Opened 6 years ago

Closed 16 months ago

#3262 closed defect (fixed)

Interlaced VC-1 flat spots on static scenes.

Reported by: dannyboy48888 Owned by:
Priority: normal Component: avcodec
Version: git-master Keywords: vc1
Cc: Blocked By:
Blocking: Reproduced by developer: yes
Analyzed by developer: no


When playing interlaced VC-1 video (Doctor Who episodes 1080p) the video playback is now smooth, but the longer a scene goes with out alot of motion the more flat spots start to form. Can be verified by playing in any video player in software decode mode that is built with ffmpeg (yes I rebuilt after doing a git build)

version: ffmpeg version N-59422-g828ac6d

Attachments (1)

ticket3262_cut.vc1 (2.3 MB) - added by cehoyos 6 years ago.

Change History (6)

comment:1 Changed 6 years ago by dannyboy48888

The most visible episode with this issue is the "A Christmas Carol" Special. All files were created with MakeMKV 1.8.7

comment:2 Changed 6 years ago by cehoyos

Please provide a sample.

comment:3 Changed 6 years ago by dannyboy48888

(EDIT, forgot what decade we are in)

Google Drive Link:

Video Card LSPCI Info:
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Thames [Radeon HD 7500M/7600M Series]

Video Card Driver:
xf86-video-ati 7.2.0

Kernel Firmware:
CONFIG_EXTRA_FIRMWARE="radeon/BTC_rlc.bin radeon/TURKS_mc.bin radeon/TURKS_me.bin radeon/TURKS_pfp.bin radeon/TURKS_smc.bin radeon/SUMO_uvd.bin"

Works under SMPlayer and VLC just fine in GPU mode but exhibits said flaws in Software mode mainly in the edges, but once in the middle during the sample

Last edited 6 years ago by dannyboy48888 (previous) (diff)

Changed 6 years ago by cehoyos

comment:4 Changed 6 years ago by cehoyos

  • Component changed from undetermined to avcodec
  • Keywords vc1 added
  • Reproduced by developer set
  • Status changed from new to open

13 frames attached that show the problem clearly.

comment:5 Changed 16 months ago by cehoyos

  • Resolution set to fixed
  • Status changed from open to closed

Fixed by Jerome Borsboom in 362ce2db4bbc27bb74a82341558eaffb35d8397e

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