I found that using MediaSDK-intel-mediasdk-21.3.5 version failed to decode on the machine (sample_decode.exe h264 -i 1.h264 -o 1.yuv), but using ffmpeg to use avcodec_find_decoder_by_name("h264_qsv"); the decoder can successfully decode normally

[1515guo]

System information

• CPU information(cat /proc/cpuinfo | grep "model name" | uniq):
• GPU information(lspci -nn | grep -E 'VGA|isplay):
• Display server if rendering to display(X or wayland):

Issue behavior

Describe the current behavior

Describe the expected behavior

Debug information

• What's libva/libva-utils/gmmlib/media-driver/Media SDK version?
• Could you confirm whether GPU hardware exist or not by ls /dev/dri?
• Could you attach dmesg log if it's GPU hang by dmesg >dmesg.log 2>&1?
• Could you provide vainfo log if possible by vainfo -a >vainfo.log 2>&1?
• Could you provide strace log if possible by strace YOUR_CMD >strace.log 2>&1?
• Could you provide libva trace log if possible? Run cmd export LIBVA_TRACE=/tmp/libva_trace.log first then execute the case.
• Media SDK tracer output (https://github.com/Intel-Media-SDK/MediaSDK/blob/master/tools/tracer/README.md)?
• Do you want to contribute a PR? (yes/no):

[1515guo]

[1515guo]

[1515guo]

No matter what h264 file is on this machine, sample_decode.exe always fails, but my machine uses sample_decode.exe to decode normally, and ffmpeg uses "h264_qsv" both machines are normal.

[1515guo]

I use Intel(R) Media SDK 2019 R1 to decode, can decode sucess，but the decoded data is often green screen

[1515guo]

[1515guo]

@dmitryermilov

[dmitryermilov]

Please try to add -hw: sample_decode.exe h264 -i 1.h264 -o 1.yuv -hw

[1515guo]

请尝试添加-hw： sample_decode.exe h264 -i 1.h264 -o 1.yuv -hw hello，i add -hw has fails

[dmitryermilov]

It's Ivybridge. Pretty old driver and HW. It's very hard to say what's wrong. I'd suggest you to experiment. Try -d3d9 vs d3d11. Try to collect msdk api traces (tracer is a part of MSDK Windows Dev kit) in case of ffmpeg and sample and compare. Try to remove MFXQueryAdapters call from the sample and hardcode some adapter value instead

[1515guo]

hello ，I commented out GetImpl and found that the decoding on some machines is normal, and the decoding on some machines is green screen.@dmitryermilov ，

[1515guo]

normal machines is i3 3210，the machines GetImpl is failed，MFX_ERR_NOT_FOUND(-9), MFXQueryAdapters failed

[dmitryermilov]

What is the difference between normal and non-normal machine?

[1515guo]

Sorry, what I mean is that on the i3 3210 machine, GetImpl failed and it can’t be decoded. I commented out GetImpl and used initPar.Implementation = MFX_IMPL_HARDWARE_ANY; and the decoding was successful, and the decoded data was normal.

What is the difference between normal and non-normal machine?

[1515guo]

I mean is that on the i3 3210 machine, GetImpl failed and it can’t be decoded. I commented out GetImpl and used initPar.Implementation = MFX_IMPL_HARDWARE_ANY; and the decoding was successful, and the decoded data was normal.

[dmitryermilov]

Ahh. Okay. Most likely old mediasdk run-time library doesn't support something which is needed by https://github.com/Intel-Media-SDK/MediaSDK/blob/510d19dcace1d8c57567fdd40b557155ab11ab8e/api/mfx_dispatch/windows/src/mfx_dispatcher.cpp#L542

[dmitryermilov]

I guess ffmpeg simply doesn't use MFXQueryAdapters. MFXQueryAdapters is an optional function.