[FFmpeg-user] concat, "Too many invisible frames"
george at nsup.org
Sun Aug 21 13:31:06 EEST 2022
Emanuel Berg (12022-08-21):
> >> ffmpeg \
> >> -i $src1 \
> >> -i $src2 \
> >> -filter_complex "[0:v] [0:a] [1:v] [1:a] concat=n=2:v=1:a=1 [vv] [aa]" \
> >> -map "[vv]" \
> >> -map "[aa]" \
> >> $dst
You are on the right track.
> > Now OTOH it seems to be the resolution :) And possibly other
> > errors as well ...
> > [Parsed_concat_0 @ 0x55f3df730c80] Input link in0:v0
> > parameters (size 1920x1080, SAR 1:1) do not match the
> > corresponding output link in0:v0 parameters (640x480, SAR 1:1)
Read the error message: your inputs do not have the same resolution, you
need to insert filters (scale, pad, crop, whatever you want) between the
inputs and the concat filter.
> The other method on that page  also don't work on these
> files what I can see/implement ... (?)
> $ ffmpeg -y -i $src1 -c copy -bsf:v h264_mp4toannexb -f mpegts $dst1
> [h264_mp4toannexb @ 0x55c9452bcc80] Codec 'vp9' (167) is not
> supported by the bitstream filter 'h264_mp4toannexb'.
> Supported codecs are: h264 (27)
Again, read the error message: you are applying a method specific to
H.264 to a VP9 stream.
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