How 2 control video bitrate using ffpreset libx264

[lindylex]

I want to set my "-b 1320k " to this but my preset generate a huge file at 51328kbits/s

ffmpeg -i MVI_3781.AVI -vcodec libx264 -fpre C:\del\FFmpeg\libx264-lossless_ultrafast_lex.ffpreset  -b 1320k -f mp4 -r 30000/1001 main.mp4

The line above does not limit the bitrate.

Platform Windows

[poisondeathray]

since you're using a "lossless" preset , that implies that you cannot control the bitrate. The encoder will use whatever bitrate is necessary to achieve losslessness. Use a preset without "lossless" in the name

[lindylex]

Ok what do I have to do to control the bitrate? I don't want anything that high "51328k" i want ""-b 1320k". But I can not use "-vcodec libx264" option without the preset files on Windows.

[poisondeathray]

Not sure why you can't use -vcoded libx264? What error message?

You might a different compiled binary

I don't use ffmpeg for x264, I use x264 CLI

Have you looked here?
http://rob.opendot.cl/index.php/useful-stuff/ffmpeg-x264-encoding-guide/

[Baldrick]

Use another profile. http://rob.opendot.cl/index.php/useful-stuff/ffmpeg-x264-encoding-guide/

edit: Too slow. .

[lindylex]

poisondeathray and Baldrick I started off here. http://rob.opendot.cl/index.php/usef...ncoding-guide/ and this guide has errors.
1. This does not work "-acodec libfaac "
2"-vpre slow" you need to have a ffpreset file. The guide does a poor job at describing this. And you might need to use the absolute path like this "-fpre libx264-slow.ffpreset" The guide does not explain this since you can download ffmpeg from many source for Windows all over the internet and many don't have the preset file.
3. YOu get this error when you use the preset "Invalid option or argument: 'rc_lookahead=50', parsed as 'rc_lookahead' = '50'"


I will try the guide again since I have a better idea now and I will definetly try x264 CLI

Thanks, again for the input.

[poisondeathray]

IIRC, FFMPEG removed AAC support, something about license issue and distributing. I think it's OK if you can compile it yourself

Is there a reason why you are using ffmpeg? Do you need command line support for your goals?

There are many x264 CLI front end GUI's, and you can use NeroAAC which offers better quality than libav

[lindylex]

I would much rather use the commandline.