[Ffmpeg-devel] question: wmv3 codec image "drifts"

[Benjamin Larsson]

Ryan Martell skrev:
> On Nov 29, 2006, at 3:05 AM, Benjamin Larsson wrote:
> 
>> Ryan Martell skrev:
>>> Hi--
>>> So I'm working on some mms streaming stuff.
>>> When I stream a file from an asx file, that's not live (but streamed 
>>> via mms), it looks great.
>>> When I play a live stream that's been encoded by the WM9 encoder, 
>>> there is a weird "drift" effect.  The I frames look great, and then 
>>> after that, the changes seem to drift.  The colors then get out of 
>>> whack slowly until the next I frame.
>>> Has anyone seen this before (in a non-streaming solution?)?  I know 
>>> I'm out on the bleeding edge with this, but thought someone might 
>>> have an idea.  Are there known limitations to the wmv3 decoder 
>>> (options that I can disable on the encoder side?)
>>> I don't really know enough about the codec to intelligently figure 
>>> out what it's doing.
>>> Thanks,
>>> -Ryan
>>
>> Can you provide a sample?
> 
> Not sure; I'll see if i can use ffmpeg to convert it from a streaming to 
> a wmv, and if that works, i'll see if it has the same problem.
> 
> The other option would be to get all the mms code in, and post the 
> streaming url, but there's lots of code and it always takes awhile to 
> get it all approved.
> 
> Thanks!
> -R

Dump a part of the stream with mplayer -dumpstream and see if you get 
the same drift from the dumped file.

MvH
Benjamin Larsson