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Description I want to merge two videos of different resolution by the scale and adding the pad if another video has a small resolution, below is the command I am using :
[-y, -i, input1.mp4, -i,input2.mp4, -filter_complex, [0]scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080\:-1:-1,setsar=1;[1]scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080\:-1:-1,setsar=1;[v0][a0][v1][a1]concat=n=2:v=1:a=1[v][a], -map, [v], -map, [a], -c:v, libx264, -c:a, aac, output.mp4]
Expected behavior It should not show me error Stream specifier 'v0' in filter graph description not match
Current behavior
Stream specifier 'v0' in filtergraph description [0]scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:-1:-1,setsar=1;[1]scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:-1:-1,setsar=1;[v0][a0][v1][a1]concat=n=2:v=1:a=1[v][a] matches no streams.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x724850a800] Invalid stream specifier: v0.
Environment
Any helpp will be appreciated