10 bit and lossless (FFV1 and H265)

[Selur]

Audio
ID : 2
Format : PCM
Format settings : Little / Signed
Codec ID : in24
Duration : 4 min 8 s
Bit rate mode : Constant
Bit rate : 2 304 kb/s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 kHz
Bit depth : 24 bits
Stream size : 68.1 MiB (0%)
Language : English
Default : Yes
Alternate group : 1

to

Audio
ID : 2
Format : A_QUICKTIME
Codec ID : A_QUICKTIME
Duration : 4 min 8 s
Bit rate : 2 304 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Stream size : 68.1 MiB (0%)
Language : English
Default : Yes
Forced : No

seems like mkvmerge keeps the mov wrapper around the pcm stream.
Would need a (small) sample to play around to see if I can somehow convince it to not do that.

10-bits should be selectable, because not every files are 10-bit.

Since FFV1 is meant as a lossless codec I think it sticking with the input is normally the right way to go, but I'll think about it.