hevcencode test code produces corrupted output on Tiger Lake

[GreystWdR]

Executing hevcencode test sample produces corrupted /tmp/test.265 output on TigerLake CPU.
Environment: ubuntu 23.10 + intel-media-va-non-free package.

Fresh build on similar environment on SkyLake CPU produces expected readable bitstream.
h264encode produces expected result on both CPU.

Fresh build ffmpeg execution with codec hevc_vaapi produces expected output.

[bai-isaac]

hi GreystWdR,
Could you please share your command line?
And could you please dump driver follow this wiki https://github.com/intel/media-driver/wiki/Decode-and-Encode-Debug-Tool-and-surface-dump and share here?
Thanks.

[GreystWdR]

Hi,
Running the sample with default arguments is enough to reproduce the pb so the command was simply ./hevcencode .
My guess is the the problem come from the initialization part in hevcencode sample as I was able to make the encoder work flawlessly with a recent ffmpeg build. I have tried to find the differences in the initialization code without success.
For now, I don't have access to a TigerLake platform anymore to generate the driver dump. I'll keep you updated if manage to get my hands on it again.
Cheers.

[GreystWdR]

Hi,
I got my hands back on a hardware platform similar to the previous one, I still have problem running the hevcencode sample provided in libva-utils.
After build of libvautils ./hevcencode produces bad bitstream unreadable with ffplay. I have tried the lowpower option without success either.

ffplay returns:

ffplay /tmp/test.265
ffplay version 6.1.1-3ubuntu5 Copyright (c) 2003-2023 the FFmpeg developers
...
[hevc @ 0x7bcf58001b80] Unknown HEVC profile: 0KB sq=    0B f=0/0
    Last message repeated 1 times
[hevc @ 0x7bcf58001b80] Invalid delta in scaling list data: -1.
[hevc @ 0x7bcf58001b80] SPS 0 does not exist.
[hevc @ 0x7bcf58001b80] PPS id out of range: 0
[hevc @ 0x7bcf58001b80] Unknown HEVC profile: 0

platform: CPU i7-1370PE
env : fresh ubuntu 24.04.1 LTS, software stack is upgraded to last release (but were failing with distribution packages version too):
gmmlib 22.5.2
libva 2.22.0
driver intel media 24.3.4 build in debug mode for dump as suggested.

Driver dump is attached here:
igd_Pid12036_Tid1980880704.zip

nb. the sample produces expected result on a laptop with skylake i7-6700HQ CPU (produced hevc bitstream is readable with ffplay).

thanks for your help,
Cheers.