How to record video with lossless audio (flac) using OBS local recording?

[mtbest]

Is it possible to record video with lossless audio (wide dynamic range, wav or flac) using OBS local recording?
Using output-advanced-recording I manage only to record flac audio, no video.

 

[koala]

To get both audio and video lossless, set simple output mode, then Settings->Output->Recording->Recording quality->Lossless Quality, tremendously large file size.
The resulting video has utvideo+pcm codec, like this:

General
Complete name               : D:\Dateien\Allgemein\Video\Aufzeichnungen\2020-10-06 11-17-14.avi
Format                      : AVI
Format/Info                 : Audio Video Interleave
File size                   : 754 MiB
Duration                    : 8 s 341 ms
Overall bit rate            : 759 Mb/s
Writing application         : Lavf58.29.100

Video
ID                          : 0
Format                      : RGB
Codec ID                    : ULRG
Codec ID/Info               : Ut Video Lossless Codec
Codec ID/Hint               : Ut Video
Duration                    : 8 s 333 ms
Bit rate                    : 758 Mb/s
Width                       : 2 560 pixels
Height                      : 1 440 pixels
Display aspect ratio        : 16:9
Frame rate                  : 60.000 FPS
Color space                 : RGB
Bit depth                   : 8 bits
Bits/(Pixel*Frame)          : 3.426
Stream size                 : 753 MiB (100%)

Audio
ID                          : 1
Format                      : PCM
Format settings             : Little / Signed
Codec ID                    : 1
Duration                    : 8 s 341 ms
Bit rate mode               : Constant
Bit rate                    : 1 536 kb/s
Channel(s)                  : 2 channels
Sampling rate               : 48.0 kHz
Bit depth                   : 16 bits
Stream size                 : 1.53 MiB (0%)
Alignment                   : Aligned on interleaves
Interleave, duration        : 21  ms (1.28 video frame)

 

[mtbest]

Thanks for your answer @koala. Tremendous file size is a barrier for me.

Is there a way to record compressed video and lossless audio?
I am experimenting with output-advanced-recording settings but I cannot find container format that supports such a combination.

Lossless audio is much smaller than lossless video, so I keep searching for solution in OBS.

 

[mtbest]

I found a combination of asf container that supports flac audio and mpeg video. File size is reasonable.

 

[R1CH]

I would recommend x264 / FLAC in a MKV container instead, ASF and MSMPEG4 are very old formats.

 

[mtbest]

MKV container is NOT AVAILABLE in the menu.
It would be my preference, but MKV is missing from the container dropout menu.

I tried various combinations of containers and codecs and OBS either stops recording with some error or produces file that does not have intended features.

 

[Harold]

matroska is the container type for mkv.