Bug 96545 - HEVC CQP Encoding has shade on big QP(for example, QP=50)
Summary: HEVC CQP Encoding has shade on big QP(for example, QP=50)
Alias: None
Product: libva
Classification: Unclassified
Component: intel (show other bugs)
Version: unspecified
Hardware: x86 (IA32) All
: medium normal
Assignee: PengChen
QA Contact: Sean V Kelley
Depends on:
Reported: 2016-06-16 05:43 UTC by Focus.Luo
Modified: 2016-09-08 01:59 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

hevc encoding qp=50 (165.81 KB, image/png)
2016-06-16 05:43 UTC, Focus.Luo

Description Focus.Luo 2016-06-16 05:43:12 UTC
Created attachment 124552 [details]
hevc encoding qp=50

1, to do a hevc cqp encoding for 2k yuv input
 ./mv_encoder -hevc -i ./$filename:${WIDTH}x${HEIGHT} -o ./$testname -SliceHeaderPack 1 -PictureCodingType 0 -RateControl 3  -ISliceQP $qp $gopsetting -FrameRate $fps -ProfileIDC 1 -LevelIDC $level -loglevel 0 -intra_only -NumRefFrames 0 -NumSlices 1 -LCUSize $lcu

2, to use Vega to view the encoded bitstream

3, found that there are some shade on the decoded picture.
Comment 1 Focus.Luo 2016-07-18 03:40:46 UTC
for HEVC CBR, hevc_enc_cbr_1080p_ipb_10_gop30_lcu16.h265, using Vega to analyse the encoded output bitstream, found the Max/min/average QP is 44, and then also found the shadow issue

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