[FFmpeg-user] Problem with concat - sound and picture breaks

Loadlinx limiteddi at gmail.com
Fri Aug 15 04:00:39 CEST 2014

On Thu, Aug 14, 2014 at 12:27 PM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
> Loadlinx <limiteddi <at> gmail.com> writes:
>> picture and sound breaks badly.
>> /root/bin/ffmpeg -y -re -f concat -i /home/ftp/kids/kids.txt
> Unrelated: Please note that it is _very_ much unadvisable to
> run ffmpeg as root.
>> -vcodec copy -preset superfast -acodec copy
>> -dts_delta_threshold 1000 -ar 44100 -ab 32k
>> -f flv rtmp://
> (I don't know much about rtmp: Is -f flv rtmp://
> really the intended syntax??)
> So you are reporting that the following doesn't
> work as expected:
> $ ffmpeg -f concat -i input rtmp://...
> I concede that such questions and very similar
> ones are asked often but I still wonder how
> much sense they make: I assume that you aren't
> sure if this is a problem with the concat input
> or the rtmp output and I am not sure either.
> But the difference is that for you it is quite
> simple to first test concat input with file
> output and then rtmp output with file input to
> find out (while I can only guess).
> And please always provide complete, uncut console
> output.
> Carl Eugen
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Concat works, it streams the channel and play next one after previous
one is done. Something happens with transcoding mid way and it starts
to break the picture. This is not a problem in rtmp as looping through
random files works well.

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