I 08:33:33 272851742 Using thesaurus: "/Applications/Aegisub.app/Contents/SharedSupport/dictionaries/th_en_US.dat" I 08:33:32 256690550 Create views and inner main window controls It's hard to tell if it's exactly what you want, but I hope it is close:įfmpeg -y -i Clip004.mp4 -i Rendered_track_001.mp4 -filter_complex " :s=1920x1080:r=25:d=1,format=rgba format=rgba xfade=transition=fade:duration=2:offset=0.5,format=rgba overlay=shortest=1" -map "" -c:v vp9 -c:a copy test.webm filter_complex " :s=1920x1080:r=25:d=1,format=rgba.Īlphamerge have no effect because vp9 codec does not support transparency.įor testing video with transparency, we may use libvpx-vp9 codec and -pix_fmt yuva420p. The solution is using color filter, instead of lavfi: ![]() ![]() It looks like -f lavfi -i :s=1920x1080:r=25:d=1 doesn't produce a transparent video. I also tried to use alphaextract and alphamerge like this ffmpeg -f lavfi -i :s=1920x1080:r=25:d=1 \Īlphaextract alphamerge" \īut it's fail with error The following filters could not choose their formats:Ĭonsider inserting the (a)format filter near their input or output.įailed to inject frame into filter network: Input/output errorĮrror while processing the decoded data for stream #2:0 filter_complex " xfade=transition=fade:duration=2:offset=0.5 \ But on the overlaying step transparent doesn't work. I already tried to use for the Empty places input with transparent color. I need to render that tracks to one track with ffmpeg.įor the "Track 001" I can "concat" clips to one track without any problem.īut the question is how I should concat clips for the "Track 002"? The "Empty" places must be transparent for the overlaying on the 3 step.
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