People,
I converted 21 JPGs to a video with:
ffmpeg -f concat -i concat_demuxer1.txt -vf scale=1024:576 -r 29.97
output1.mp4
I then added a silent audio track with:
ffmpeg -ar 44100 -acodec pcm_s16le -f s16le -ac 2 -channel_layout 2.1
-i /dev/zero \
-i output${i}.mp4 \
-vcodec copy \
-acodec aac \
-shortest output${i}_silent.mp4
I had another MOV file (fr=29.97) that I converted with:
newfn=`basename $fn .MOV`
ffmpeg -i $fn -vf scale=1024:576 ./${newfn}.mp4
When I concatenate them with (and other converted JPGs and MOVS on the
end) using:
ffmpeg -f concat -i inputs.txt -vcodec copy -acodec copy \
2019-03-22_#1_XR_ClimateEmergencyDeclarationDayNSW_LoRes.mp4
the concat succeeds OK but when I play the video, the audio is OK but
then when it gets to the converted MOV section, people are moving in
slow motion . .
Another odd thing, the first 21 converted JPGs at 4 sec each correctly
shows 84 sec when viewed with mpv but when the converted MOV starts it
jumps to ~3m 50s . .
So there is at least one problem but maybe two? Can anyone tell me what
I am missing?
Thanks,
Phil.
--
Philip Rhoades
PO Box 896
Cowra NSW 2794
Australia
E-mail: [email protected]
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