VP9 source video results in borked render #92349

New Issue

Maxim · 2021-10-19T18:39:43+02:00

Maxim commented

2021-10-19 18:39:43 +02:00

System Information
Operating system: Arch Linux
Graphics card: AMD Polaris 22 (DRM 3.42.0, 5.14.12-arch1-1, LLVM 12.0.1)

Blender Version
Broken: 2.93.5, commit date: 2021-10-05 12:04, hash: a791bdabd0

Short description of error

After importing VP9 video and trying to render I got blocky render.

Exact steps for others to reproduce the error

Loaded default environment and chose "Video Editing"
Uploaded video file
Made simple modifications (split, audio replacement) without touching video parameters
Render video

Source video information (from ffmpeg -i):

Input #0, matroska,webm, from 'filename.mkv':
  Metadata:
    ENCODER         : Lavf58.76.100
  Duration: 00:03:20.11, start: 0.000000, bitrate: 348 kb/s
  Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv), 480x360, SAR 1:1 DAR 4:3, 24.87 fps, 24.87 tbr, 1k tbn, 1k tbc (default)
    Metadata:
      DURATION        : 00:03:20.000000000
  Stream #0:1: Audio: aac (LC), 44100 Hz, stereo, fltp (default)
    Metadata:
      HANDLER_NAME    : SoundHandler
      VENDOR_ID       : [0][0][0][0]
      DURATION        : 00:03:20.109000000

I do not use accelerated rendering.

I tried to change output parameters for video:

Raw PNG frames
MPEG-4 + H.264 Good
MPEG-4 + H.264 Loseless
MKV + H.264 Good
WebM + VP9 Good

Every time render gets borked. Preview shows original quality which isn't as bad as seen on screenshots.

When I converted source from MKV+VP9 to MPEG-4+H.264 blender finished render without artifacts.

**System Information** Operating system: Arch Linux Graphics card: AMD Polaris 22 (DRM 3.42.0, 5.14.12-arch1-1, LLVM 12.0.1) **Blender Version** Broken: 2.93.5, commit date: 2021-10-05 12:04, hash: a791bdabd0b2 **Short description of error** After importing VP9 video and trying to render I got blocky render. ![0007.jpg](https://archive.blender.org/developer/F11289192/0007.jpg) ![0006.jpg](https://archive.blender.org/developer/F11289205/0006.jpg) **Exact steps for others to reproduce the error** 1. Loaded default environment and chose "Video Editing" 2. Uploaded video file 3. Made simple modifications (split, audio replacement) without touching video parameters 4. Render video Source video information (from `ffmpeg -i`): ``` Input #0, matroska,webm, from 'filename.mkv': Metadata: ENCODER : Lavf58.76.100 Duration: 00:03:20.11, start: 0.000000, bitrate: 348 kb/s Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv), 480x360, SAR 1:1 DAR 4:3, 24.87 fps, 24.87 tbr, 1k tbn, 1k tbc (default) Metadata: DURATION : 00:03:20.000000000 Stream #0:1: Audio: aac (LC), 44100 Hz, stereo, fltp (default) Metadata: HANDLER_NAME : SoundHandler VENDOR_ID : [0][0][0][0] DURATION : 00:03:20.109000000 ``` I do not use accelerated rendering. I tried to change output parameters for video: - Raw PNG frames - MPEG-4 + H.264 Good - MPEG-4 + H.264 Loseless - MKV + H.264 Good - WebM + VP9 Good Every time render gets borked. Preview shows original quality which isn't as bad as seen on screenshots. When I converted source from MKV+VP9 to MPEG-4+H.264 blender finished render without artifacts.

Maxim commented

2021-10-19 18:39:43 +02:00

Added subscriber: @gudvinr

Germano Cavalcante commented

2021-10-25 02:56:09 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2021-10-25 02:56:09 +02:00

To reproduce the problem, a video file with the same specifications seems to be needed.
I haven't found a file like that to test, so I'm tagging the VFX team, (in case they have a file like that and can take a look at the problem).

To reproduce the problem, a video file with the same specifications seems to be needed. I haven't found a file like that to test, so I'm tagging the VFX team, (in case they have a file like that and can take a look at the problem).

Evan Wilson commented

2021-10-25 03:51:30 +02:00

Added subscriber: @EAW

Evan Wilson commented

2021-10-25 03:51:30 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Evan Wilson commented

2021-10-25 03:51:30 +02:00

I was thinking that this was most likely a duplicate of #91405 (VSE: Block artefacts in WEBM video on preview or export), but you are saying that the preview is ok? Can you upload a sample video?