On Wed, 13 Sep 2006 20:27:47 +0200, Maik Holtkamp wrote:
>> >> How can I transcode a low fps video so as to burn it as dvd?
>> ...
>> > I used to solve such[1] problems using -J fps...
Yes it works, your proposed solution:
"-f 20.000 --export_fps 25.000,3 -J fps"
Now the transcoded video is 25fps.
>> ...
>> Hmm... that's actually the next question I'll ask.
>>
>> Since the video frame rate has been increased from 20 to 25, shouldn't
>> we increase the audio frame rate (or something) as well? I know if the
>> frame rate is not changed, we can dump the audio them mux it back, but
>> what if the frame rate is changed?
>
> Frankly speaking ... give it a try. I dunno :(.
As I was afraid of, it didn't work:
-y ffmpeg -F mpeg2video -N 0x2000 -E 48000,16,2 -b 224
Sound frame rate (or something) didn't change, causing the av-sync problem.
I did some reading, then add "-J resample" to my command line, ie,
-y ffmpeg -F mpeg2video -N 0x2000 -E 48000,16,2 -b 224 -s2 -f 20.000
--export_fps 25.000,3 -J fps -J resample
But get transcode Segmentation fault. So is "-J fps,resample".
Tested on both transcode v1.0.2 and transcode v1.1.0-cvs (compiled in
April).
I guess it might be ok to to a/v streams separately. But, anyone know how
I can increase the audio frame rate as well?
thanks
