[FFmpeg-user] Question about concat protocol

[Jan Ehrhardt]

Dennis Volodomanov in gmane.comp.video.ffmpeg.user (Sat, 20 Oct 2012
10:25:18 +1100):
>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 ;-)
>>
>> The broken frames should not be a problem. I have highly corrupted files
>> that still transcode fine while reataining the A/V sync.
>>
>After a bit more struggling, I finally managed to get video and audio in 
>sync. Looks like you were right - the framerates have to be a whole 
>number. My problem was that I was setting them on the final result, not 
>on individual files during filter processing.

You make me curious. What filter setup are you using at the moment? Note
to myself: I really have to test my setup on 29.97fps files.

>Does anyone know what I can try to remove or reduce the stitching 
>moment, when video and audio drop out for a few ms?

Two things come to mind: using fade filters to smoothen the stitch.
And/or playing around with the keyframes. Do the segments all start with
a keyframe? If not, try to find a way to put a keyframe at the beginning
of each segment. This discussion might give a clue:
http://ffmpeg.org/pipermail/ffmpeg-user/2011-November/003055.html

Jan