Mailinglist Archive: opensuse (1264 mails)

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Re: [opensuse] Again, trying to find a suitable video editor - trying ffmpeg and failing: jerky video output, good sound
On 2017-06-15 11:32, Dave Plater wrote:


On 15/06/2017 10:52, Carlos E. R. wrote:
On 2017-06-15 09:28, Dave Plater wrote:


On 11/03/2016 04:04, Carlos E. R. wrote:
ffmpeg -i "input-file.mpeg" -ss 00:20:00.00 -t 00:5:00.00 \
-map 0:0 -c:v libx264 -preset ultrafast -vf crop=1920:804:0:138 \
-c:a copy output-file_0.mkv

then -map 0:1 y luego map 0:2

And yes indeed, the video stream is choppy, but not the two audio
streams. This matches the results with ProjectX, that finds the video
unusable.
To merge two identical videos use ffmpeg -f concat -i textfile -c copy
where textfile has lines "file video1" next line is "file video2" and so
on. See:
https://trac.ffmpeg.org/wiki/Concatenate

You mean that's the trick to copy sections from the same stream and
concatenate again into a single file? Yes, that's something I wanted to
know, thanks :-)


Don't forget to put -fflags genpts first it fixes a host of timing
problems. I use it all the time.

Thanks, I'll try to remember. Hum, better I'll write a note now :-)


--
Cheers / Saludos,

Carlos E. R.
(from 42.2 x86_64 "Malachite" at Telcontar)

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