[FFmpeg-user] re-encoding yields lots of messages

jd1008 jd1008 at gmail.com
Thu Mar 24 20:43:31 CET 2016

like these:

warning, clipping 1 dct coefficients to -255..255:01:32.86 
buffer underflow i=0 bufi=234794 size=338165me=01:01:47.43 

The encode command is:

ffmpeg -i The_Previous_River_Trip.mp4 -vcodec mpeg1video -s 1920x1080 
-q:v 1 -y The_Previous_River_Trip.mpg

The mpg file seems to play just fine.

I just want to know what other parameter should I add to prevent 
underflow, and clipping.


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