Meh Belly Lint Collection

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I was having problems playing some mp4 files in windows on vlc and windows media player

General
Complete name                            : D:\Embrient Video Project\EMBRIENT a7iv MAY 28\C0187.MP4
Format                                   : XAVC
Codec ID                                 : XAVC (XAVC/mp42/iso2)
File size                                : 1.53 GiB
Duration                                 : 45 s 45 ms
Overall bit rate mode                    : Variable
Overall bit rate                         : 292 Mb/s
Frame rate                               : 29.970 FPS
Encoded date                             : 2025-05-28 21:34:36 UTC
Tagged date                              : 2025-05-28 21:34:36 UTC

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High 4:2:2 Intra@L5.1
Format settings, CABAC                   : No
Format settings, GOP                     : N=1
Format settings, Slice count             : 8 slices per frame
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 45 s 45 ms
Bit rate mode                            : Variable
Bit rate                                 : 287 Mb/s
Width                                    : 3 840 pixels
Height                                   : 2 160 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 29.970 (30000/1001) FPS
Standard                                 : Component
Color space                              : YUV
Chroma subsampling                       : 4:2:2
Bit depth                                : 10 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 1.154
Stream size                              : 1.50 GiB (98%)
Encoded date                             : 2025-05-28 21:34:36 UTC
Tagged date                              : 2025-05-28 21:34:36 UTC
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
Metas                                    : 3
Codec configuration box                  : avcC

Audio
ID                                       : 2
Format                                   : PCM
Format settings                          : Big / Signed
Codec ID                                 : twos
Duration                                 : 45 s 45 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                              : 8.25 MiB (1%)
Encoded date                             : 2025-05-28 21:34:36 UTC
Tagged date                              : 2025-05-28 21:34:36 UTC

Other
ID                                       : 3
Type                                     : meta
Format                                   : rtmd
Codec ID                                 : rtmd
Duration                                 : 45 s 45 ms
Bit rate mode                            : Constant
Encoded date                             : 2025-05-28 21:34:36 UTC
Tagged date                              : 2025-05-28 21:34:36 UTC

I tried AJA and MPV/MPV.net and while both but both had clunky interfaces

I found smplayer uses mpv for playback but provides a usable interface.

SMPlayer Download

The second problem is that windpws will not generate thumbnails for these codecs natively, Klite Codec Pack is the fastest way to gain that functionality.