Opened 2 years ago

Closed 2 years ago

#6466 closed defect (duplicate)

Compression Artifacts in the Alpha Channel

Reported by: NNois Owned by:
Priority: normal Component: undetermined
Version: unspecified Keywords: prores
Cc: Blocked By:
Blocking: Reproduced by developer: no
Analyzed by developer: no

Description

Hi,

There's high compression artifacts using the codec "prores_ks" with an Alpha channel (4444 mode)

example:

ffmpeg -i intranspfile.mov -c:v prores_ks -profile:v 4 -pix_fmt yuva444p10le -profile 4444 -metadata:s encoder="Apple ProRes 4444" -vendor apl0 -acodec pcm_s16le -f mov outfile.mov


Attachments (6)

MDP_shoot_170615-163740.jpg (287.8 KB) - added by NNois 2 years ago.
compressed file view
MDP_shoot_170615-163753.jpg (84.3 KB) - added by NNois 2 years ago.
compressed file RGB Straight
MDP_shoot_170615-163802.jpg (61.0 KB) - added by NNois 2 years ago.
Compressed file Alpha (good)
MDP_shoot_170615-163842.jpg (346.2 KB) - added by NNois 2 years ago.
Original file view
MDP_shoot_170615-163850.jpg (101.3 KB) - added by NNois 2 years ago.
Original file RGB straight
MDP_shoot_170615-163859.jpg (56.6 KB) - added by NNois 2 years ago.
Original Alpha

Download all attachments as: .zip

Change History (8)

Changed 2 years ago by NNois

compressed file view

Changed 2 years ago by NNois

compressed file RGB Straight

Changed 2 years ago by NNois

Compressed file Alpha (good)

Changed 2 years ago by NNois

Original file view

Changed 2 years ago by NNois

Original file RGB straight

Changed 2 years ago by NNois

Original Alpha

comment:1 Changed 2 years ago by NNois

As you can see in the linked files the Alpha Channel is producing compression bug in the color but not in the alpha !!

comment:2 Changed 2 years ago by cehoyos

  • Resolution set to duplicate
  • Status changed from new to closed

See #5995.

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