Talk:IRiver Clix/Archive 1

message: I recently made some changes to the suggested commandlines. In my experience, most mencoder lavcopts are copied and re-copied from some ancient, poorly written guide that has probably dissolved into the mists of time. Everyone keeps copying these options without having any idea what they actually mean, or whether they are a good idea (they aren't). Consequently, with only one exception, all the mencoder guides out there range in quality from "shitty" to "terrible". The only knowledgably written online mencoder guide I know of is mplayer's official html guide. -lavcopts vhq is always lower quality and often slower than -lavcopts mbd=2; therefore, you should use mbd=2:trell:cbp (etc) for slower, higher quality encodes, and mbd=0 for fast encodes. vhq is the same as mbd=1, which is sort of deprecated, since it doesn't provide a useful speed/quality tradeoff. In short, it sucks.
Now, as for the vqscale stuff. First of all, the old text said that specifying vqscale is a reasonable way to control bitrate. In fact, specifying vqscale is relinquishing control of bitrate, since constant qp is mutually exclusive with ratecontrol. Worse, if you are using constant qp, there is absolutely no mechanism for preventing vbv buffer overflow on the decoding side... no wonder the guide kept complaining about choppy video. Other details: the guide's use of "vqmin=3" was rendered completely null and void by the use of vqscale (plus I don't see a strong reason to recommend it in any case); and, the second pass of a two-pass encode is incompatible with constant qp, since the very concept of combining the two makes absolutely no sense whatsoever.
BTW it would be nice if someone could either find out the true coded picture buffer size of the U10, or experiment with different bitrates/buffer sizes and get an idea of what works. The default buffer size with ffmpeg and mencoder/lavc is actually proportional to bitrate, so it varies. If you want to experiment with this, try the vbv_buf_size option in mencoder or the -bufsize option in ffmpeg. Snacky 00:46, 20 September 2006 (UTC)
thread_title:  mencoder/ffmpeg libavcodec command line suggestions that I changed 

message: It appears that U10 is no longer listed at http://www.iriveramerica.com and Clix more or less was a replacement / rebranding / renaming of U10. So, should this article be renamed to iriver U10 and iriver Clix? —Tokek 12:53, 12 January 2007 (UTC)
thread_title: Possible rename?

message: I have an iriver U10, and I tried to use ffmpeg to create a video using the set of options listed in the 4:3 example on this page -- the video would not play on my U10.  So far, I have yet to find a working set of options, so I haven't edited the page to fix the example.  (Maybe I should search the history of this page to see if there are older versions of that example command that might work?)
Deven 16:39, 14 February 2007 (UTC)
thread_title:  ffmpeg example doesn't work 

message: What formats are supported ?
The official page is not very informative either.
--Xerces8 08:34, 13 April 2007 (UTC)
thread_title:  Supported file formats? 

message: Could this wiki be more than a how-to page about the Clix? --68.111.220.12 07:04, 28 April 2007 (UTC)
thread_title:  Grievances.