Dmitry Ermilov comments

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                                            Dmitry Ermilov

Add hint for map operation

@XinfengZhang , it seems no concerns anymore. Can you please merge?

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

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

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

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...

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

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

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

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

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

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

Want two output from vpp for Sample_decode test

You can rely on this commit which shows example of decode->two VPPs: https://github.com/dmitryermilov/MediaSDK/commit/d5430f799e28ad1862fb4ff15acb605d5596d952 You need to add encoder after 2nd VPP: * add QueryIOSurf to get right num of surfaces...

Encoder fails

Hi @MonkeySon , what Linux kernel do you use?

Encoder fails

Since GPU hang is seen using both MediaSDK and ffmpeg, it's user mode driver issue. Can you please submit an issue against https://github.com/intel/media-driver/ ?