[FFmpeg-user] Generete one second of black video and relative silence audio with the same duration

[Gian Maria Allibrante]

Hi Moritz, thanks for reply, this one, im always unable to get round match duration:

echo VIDEO FORMAT CONTAINER DURATION:
ffprobe -v error -show_entries format=duration \
  -of default=noprint_wrappers=1:nokey=1 output.mp4
echo VIDEO STREAM DURATION:
ffprobe -v error -select_streams v:0 -show_entries stream=duration \
  -of default=noprint_wrappers=1:nokey=1 output.mp4

________________________________
Da: ffmpeg-user <ffmpeg-user-bounces at ffmpeg.org> per conto di Moritz Barsnick <barsnick at gmx.net>
Inviato: sabato 25 gennaio 2020 22:21
A: FFmpeg user discussions <ffmpeg-user at ffmpeg.org>
Oggetto: Re: [FFmpeg-user] Generete one second of black video and relative silence audio with the same duration

On Sat, Jan 25, 2020 at 20:54:20 +0000, Gian Maria Allibrante wrote:
> How can I generate a black mp4 video with relative silent audio track with ffmpeg, I need the audio and video tracks to correspond to the duration of 1 second.
> ffmpeg -f lavfi -i color=c=black:s=1920x1080:r=24/1 -c:v h264 -f lavfi -i anullsrc=cl=stereo:r=44100 -video_track_timescale 90k -c:a mp3 -b:a 320k -ar 44100 -ac 2 -t 1 out.mp4
>
> VIDEO FORMAT CONTAINER DURATION: 3.026000
> VIDEO STREAM DURATION: 3.000000
>
> how can i match these durations?

Which tool gives you this information? If I use your command, I get one
second duration. The ffmpeg conversion command says so, as does a
check of the resulting file with ffmpeg and mediainfo.

Cheers,
Moritz
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