If that's the case for you, upgrade to a newer version of avconv or ffmpeg.Īs for stage 2. Note that some versions of AVconv (like the version in the Ubuntu repos) don't have support for filtergraphs. map -map 2:a -c:v libx264 -crf 23 -preset veryfast -c:a copy output.mp4 If you want to take the audio from your original input, use avconv -f image2 -r 25 -i d.png -i background.mp4 -i input.mp4 \ Make sure you use the same frame rate as the original input video. r 25 gives you a frame rate of 25 if you want another frame rate, just use a different number. map -c:v libx264 -crf 23 -preset veryfast output.mp4 To stitch them back together
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