Question / Help FFmpeg Video encoder setting

[Xprim]

Hey guys,

My recording option is set to use ffmpeg, mp4, libx264. The following options: fast-pskip=0 preset=medium works well.
Now I'd like to change the ref & bframes options but none of these commands change anything: ref=9 bframes=5 or refs=9 bf=5. Why is that? And how to change the abr mode to the cbr?

Also tried to put ffmpeg command line format yet still the same.

Thanks in advance,
cheers

 

[Xprim]

Hey,
Still trying to change those parameters. Someone?
cheers

 

[Suslik V]

Please post a log with your issue! Here's how...

 

[Xprim]

Sure,
Here is one using directly x264: https://gist.github.com/anonymous/9ff9e724997b7a52ba8477a7151cf5cd
and the other using ffmpeg/libx264 (fast-pskip=0 preset=fast is set and well activated-doesn't show on log) : https://gist.github.com/anonymous/9825b6655a6d2b4da7991c88d528f6b1

 

[Suslik V]

So, what's wrong? The level restriction is maximum use of 4 reference frames and you want to use maximum up to 9. The level has higher priority as I understand.

Presets:
http://dev.beandog.org/x264_preset_reference.html

Levels:
...
4.1 = 1920x1080@30.1 (max ref frames = 4)
...
The levels table is there: OBS Studio Help Guide - https://obsproject.com/forum/resour...ware-studio-multiplatform-help-guide-pdf.365/ (look for H264 profiles and levels)

 

[Xprim]

I agree and I know, but I wanted to change it because sometimes I record in 720p. Can you tell me what command I need to insert when I'm using ffmpeg?
Same thing with the bframes. Do you know how to change it?
I'm used to use ffmpeg and x264 to encode using scripts, gui programs etc but I'm stuck with OBS to set specific parameters :/
thx for your time.

 

[Suslik V]

FFmpeg is huge. I only know that some custom codecs can show the errors hint in the obs log:
https://github.com/jp9000/obs-studio/commit/43032539204fe4a454009bd687fb7bcd5cdc4ed2

Please, provide screenshot of the Custom Output (FFmpeg) settings.

 

[Xprim]

You see, I tried all command I'm aware of right after "preset=fast", in front of even between etc no luck everytime :/

 

[Suslik V]

Don't know how you want to use this, but the string, that has no real meaning, should look like this:

preset=slower crf=38 x264-params=bframes=0:no-cabac=1

the options right after the "x264-params" just overwrites preset settings that was set before this key (look at the string). Thus video encoded without bframes allowed and cabac disabled. Edit: in your case, you can try "fast_pskip=0" istead of "bframes=0", for parameters names - just look at the string that NAL type 6 has in each mp4 file of your current recording MediaInfo of the file - Encoding settings string.

 

[Xprim]

Hey,
My string work as I wish and all I needed was yours "x264-params=bframes=X:XXXXXX" The missing thing I didn't have was the "=" right after params.
Thx to you I can now configure my settings as desired!
I know it overides and I also know Mediainfo ;)
Anyway, many thx for your help. Really appreciated! Hope this will help people in my situation.
You're the best