The video loses something, and in some players, pausing or doing any effect (slow, fast play, etc.) causes things similar to keyframe loss or corruption.

The resultant video plays (sort of), but the audio does not, in all playersĥ. Quicktime, however, shows the audio track ONLY has a zero length 0:00:00.0Ĥ. All tools show the audio in the mp4, they all show proper info for all the streams (vid and aud).ģ. The resulting file ends up 8MB larger (this is acceptable)Ģ. However, using map and copy with ffmpeg doesn't seem to work right:ġ. The new audio is the old, except de-hiss'd, normalized, and with several fades placed. m4a audio file and over-writing the existing one in an. I tried this (came here after trying and failing), with the option of taking an. bash: syntax error near unexpected token del mkvlist.txt bash: syntax error near unexpected token del filelist.txtįor /F 'delims= ' %%F in (mkvlist.txt) do ffmpeg.exe -i '%%F' -vcodec copy -aco dec copy '%%~dF%%~pF%%~nF.mp4'Ĭommand 'mdel' from package 'mtools' (main)Ĭommand 'delp' from package 'fp-utils-2.4.4' (universe)Ĭommand 'el' from package 'oneliner-el' (universe)Ĭommand 'tel' from package 'orville-write' (universe)Ĭommand 'deal' from package 'deal' (universe)Ĭommand 'hdel' from package 'hfsutils' (main)Ĭommand 'bel' from package 'belier' (universe)Ĭommand 'qdel' from package 'slurm-llnl-torque' (universe)Ĭommand 'qdel' from package 'gridengine-client' (universe)Ĭommand 'qdel' from package 'torque-client-x11' (universe)Ĭommand 'qdel' from package 'torque-client' (universe)ĭel: command not for /F 'delims= ' %%F in (mkvlist.txt) do ffmpeg.exe -i '%%F' -vcodec copy -acodec copy '%%~dF%%~pF%%~nF.mp4' Here are the probes: Input #0, png_pipe, from '3279407.png':

How I am creating the video (-shortest was giving me a 02 sec video which is why I explicitly specify 04 sec): ffmpeg -loop 1 -i 3279407.png -i 3279407.wav -c:v libx264 -c:a aac -to 00:00:04 3279407.mp4 -y It only seems to work in VLC and it seems to be over my head to get any further based on the research I have done. I have a png and wav that I am am combining into an mp4 video.

Ffmpeg mp4 to wav