Variable Bit rate Mode & Lavf encoder version

[tearofthesun]

Hello,

I'm new to ffmpeg and I try to encode a video form .mkv to .mp4, using ffmpeg with libx264.
Everything works exactly like I want to, but there is one thing I dont know how, so I'm here to ask: "How to set video bit rate mode to variable?"

If necessary, I can post my ffmpeg command-line for you to help.

Sorry for my bad english.

Oh, and another questions, how can I find new version of Lavf? I see my Lavf version is: Lavf53.24.0 but seems like it's not the lastest version (I see that there is Lavf53.24.2)

Thanks in Advance.

[SassBot]

x264 already does use VBR for encoding unless you specifically use options to force CBR.

[tearofthesun]

Thank you, SassBot.

Any help for Lavf version?

[LoRd_MuldeR]

If you are on Windows, get an up-to-date FFmpeg build (including latest versions of all the libs) from here:
http://ffmpeg.zeranoe.com/builds/

And if you are on Linux, go build yourself, if the FFmpeg and or libs from your distro are too much outdated...