[FFmpeg-user] Question about concat protocol

[Dennis Volodomanov]

On 19/10/2012 2:11 AM, Jan Ehrhardt wrote:
> Hmmm. I am seeing a lot of my own struggles with filter_complex back in
> your command line ;-)

Yes, it's quite powerful, but getting it to work is a whole different 
story :)
> The broken frames should not be a problem. I have highly corrupted files
> that still transcode fine while reataining the A/V sync.
>
> Just a wild guess: try changing the video framerate into -r 30 or -r 25.
> I have done that before with the (US) 29.97fps videos and it seemed to
> work back then.

Thanks. I tried all (25, 30, 29.97) with and without "async 1" and 
nothing seems to produce proper results. I can see a tiny stitch moment 
at the end of the first file and audio goes out of sync after that. With 
pure "concat:" there is no such stitching moment at all - it's all very 
smooth.

    Dennis