[FFmpeg-devel] Encoding video stream into CIF and 25 fps video format

[Anthony Chapellier]

Benoit Fouet a ?crit :
> Michel Bardiaux wrote:
>   
>> Anthony Chapellier a ?crit :
>>   
>>     
>>> Hi,
>>>
>>> I'm a beginner with video codecs and ffmpeg so I'd appreciate some help.^^
>>>
>>> I'm doing some devel on a program which encode a video stream provided 
>>> by a webcam using h263 codec from libavcodec library. Until today, the 
>>> program has been working perfectly fine and encoded the video into QCIF 
>>> and 10fps video format.
>>>
>>> However, I wish to change those settings and encode the video into CIF 
>>> and 25 fps video format. And this is my big problem !!! Firstly I'm 
>>> unable to get 25 fps, the video stream don't go over 15 fps... 
>>> Secondary, when I try to encode the video into CIF I got a lot of error 
>>> messages :
>>>
>>> - rc buffer underflow
>>> - concealing xxx DC, xxx AC, xxx MV errors
>>>
>>> And something weird is that the video quality is really good during a 
>>> few seconds and after that it's full of grey pixels.So do you know how I 
>>> could solve this problem ? is there some setting I didn't well like 
>>> buffer size, bit rate or something else... ?
>>>
>>>     
>>>       
>> We cant do anything without the exact command used and its output messages.
>>
>>   
>>     
>
> and such questions belong to ffmpeg-user
>
>   
Sorry, I just tought ffmpeg-devel was better than ffmpeg-user since I'm 
working directly on the program code. But I'll ask there if you say so.

-- 
M. Anthony Chapellier
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