Why is the volume increased? Where did you learn about this?
I tried this now. It seems that
ffmpeg -i 5.1.mp4 -ac 2 2.mp4 works, but
ffplay -i 5.1.mp4 -ac 2 doesn't.
added 188 characters in body
I noticed something else: Normally, using the cursor keys, FFplay can jump 10 seconds (left/right) and 1 minute (up/down) in a streamed video. However, when streaming from two sources, the player instead jumps nothing(?) and maybe 2-3 seconds, respectively, while the program output says
no syncpoint at backptr pos. Can this be remedied in any way?
I also noticed that using
-f mp4 and
-f matroska doesn't work (
The muxer does not support seeking). Is there a container that will let me save the file to disk while streaming?
ffmpeg ... -f ??? - | tee out | ffplay ...
That's brilliant! Worked straight away. The streaming was a bit jerky, though that's probably a performance or bandwidth issue. One question: Do I need to specify
-headers before every