RE: bitrate for custom FFMPEG

[JohnB1]

Hi i am using custom FFMPEG to change a video to a certain format.
in my commands i have used the video bitrate of 15Mbps but when i put the scale filter to 720x576, the video bitrate isn't going past 4Mbps after so many attempts on altering the commands.

Any ideas what the problem can be?
Thanks

[admin]

This is an impossible question to ask without know your command line. But you will have to search the web for constant video bit rate. Just setting a bitrate usually means variable bit rate adapted to the compexity of you video.

-steinar

[JohnB1]

-pix_fmt yuv422p -r 25 -non_linear_quant 1 -flags +ildct+ilme -top 1 -dc 10 -intra_vlc 1 -qmax 2 -lmin "1*QP2LAMBDA" -s 720x576 -minrate 10M -ar 48000 -ac 2

This is the command I am using for my custom FFMPEG. I have set the video bitrate as 15Mbps, and video codec is mpeg2video on the video option.
When I run this command, the video bitrate is only 8Mbps now. The original video bitrate is 114Mbps.

Any idea what I can be doing wrong?

[admin]

Well, maybe you can try this:

-pix_fmt yuv422p -r 25 -non_linear_quant 1 -flags +ildct+ilme -top 1 -dc 10 -intra_vlc 1 -qmax 2 -lmin "1*QP2LAMBDA" -s 720x576 -minrate 15M -bufsize 600000 -ar 48000 -ac 2

-steinar