Problem capturing VP9

Marxon · November 19, 2024 at 11:34 AM

Hi everybody,

I don't know if this is a bug or supported at all but

capturing VP9 encoded videos via the internal grabber does not work.

The led visualization live-video screen shows the LibreElec logo but not the playing video.

The log repeats:

Code

2024-11-19T10:19:50.309Z [FLATBUFSERVER] (DEBUG) (FlatBufferServer.cpp:76:newConnection()) New connection from ::ffff:127.0.0.1
2024-11-19T10:19:50.310Z [IMAGETOLED|AmbiLight] (DEBUG) (ImageToLedsMap.cpp:113:ImageToLedsMap()) Previous line repeats 1 times
2024-11-19T10:19:50.310Z [MUXER|AmbiLight] (DEBUG) (PriorityMuxer.cpp:178:registerInput()) Register new input 'DRM@::ffff:127.0.0.1/FLATBUFSERVER' () with priority 150 as inactive
2024-11-19T10:19:50.352Z [MUXER|AmbiLight] (DEBUG) (PriorityMuxer.cpp:182:registerInput()) Reuse input 'FlatBuffer/COLOR' () with priority 150
2024-11-19T10:19:50.352Z [MUXER|AmbiLight] (DEBUG) (PriorityMuxer.cpp:422:updatePriorities()) Set visible priority to 150
2024-11-19T10:19:51.398Z [FLATBUFSERVER] (DEBUG) (FlatBufferClient.cpp:70:disconnected()) Socket Closed
2024-11-19T10:19:51.455Z [MUXER|AmbiLight] (DEBUG) (PriorityMuxer.cpp:359:updatePriorities()) Removed source priority 150
2024-11-19T10:19:51.455Z [MUXER|AmbiLight] (DEBUG) (PriorityMuxer.cpp:422:updatePriorities()) Set visible priority to 250
2024-11-19T10:20:21.554Z [FLATBUFSERVER] (DEBUG) (FlatBufferServer.cpp:76:newConnection()) New connection from ::ffff:127.0.0.1
2024-11-19T10:20:21.556Z [MUXER|AmbiLight] (DEBUG) (PriorityMuxer.cpp:178:registerInput()) Register new input 'DRM@::ffff:127.0.0.1/FLATBUFSERVER' () with priority 150 as inactive
2024-11-19T10:20:21.598Z [MUXER|AmbiLight] (DEBUG) (PriorityMuxer.cpp:182:registerInput()) Reuse input 'FlatBuffer/COLOR' () with priority 150
2024-11-19T10:20:21.598Z [MUXER|AmbiLight] (DEBUG) (PriorityMuxer.cpp:422:updatePriorities()) Set visible priority to 150
2024-11-19T10:20:22.630Z [FLATBUFSERVER] (DEBUG) (FlatBufferClient.cpp:70:disconnected()) Socket Closed
2024-11-19T10:20:22.705Z [MUXER|AmbiLight] (DEBUG) (PriorityMuxer.cpp:359:updatePriorities()) Removed source priority 150
2024-11-19T10:20:22.705Z [MUXER|AmbiLight] (DEBUG) (PriorityMuxer.cpp:422:updatePriorities()) Set visible priority to 250

Display More

Playing the same video H264 encoded does work propaply.

Best regards

Marxon

Pi4
LibreElec 12.0.1 (Kodi 21.1)
Framebuffer internal grabber
WS2812

pclin · November 21, 2024 at 9:50 AM Official Post

VP9/H265 is usually decoded on the hardware side or not 'normally' in the graphics memory so that the framebuffer grabber gets an image.

regards pclin

Marxon · November 21, 2024 at 12:37 PM

Hi pclin,

thanks for explanation!

Although I would now like to ask the nooby question why it not could simply be copied in the graphics memory?

Afaik there is only "normal" RAM and no special GPU Memory on the Pi?

Best regards

Marxon

Problem capturing VP9

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