APV fail with AppImage

[alatteri]

I'm interested in testing APV codec.... it fails with AppImage on Ubuntu 25.10

$ ./UltraGrid-8cfe1af-x86_64.AppImage --tool uv -t decklink -c libavcodec:encoder=liboapv
UltraGrid 1.9+ (master rev 8cfe1af built Nov 12 2025 10:00:11)

Display device   : none
Capture device   : decklink
Audio capture    : none
Audio playback   : none
MTU              : 1500 B
Video compression: libavcodec:encoder=liboapv
Audio codec      : PCM
Network protocol : UltraGrid RTP
Audio FEC        : none
Video FEC        : none

[DeckLink capture] Auto-choosen device 0.
[DeckLink capture] Using codec: UYVY
[DeckLink capture] Using device DeckLink 8K Pro (1)
[DeckLink capture] bmdDeckLinkConfigCapturePassThroughMode set to: bmdDeckLinkCapturePassthroughModeDisabled
The desired display mode is supported: 625i50 PAL
[DeckLink capture] Enable video input: 625i50 PAL
[DeckLink capture] Trying to autodetect format.
[DeckLink capture] Video Colorspace: Rec.709
[DeckLink capture] Video Dynamic Range: SDR
Control socket listening on port 38743
Frame received (#0) - No input signal detected
[DeckLink capture] Format change detected (display mode, color space - RGB444, 12bit).
[DeckLink capture] Detected 12-bit signal, use ":codec=UYVY" to enforce 8-bit capture (old behavior).
[DeckLink capture] Using codec: R12L
[DeckLink capture] Enable video input: 2Kp24 DCI
[lavc] Using codec: APV, encoder: liboapv
[lavc] Setting bitrate to 0.0 bps.
[lavc] Setting thread count to 0, type: (other)
[lavc] Selected pixfmt: yuv444p12le
[lavc] Selected pixfmt has subsampling 4:4:4, which is usually not supported by HW coders
[lavc] Use ':subs=420' or ':safe' to disable.
[lavc] Selected color depth 12 b may not be supported by HW coders.
[lavc] Use ':depth=8' or ':safe' to disable.
[lavc liboapv @ 0x7a678c001100] oapve_encode() failed
[lavc] Error encoding frame: Generic error in an external library
[lavc liboapv @ 0x7a678c001100] oapve_encode() failed
[lavc] Error encoding frame: Generic error in an external library
[lavc liboapv @ 0x7a678c001100] oapve_encode() failed
[lavc] Error encoding frame: Generic error in an external library
[lavc liboapv @ 0x7a678c001100] oapve_encode() failed

[MartinPulec]

Hi, I've tried with R12L R10k and I can confirm the problem. It seems like setting the codec yuv444p10le seem to be causing problems:

uv -t testcard:codec=R10k -c lavc:enc=liboapv   # --param lavc-use-codec=yuv444p10le
uv -t testcard:codec=R10k --param lavc-use-codec=yuv422p10le -c lavc:enc=liboapv

First command (yuv444p10le can explicitly enforced) is not working while the second with yuv422p10le is.

UPDATE: I've mistakenly tested just R10k not R12L at first. For the R10k, the above holds. As for R12L it looks like neither yuv444p12le nor yuv422p12le codec input pixel formats seem to work right now.

[MartinPulec]

I think I've figured this out - it seems like the APV profile (eg. 422-10 or 4444-12) needs to be set according to the input pixel format. While the default profile is 422-10, it needs to be set explicitly if input format doesn't match this one.

I'll push fix that sets the profile according to the input.

[alatteri]

Yes, that fixes it.

Does APV only work in YUV space? No RGB?

[DeckLink capture] Format change detected (display mode, color space - RGB444, 12bit).
[DeckLink capture] Detected 12-bit signal, use ":codec=UYVY" to enforce 8-bit capture (old behavior).
[DeckLink capture] Using codec: R12L
[DeckLink capture] Enable video input: 2Kp24 DCI
[lavc] Using codec: APV, encoder: liboapv
[lavc] Setting thread count to 0, type: (other)
[lavc] Setting codec parameter oapv-params to profile=444-12
[lavc] Selected pixfmt: yuv444p12le
[lavc] Selected pixfmt has subsampling 4:4:4, which is usually not supported by HW coders
[lavc] Use ':subs=420' or ':safe' to disable.
[lavc] Selected color depth 12 b may not be supported by HW coders.