Am I using the hardware acceleration correctly?

[TheDreadPirate]

For a sanity check, can you try another video? Preferably one that isn't HDR? The video we've been trying is a bit weird. Has two video streams.

Code:

Stream #0:0[0x1](und): Video: hevc (Main 10) (hev1 / 0x31766568), yuv420p10le(tv, bt2020nc/bt2020/smpte2084), 3840x2160 [SAR 1:1 DAR 16:9], 60746 kb/s, 23.98 fps, 23.98 tbr, 24k tbn (default)
    Metadata:
      creation_time   : 2023-01-11T16:59:46.000000Z
      vendor_id       : [0][0][0][0]
      encoder         : HEVC Coding
  Stream #0:1[0x2](und): Video: hevc (Main 10) (dvhe / 0x65687664), yuv420p10le(tv, bt2020nc/bt2020/smpte2084), 1920x1080 [SAR 1:1 DAR 16:9], 12172 kb/s, 23.98 fps, 23.98 tbr, 24k tbn (default)
    Metadata:
      creation_time   : 2023-01-11T16:59:46.000000Z
      vendor_id       : [0][0][0][0]
      encoder         : DOVI Coding
    Side data:
      DOVI configuration record: version: 1.0, profile: 7, level: 6, rpu flag: 1, el flag: 1, bl flag: 0, compatibility id: 6

The first 4K HEVC 10 stream and a separate HEVC 10 + DOVI 7.6 stream that is 1080P instead of 4K? Its a bit unusual. Normally you have the HEVC and DV side channel in the same stream.