Changing decoders on Player make others turn blank [open source reproducer] #228
Comments
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I can't enable vdpau on ubuntu 24.04, vdpauinfo fails too. vaapi is recommended, it's available in wayland and x11. Can you upload the log? |
VDPAU logs |
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VAAPI is insanely slow, much slower than vanilla FFmpeg VAAPI logs |
Can you compare the fps of
You have to use EGL to get the best rendering performance. If no EGL, 0-copy extension is missing for amd gpus. I tested EGL on ubuntu with x11 at least 8 years ago, it's the default in wayland. For qt, you can use environment var |
Setting x11 display from qt is recommended: https://github.com/wang-bin/mdk-examples/blob/master/Qt/QMDKWidget.cpp#L32 |
some players have this error, others are good. I don't know why. Can you test with less players?
Weird, avfilter should not be used. |
VDPAU logs, 2 videos, x11 display set, EGL used |
./DecodeFps produce same fps with vaapi and vdpau, adding the QT_XCB_GL_INTEGRATION=xcb_egl env var gives good performance. Thank you |
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Describe the bug
When several videos playing, using VDPAU, changing one video to FFmpeg then back to VDPAU again make other videos turn black.
To Reproduce
Download the archive : boxes_switchHwAccel.zip
Compile.
Run the program.
Right click on a video box and select "switch hwAccel" => switches to FFmpeg
Right click on the same video box and select "switch hwAccel" => switches to VDPAU
=> other boxes turn black and stop playing
Environment:
Regards
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