I just checked a few of my OBS recordings & 24/48 PCM is working now, was it added in this build?
===================== General =====================
Complete name : D:\1080p H265\2020-12-23_11-13-09.mov
Format : MPEG-4
Formatprofile : QuickTime
Codec Id : qt 0000.02 (qt )
File size : 610 MB
Duration (ms) : 8mn 16s
Overall bit rate : 10.3 Mbps
Writing application : Lavf58.29.100
===================== Video =====================
Id : 1
Format : HEVC
Format info : High Efficiency Video Coding
Formatprofile : Main@L4.1@Main
Codec Id : hev1
Codec info : High Efficiency Video Coding
Duration (ms) : 8mn 15s
Bit rate : 8 006 Kbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 60.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Bits/(Pixel*Frame) : 0.064
Stream size : 473 MB (78%)
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
===================== Audio =====================
Id : 2
Format : PCM
Formatsettings, Endianness : Little
Formatsettings, Sign : Signed
Codec Id : in24
Duration (ms) : 8mn 16s
Bit rate mode : Constant
Bit rate : 2 304 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Stream size : 136 MB (22%)
Default : Yes
Alternate group : 1
Support for 24-bit (L)PCM audio was added between Nov 17 and Dec 1 2020. Nightlies built after Dec 1 should have this feature.
Fantastic! I've been testing some new settings in OBS today & I pulled one of the recordings in (to check B Frames) & when the audio started playing back I was quite surprised. Hell yeah, no more Vegas/mkvmerge workaround just to trim a recording!