                           transcoding to midi.                           Irrelevant for other formats,                           default is piano       Audio   SizeLimit   Integer       Optional   The limit of the file size for                           an audio. Default is                           unimited (−1)       Image   Format   String   According to the   Optional   The format of the target.                   supported image       Any supported image                   formats       Image   ColorScheme   String   “True24Bit”,   Optional   The desired color scheme                   “True12Bit”,                   “Palette256Co”,                   “Palette256Gr”,                   “Palette32Co”,                   “Palette32Gr”,                   “Palette16Co”,                   “Palette16Gr”,                   “Palette4Co”,                   “Palette4Gr”,                   “1Bit”       Image   Width   Integer       Optional   The target width.                           The default is the original                           width.       Image   Height   Integer       Optional   The target height.                           The default is the original heig       Image   Resize   String   “AspectRatio”,   Optional   Maintain the aspect ratio           Policy       “Crop”, “None”       when resizing (the new                           dimensions are set to fit into                           the desired width while                           aspect ratio is maintained),                           crop when shrinking (do not                           scale the image - take its                           central rectangle), or just                           stretch.       Image   SizeLimit   Integer       Optional   Size limit for the image.                           Default is unlimited (−1)       Video   Format   String   According to the   Optional   The format of the target.                   supported video       Any supported video                   formats       Video   Codec   String   According to the   Optional   The video codec of the                   supported video       target.                   codecs       Video   Width   Integer       Optional   Target width       Video   Height   Integer       Optional   Target height       Video   FrameRate   Integer       Optional   The wanted target frame rate       Video   BitRate   Integer       Optional   The desired target bit rate       Video     Audio             Optional   Audio parameters.       Video   SizeLimit   Integer       Optional   Size limit for the Audio.                           Default is unlimited (−1)       CombinedMedia   SizeLimit   Integer       Optional   Size limit for the whole                           combined media.                           Default is unlimited (−1)       CombinedMedia     PresentationParams             Optional   Parameters for the target                           presentation.       PresentationParams   Format   String   “SMIL”,   Optional   Target presentation format                   “HTML”, “None”       PresentationParams   Template   String       Optional   Template for presentation to                           be used in case of                           presentation format change.                           This is either a URL, or a                           content ID of the attachment       PresentationParams   Layout   String   “Portrait”,   Optional   Target layout.                   “Landscape”       Default is the source layout.       CombinedMedia   Encoding   String   “Textual”,   Optional   The encoding of the output                   “WAP”       MIME-Multipart.                           Default is textual.       CombinedMedia     TranscodingParams             Optional   Transcoding Parameters for                           media-elements inside the                           combined-media (more than                           one media type may be                           specifled here). The                           Parameters are specified for                           all the content-elements of                           the same type.                           For example, in order to                           transcode a video to a                           combined-media (e.g.                           image/s + audio + presentation),                           the target Parameters for                           the audio, image, and                           presentation are specified                           here.       CombinedMedia     OverallParams             Optional   Limitations on media                           parameters in the combined-                           media.       OverallParams   Width   Integer       Optional   Target width       OverallParams   Height   Integer       Optional   Target height       OverallParams   BitsPerPixel   Integer       Optional   Supported Number of bits                           per pixel       OverallParams   AllowColor   Boolean       Optional   Indication whether color                           images are allowed as an                           output.       OverallParams   MaxImageWidth   Integer       Optional   Maximum width                           allowed for                           image.       OverallParams   MaxImageHeight   Integer       Optional   Maximum height                           allowed for                           an image.       OverallParams   AllowImage   Boolean       Optional   Indication whether                           output                           can contain image.       OverallParams   AllowAudio   Boolean       Optional   Indication whether                           output                           can contain audio.       OverallParams   AllowVideo   Boolean       Optional   Indication whether                           output can contain video       OverallParams     SupportedContentTypes             Optional   A list of the supported                           content types.       SupportedContentTypes   Type   String       Optional   A single content type                       1 or more)                  
 
         [0030]     In order to perform transformations on the media, the Application Platform specifies, for each requested transformation, the type of the transformation and the parameter for the transformation. The following Table 2 lists the minimal set of supported transformations, the allowed parameter values for these transformations, and the type (or types) of media elements on which these transformations may be used. STI supports other proprietary Transformations that will then have to be defined between the Application Platform and the Transcoding Platform. If the Transcoding Platform does not recognize the Transformation type, it returns an error.  
                           TABLE 2                       Transformation                   Type   Possible parameter values   Media Types   Description                   LevelCorrection   No parameter   Image   Perform level correction.       Mirror   “UD”, “LR,   Image   “UD” - vertical mirror, “LR” -           “Diagonal”,       horizontal mirror. Default is           “None”       “None”.       NoiseReduction   No parameter   Image   Perform noise reduction.       Rotation   Angle of clockwise   Image   Perform Image rotation           rotation (0-359)       Sharpen   No parameter   Image   Perform image sharpening.       DurationLimit   Limit on duration (in   Video, Audio,   Truncate the media if its duration           milliseconds)   CombinedMedia (e.g.   exceeds this limit.               for slideshow)       AGC   No parameter   Audio   Perform Automatic Gain Control       Offset   Offset in source media   Audio, Video   the source image to start the           (in       Transcoding from.           milliseconds)       AudioChannels   “Mono”, “Stereo”,   Audio   Change the number of channels           “DualMono”,       in the output.           “IntensityStereo”       FrameRateSample   New frame rate   Image (e.g. for   Change the frame sampling rate               slideshow)   (without changing the speed and                   the duration of the media)       FrameRateOutput   New frame rate   Image (e.g. for   Change the frame rate in the               slideshow)   output (and thus change also                   the speed and the duration of                   the media).       NumberOfFrames   New number of frames   Image (e.g. for   Change the number of frames in               slideshow)   the output.                  
 
         [0031]     A request Transaction is considered as successful unless there was an error during the handling of the transaction that prevented the completion of the whole Transaction. Errors in specific Transcoding Jobs do not affect the success value of the entire Request Transaction. That is, a Request Transaction may be successful even though some (or all) of the Transcoding Jobs failed. The structure of a successful Response Transaction, containing the results of one or more Transcoding Jobs, is quite similar to the Request Transaction, i.e. a SOAP header, including a success code, and one or more Job Results and optionally the Content attachments. The Response Body contains references to either external content element or self-contained content elements. The same differences between a Transaction with contained content elements and without contained content elements, as discussed in the Request Transaction, apply for Response Transactions.  FIG. 8  shows the structure of the Response Transaction. As for the Request Body, a table indicates (Table 3) how the Response Body is structured:  
                               TABLE 3                       Parent   Name   Type   Possible values   Comments                       Transaction           The response       Transaction   ReturnCode   Integer       The return code of the                       Transaction (either a                       successful or a warning)       Transaction   NumJobResults   Integer       How many Job Results                       residue in this response.       Transaction   ProfileID   String       The Profile ID that was                       used for this transaction                       (in case it was specified                       in the Transaction block                       of the request)       Transaction   PolicyID   String       The Policy ID that was                       used for this transaction                       (in case it was specified                       in the Transaction block                       of the request)       Transaction   TransactionID   Integer       The unique ID that was                       received from the                       Application Platform in                       the request       Transaction   ContextID   Integer       A unique ID of the                       transcoding session                       that is given by the                       Transcoding Platform.       Transaction   TotalDuration   Integer       The time it took the                       Transcoding Platform to                       perform the entire                       transcoding Transaction                       in milliseconds. This                       number is the duration                       of the whole transaction                       from the time it reached                       the Transcoding                       Platform to the time the                       response was sent (it                       can be higher or lower                       the sum of durations for                       all the Job Results).       Transaction   JobResult           The Job Results. May                       be more than one (one                       per each Transcoding Job)       JobResult   ReturnCode   Integer       The return code of the                       Transcoding Job (either                       a successful or a                       warning)       JobResult   Message   String       A message with an                       explanation in case of a                       warning       JobResult   Duration   Integer       The duration it took this                       Transcoding Job (in                       milliseconds)       JobResult   Target           Details about the target.       Target   FileSize   Integer       The actual size of the file       Target   Location   String       The full-path on a                       shared storage or the                       Content ID of the                       attachment.       Target   ProfileID   String       The Profile ID that was                       used for this                       Transcoding Job (in                       case it was specified).       Target   TranscodingParams           The Transcoding                       Parameters of the target.       TranscodingParams   SizeLimit   Integer       The limit that was given                       to the entire transaction       TranscodingParams   Audio           Audio details       TranscodingParams   Image           Image details       TranscodingParams   Video           Video details       TranscodingParams   Text           Text details       TranscodingParams   CombinedMedia           Combined-media details       TranscodingParams   Transformation           A Transformation that                       was applied (0 or more                       appearances).       Transformation   Type   String   According to the   Type of transformation                   supported                   Transformations       Transformation   Parameter   String   According to the   Value of parameter for                   Supported   this transformation                   parameter values                   for the specific                   transformation       Audio   Format   String   The supported   The file format                   audio formats       Audio   Codec   String   The supported   The codec                   audio codecs       Audio   BitRate   Integer       The bit-rate       Audio   SamplingRate   Integer       The sampling rate       Audio   SamplingResolution   Integer       The sampling resolution       Audio   SizeLimit   Integer       The limit that was given                       for an audio       Audio   Synthetic       Optional   Synthetic audio related                       parameters.       Synthetic   ChannelToUse   Integer   Optional   Number of input channel                       used in case the output                       contains only one channel.       Synthetic   ChannelsPriority   String   Optional   A comma separated                       permutation of 0-15. The                       priority of the channels,                       from the most important                       to the least important.       Synthetic   Instrument   Integer   Optional   The instrument used,                       when transcoding to                       midi. Irrelevant for other                       formats.       Image   Format   String   The supported   The format                   image formats       Image   ColorScheme   String   “True24Bit”,   The color scheme of the                   “True12Bit”,   image                   “Palette256Co”,                   “Palette256Gr”,                   “Palette32Co”,                   “Palette32Gr”,                   “Palette16Co”,                   “Pallete16Gr”,                   “Palette4Co”,                   “Palette4Gr”,                   “1Bit”       Image   NunberOfColors   Integer       The actual number of                       colors       Image   Width   Integer       The width       Image   Height   Integer       The height       Image   SizeLimit   Integer       The limit that was given                       for an image       Video   Format   String   The supported   The format                   video formats       Video   Codec   String   The supported   The codec                   video codecs       Video   Width   Integer       The width       Video   Height   Integer       The height       Video   FrameRate   Integer       The frame rate       Video   BitRate   Integer       The bit rate       Video   SizeLimit   Integer       The limit that was given                       for a video       CombinedMedia   SizeLimit   Integer       The limit that was given                       for a combined-media       CombinedMedia   PresentationParams           Parameters for the target                       presentation                       transcoding.       PresentationParams   Format   String   “SMIL”,   Target presentation                   “HTML”,   format                   “None”       PresentationParams   Template   String       Template for                       presentation that was                       used.       PresentationParams   Layout   String   “Portrait”,   Target layout.                   “Landscape”       CombinedMedia   Encoding   String   “Textual”,   The encoding of the                   “WAP”   output MIME-Multipart.                  
 
         [0032]     A Transaction Failure response is returned in a situation where the whole Transaction could not be handled. This may happen if there was a problem with the Transaction parameters, or any other problem, which relates to the whole Transaction (and not only to one or more of the Transcoding Jobs). The header of a Transcoding error contains a line that indicates that there was an error (HTTP/1.1 500 Error), and the regular fields. The body of the SOAP, of a different structure from a successful one, is given in Table 4 below:  
                               TABLE 4                       Parent   Name   Type   Possible values   Description                       FaultResponse           The fault       FaultResponse   TransactionID   Integer       The unique ID that was                       received from                       the Application Platform in the                       request       FaultResponse   ContextID   Integer       A unique ID of the                       transcoding session                       that is given by the                       Transcoding platform       FaultResponse   TotalDuration   Integer       The total milliseconds it took                       the whole                       Transaction to be handled                       (until the error occurred)       FaultResponse   ReturnCode   Integer   Out of the possible                   error codes       FaultResponse   Message   String       An explanatory error message                  
 
         [0033]     It may be added that the Transcoding Platform supports the Transaction error codes indicated in the following Table 5:  
                   TABLE 5                       Error code   Error string                   1001   Parsing error       1004   Erroneous target structure       1005   Error in target data       1006   General server error       1008   No media detected in request message       1009   Response composition error (&lt;err-code&gt;)       1010   Number of concurrent requests exceeded the maximum       1011   Erroneous transcoding request       1012   Transaction result exceed maximal size       1013   Policy could not be accomplished and transaction failed.       1014   Policy could not be accomplished but transaction succeeded.                  
 
         [0034]     and that Transcoding Platform supports the Transcoding Job error codes indicated in the following Table 6:  
                   TABLE 6                       Error code   Error string                   2001   Error in input media       2002   Unsupported Content Type       2003   Unsupported Content Format       2004   Unsupported Content Codec       2005   Unsupported Content       2006   Unsupported transcoding request       2006   Unsupported Transformation       2007   No media detected in request message       2008   Output content size exceeds the limit       2009   Failed to read source content.       2010   Failed to write target content.       2101   DRM protected content: no transcoding done