I'm trying to map specific streams to specific output indexes. The command I'm using is more complex but it can be reduced to this simple example
ffmpeg -i input.mkv -y -map 0:0 -c:5 copy -f mp4 out.mp4
I expected this to copy stream
input.mkv into stream
out.mp4. The issue is that it copies it into stream
0 (I guess it's using a counter?). Why is that and how can I force it to assign it a different index number?
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))