I have an error while converting the file, how can I fix it?

Question

fmpeg

I have an error when converting a file, I can not understand what this program wants

Converting video from mkv to mp4, Destination: ./media/aaa2.mp4
ERROR: frame=    2 fps=0.0 q=0.0 size=       0kB time=00:00:00.02 bitrate=  16.5        
frame=    5 fps=3.9 q=0.0 size=       0kB time=00:00:00.11 bitrate=   3.3kbits/s        
frame=    8 fps=4.2 q=0.0 size=       0kB time=00:00:00.23 bitrate=   1.7kbits/s        
frame=   10 fps=3.0 q=0.0 size=       0kB time=00:00:00.27 bitrate=   1.4kbits/s        
frame=   13 fps=3.2 q=0.0 size=       0kB time=00:00:00.37 bitrate=   1.0kbits/s        
frame=   15 fps=3.2 q=0.0 size=       0kB time=00:00:00.46 bitrate=   0.8kbits/s        
frame=   18 fps=3.3 q=0.0 size=       0kB time=00:00:00.55 bitrate=   0.7kbits/s        
frame=   20 fps=3.3 q=0.0 size=       0kB time=00:00:00.62 bitrate=   0.6kbits/s        
frame=   22 fps=3.3 q=0.0 size=       0kB time=00:00:00.69 bitrate=   0.6kbits/s        
frame=   24 fps=3.4 q=0.0 size=       0kB time=00:00:00.76 bitrate=   0.5kbits/s        
frame=   27 fps=3.5 q=0.0 size=       0kB time=00:00:00.85 bitrate=   0.4kbits/s        
frame=   30 fps=3.6 q=0.0 size=       0kB time=00:00:00.95 bitrate=   0.4kbits/s        
frame=   33 fps=3.7 q=0.0 size=       0kB time=00:00:01.04 bitrate=   0.4kbits/s        
frame=   35 fps=3.7 q=0.0 size=       0kB time=00:00:01.11 bitrate=   0.3kbits/s

Answer 1

1) Give the command you are running?
2) "ERROR: frame= 2" Error on the second frame? But what if you try to convert another file of the same format, will it work? If yes, then the problem is in the source file.
3) I could be wrong here: ffmpeg has the -v debug option to display more detailed information. Run a command with it, possibly determine the cause of the error