HEVC CQP Encoding has shade on big QP(for example, QP=50)

[seanvk]

migrated from Bugzilla #96545
status ASSIGNED severity normal in component intel for ---
Reported in version unspecified on platform x86 (IA32)
Assigned to: PengChen

Original attachment names and IDs:

• issue hevc cqp qp50.png (ID 124552)

On 2016-06-16 05:43:12 +0000, Focus.Luo wrote:

Created attachment 124552
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.

On 2016-07-18 03:40:46 +0000, Focus.Luo wrote:

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

[FocusLuo]

1.8.3 release no this issue, so closed it