Opened 2 years ago

Closed 2 years ago

#134 closed defect (fixed)

VTM can result in different kbps under different platform

Reported by: johnnyyang Owned by: XiangLi
Priority: major Milestone: VTM-3.1
Component: VTM Version: VTM-3.0
Keywords: Cc: ksuehring, XiangLi, fbossen, jvet@…

Description

The bitrate mismatch between two different platform (windows and linux) is discovered in the following sequences and QPs on RA configuration:

Sequence QP
Class A1FoodMarket422
Campfire 22
Campfire 32
Class B RitualDance32
Cactus 27
Class F SlideShow 27

The difference are negligible so that it find no issue in summary table. However, it might still cause mismatch while companies are doing crosscheck in the following CE and JVET meeting. After checking with several companies (e.g. HiSilicon and ITRI), the issues were confirmed but there are no solutions so far.

Attachments (4)

VTM3.0enclog_Windows.rar (37.1 KB) - added by johnnyyang 2 years ago.
encode log of windows platform
VTM3.0enclog_Linux.rar (45.7 KB) - added by johnnyyang 2 years ago.
encode log of Linux platform
VTM-3.0_R_Foxconn_T_HHI.xlsm (212.6 KB) - added by johnnyyang 2 years ago.
Summary report of different platform
VTM3.0_10a973e_RA.xlsm (192.6 KB) - added by johnnyyang 2 years ago.
RA CTC result for VTM3.0 ver.10a973e

Download all attachments as: .zip

Change history (10)

Changed 2 years ago by johnnyyang

encode log of windows platform

Changed 2 years ago by johnnyyang

encode log of Linux platform

Changed 2 years ago by johnnyyang

Summary report of different platform

comment:1 Changed 2 years ago by johnnyyang

Attached Summary report(VTM-3.0_R_Foxconn_T_HHI.xlsm​)
I had mark the difference in orange in RA page.

comment:2 Changed 2 years ago by ksuehring

Issue #129 reported also a mismatch between Windows and Linux. Can you check with current master, if the fix for #129 also fixes the issues that you are seeing?

comment:3 Changed 2 years ago by johnnyyang

As Xiang mentioned, issue #129 related to CPR is not enabled in default in VTM.
If our computing power is not tense,
We would like to volunteer to help check the results on top of Windows platform when this issue is fixed.
Please let us know if any.

comment:4 Changed 2 years ago by XiangLi

  • Owner set to XiangLi
  • Status changed from new to assigned

Please check whether merge request !135 (https://vcgit.hhi.fraunhofer.de/jvet/VVCSoftware_VTM/merge_requests/135) fixes the issue.

Changed 2 years ago by johnnyyang

RA CTC result for VTM3.0 ver.10a973e

comment:5 Changed 2 years ago by johnnyyang

This issue can be solved at VTM3 git version (10a973e)

Please find attached(VTM3.0_10a973e_RA.xlsm)
Reference: RA result based on Linux platform (Thanks Tencent)
Tested: RA result based on Windows platform (Thanks Foxconn)

comment:6 Changed 2 years ago by XiangLi

  • Milestone set to VTM-3.1
  • Resolution set to fixed
  • Status changed from assigned to closed
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