An audio and/or video generation system which is arranged in operation to generate audio and/or video material representative of an audio and/or visual source, said audio and/or video generation system comprising: a camera and a portable data processor; wherein the camera is arranged in operation to generate audio and/or video signals representing said audio and/or video material, the camera including a recording means which is arranged in operation to record said audio and/or video signals representing said audio and/or video material on a recording medium, and a metadata generation processor which is arranged in operation to receive said audio and/or video signals, and to generate first metadata automatically in association with said audio and/or video signals wherein said first metadata includes time code data representative of in and out points of one or more parts of the audio/video material, a picture stamp providing a digital representation of an image in the video material at IN and OUT time codes for the one or more parts of the audio/video material, and a unique identification code for each of the parts of the audio and/or video material, each unique identification code uniquely identifying the one of the parts of audio and/or video material, and the portable data processor is connected to the metadata generation processor of the camera via an interface having a predetermined format, and wherein the portable data processor is arranged to generate second metadata in response to user commands and to communicate the second metadata to said metadata generation processor via said interface, said second metadata including a shot identifier, which identifies a current shot from pre-planned production information describing shots of one or more scenes for the generation of said audio/video material, the pre-planned production information having been loaded on to the portable data processor, said recording means is arranged to record said second metadata with said first metadata and said audio and/or video signals on said recording medium to the effect that the time code data of the first metadata is recorded with the shot identifier for the one or more parts of the audio/video material represented by the time code data, and the metadata generation processor is arranged in operation to communicate the picture stamps to the portable data processor via the interface for display on a screen of the portable data processor. a camera and a portable data processor; wherein the camera is arranged in operation to generate audio and/or video signals representing said audio and/or video material, the camera including a recording means which is arranged in operation to record said audio and/or video signals representing said audio and/or video material on a recording medium, and a metadata generation processor which is arranged in operation to receive said audio and/or video signals, and to generate first metadata automatically in association with said audio and/or video signals wherein said first metadata includes time code data representative of in and out points of one or more parts of the audio/video material, a picture stamp providing a digital representation of an image in the video material at IN and OUT time codes for the one or more parts of the audio/video material, and a unique identification code for each of the parts of the audio and/or video material, each unique identification code uniquely identifying the one of the parts of audio and/or video material, and the portable data processor is connected to the metadata generation processor of the camera via an interface having a predetermined format, and wherein the portable data processor is arranged to generate second metadata in response to user commands and to communicate the second metadata to said metadata generation processor via said interface, said second metadata including a shot identifier, which identifies a current shot from pre-planned production information describing shots of one or more scenes for the generation of said audio/video material, the pre-planned production information having been loaded on to the portable data processor, said recording means is arranged to record said second metadata with said first metadata and said audio and/or video signals on said recording medium to the effect that the time code data of the first metadata is recorded with the shot identifier for the one or more parts of the audio/video material represented by the time code data, and the metadata generation processor is arranged in operation to communicate the picture stamps to the portable data processor via the interface for display on a screen of the portable data processor.