@gpatel-fr thank you for the mkv samples!
@gpatel-fr said:
this 'Microsoft MPEG-4 4.2' is probably the same thing as your '10 bit support'.
not really, the issue is definitely the bit depth of the video, correlated with the format profile. Higher definition videos such as H.264 AVC "High 10" profile (using mediainfo) :
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : **High 10@L3.1**
Format settings : CABAC / 5 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 5 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 46 s 0 ms
Width : 1 024 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 24.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : **10 bits**
Scan type : Progressive
Writing library : x264 core 165 r3222 b35605a
Encoding settings : cabac=1 / ref=5 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=8 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=18 / lookahead_threads=3 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=50 / rc=crf / mbtree=1 / crf=18.0 / qcomp=0.60 / qpmin=0 / qpmax=81 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Default : Yes
Forced : No
Color range : Limited
Color primaries : BT.601 NTSC
Transfer characteristics : BT.709
Matrix coefficients : BT.601
To reproduce this, you can use ffmpeg to enforce a higher bit depth on any of these samples:
ffmpeg -i test5.mkv -c:v libx264 -pix_fmt yuv420p10le -crf 18 -preset slow -c:a copy test5_10bit.mkv
and confirm it does not play on the UT player, despite desktop OSs having no issue playing it (at least that's my experience).
It does, as you suggested, play on (libertine) mpv or vlc, so it seems like a limitation of the default player (I'd open a bug on the app repository, but can't seem to find it for the media player).
