Doom9's Forum - View Single Post

Blue_MiSfit · 16th February 2011, 09:35

Hi video264,

A few thoughts - but take these with a grain of salt. I didn't write the code. This is just how I understand it.

1) CBR in x264 is not "true" CBR - in the sense of every frame being the same size. Instead, when you set bitrate, maxrate, and bufsize to equal values, x264's VBV model will guarantee that over a period of one second, your bitrate will be no more than the given value.

2) If you must "fill the mux" so to speak, then you can add --nal-hrd cbr, which will pad the stream.

3) I'd strongly suggest you don't use tsmuxer. It's not remotely compliant. obe-vod is a fantastic new piece of kit that combines x264 with a validated ts muxer, provided by libmpegts

Cheers,
Derek

16th February 2011, 09:35	#5 \| Link
Blue_MiSfit Derek Prestegard IRL Join Date: Nov 2003 Location: Los Angeles Posts: 5,989	Hi video264, A few thoughts - but take these with a grain of salt. I didn't write the code. This is just how I understand it. 1) CBR in x264 is not "true" CBR - in the sense of every frame being the same size. Instead, when you set bitrate, maxrate, and bufsize to equal values, x264's VBV model will guarantee that over a period of one second, your bitrate will be no more than the given value. 2) If you must "fill the mux" so to speak, then you can add --nal-hrd cbr, which will pad the stream. 3) I'd strongly suggest you don't use tsmuxer. It's not remotely compliant. obe-vod is a fantastic new piece of kit that combines x264 with a validated ts muxer, provided by libmpegts Cheers, Derek __________________ These are all my personal statements, not those of my employer :)