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video264 · 16th February 2011, 08:24

Hi skampy, why CBR? simply because I will use the stream in broadcasting application (although broadcasting gradually allow VBR to be used in live transmission, while CBR still being the mainstream).

In x.264 setting, I used to write command line as follows:
x264 --tff --interlaced --bitrate 6999 --vbv-maxrate 6999 --vbv-bufsize 6999 --pass 1 -o blablabla xxxx

The encode result shows bitrate variation is small, however, once I remux into TS, the video bitrate become dynamic/variant (checking by TS analyser).

Something must be going wrong either in x264 or TS muxer.. I understand there is no absolute CBR in h.264, what I request for is just small variation which can be treat as CBR.

thanks.

16th February 2011, 08:24	#3 \| Link
video264 Registered User Join Date: Jan 2011 Posts: 5	Hi skampy, why CBR? simply because I will use the stream in broadcasting application (although broadcasting gradually allow VBR to be used in live transmission, while CBR still being the mainstream). In x.264 setting, I used to write command line as follows: x264 --tff --interlaced --bitrate 6999 --vbv-maxrate 6999 --vbv-bufsize 6999 --pass 1 -o blablabla xxxx The encode result shows bitrate variation is small, however, once I remux into TS, the video bitrate become dynamic/variant (checking by TS analyser). Something must be going wrong either in x264 or TS muxer.. I understand there is no absolute CBR in h.264, what I request for is just small variation which can be treat as CBR. thanks.