Question / Help How to specify pixel format for Prores_ks (ffmpeg)

[cedric75018]

Hello !

I am trying to capture my Windows desktop using the Prores_ks codec (with the custom output FFMpeg).

In order to capture in 4444 mode I need to add some video encoder settings (if not the Prores captures in HQ mode 422). Here is my exact (not working)line for "Video Encoder Settings (if any)" : profile=4 pix_fmt=yuv444p10le The problem is that OBS doesn't accept the "pix_fmt=yuv444p10le" :( Is there a trick to activate it or to force it ?

Thank you for your help !!!!

 

[roger-bratseth]

Have you tried specifying "4444" as profile? Should this string be put in the "Video Encoder Settings"-field?

 

[gewone]

I'm trying to accomplish the same, to no avail. I want to specify pure ffmpeg parameters, like (not for real purpose but here more as a proof of concept) I'm trying to parse -pix_fmt gray to output a grayscale image, but neither having it in the muxer settings field or encoder settings field outputs a grayisch video. I found this thread ...

Recording with Custom FFmpeg output: How to Set Parameters

I'm using OBS on Linux. I have tried to record screen by integrated graphics card via VAAPI on ffmpeg with the following command: ffmpeg -vaapi_device /dev/dri/renderD128 -f x11grab -video_size 1920x1080 -i :0 -c:v hevc_vaapi -qp 36 output.mp4 This works perfectly, but in OBS's settings pane...

obsproject.com

.. suggesting that options can't be in ffmpeg native "-parameter option" format but needs to be in "parameter=option" for OBS to treat 'em so I tried doing so but to no avail! Is there a limitation in OBS not making this even possible? I'm running the latest version (29.x), if you ask.

--EDIT--
Found yet another thread targeting this issue:

FFmpeg rawvideo: output in wrong pixel format!

Unsure if I'm in the right place, but I cannot find other support related categories. I am trying to set the pixel format for rawvideo in the Custom Output (FFmpeg) settings. In standalone FFmpeg, the actual output is formatted correctly when using the argument -pix_fmt rgb24. In OBS, the...

obsproject.com

No respondents however.
Are we all out of luck?

 

[Suslik V]

@gewone OBS internal architecture sets restrictions on what parameters can be set. OBS uses own shaders to prepare the color planes for encoding. Thus, you can set Settings > Advanced > Color Format instead of trying to hijack pix_fmt setting of FFmpeg.

In the "Video Encoder Settings (if any)", for "prores_ks (prores)" video encoder you can try to override only:

profile
quant_mat
bits_per_mb
mbs_per_slice
vendor
alpha_bits