I met a problem when converting video stream into mpeg2 format with specified max bitrate in FFMPEG.
The input file has a high bitrate of about 40Mbps (resolution is 720P), what I want to archive is to get a
mpeg video of max bit rate of 9Mbps (keep same resolution)
But when I used
ffmpeg.exe -i Untitled720P.mp4 -c:v mpeg2video -c:a ac3 -r 25 -pix_fmt yuv420p -g 15 - b:v 6000000 -maxrate 9000000 -minrate 0 -bufsize 1835008 -packetsize 2048 -muxrate 10080000 -b:a 448000 -ar 48000 manual.mpg
there came out lots warnings of "buffer underflow", and the generated file has an overall bitrate of 29.7Mbps although 9000k is specified to be max.
This generated mpeg video, when played in VLC player, stopped somewhere.
So I want to know, if there's any other argument I can use to force ffmpeg to generate an output which strictly stays below the specified max bitrate? (I think it plays incorrectly because its acual bitrate exceeds what I specified)
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