[theora] Accelerated video output with ffmpeg2theora 0.24

[j at v2v.cc]

Juhani Jaakola wrote:
> Does anybody have a clue what might be the problem here?
> 
> On 09/06/2009 01:00 PM, Juhani Jaakola wrote:
>> When I converted two files with ffmpeg2theora their duration changed shorter - they seem to play back with accelerated speed. When I play one of them with VLC, the video stops at 99 seconds but audio continues until 170 seconds. The other file is 120 seconds long but it is played back in 80 seconds.
>>
>> Here is ffmpeg2theora output:
>>
>> $ ffmpeg2theora --optimize --inputfps 25 -F 25 2002-05-23\ Juho\ prinssina.AVI
>> Input #0, avi, from '2002-05-23 Juho prinssina.AVI':
>>    Duration: 00:02:36.76, start: 0.000000, bitrate: 107321 kb/s
>>      Stream #0.0: Video: rawvideo, yuyv422, 720x576, 25 tbr, 25 tbn, 25 tbc
>>      Stream #0.1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
>>    Resize: 720x576
>>        0:02:36.76 audio: 78kbps video: 8080kbps, time elapsed: 00:13:26
>>
>> $ ffmpeg2theora --inputfps 25 -F 25 196X\ Juhani\ pienenä\ LAAJEMPI\ VERSIO.AVI
>> Input #0, avi, from '196X Juhani pienenä LAAJEMPI VERSIO.AVI':
>>    Duration: 00:01:59.59, start: 0.000000, bitrate: 109973 kb/s
>>      Stream #0.0: Video: rawvideo, yuyv422, 720x576, 25.02 tbr, 25.02 tbn, 25.02 tbc
>>    Resize: 720x576
>>        0:01:19.31 audio: 0kbps video: 5449kbps, time remaining: 00:04:19
>>
why does the input file have a framerate of 25.02? forcing input
framerate might not work, it was mostly used for video4linux devices.
but can have a look in the source to see if it can be extended to also
overwrite the framerate from the input container.


j