Opened 7 years ago

Closed 7 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 7 years ago.
compressed file view
MDP_shoot_170615-163753.jpg​ (84.3 KB ) - added by NNois 7 years ago.
compressed file RGB Straight
MDP_shoot_170615-163802.jpg​ (61.0 KB ) - added by NNois 7 years ago.
Compressed file Alpha (good)
MDP_shoot_170615-163842.jpg​ (346.2 KB ) - added by NNois 7 years ago.
Original file view
MDP_shoot_170615-163850.jpg​ (101.3 KB ) - added by NNois 7 years ago.
Original file RGB straight
MDP_shoot_170615-163859.jpg​ (56.6 KB ) - added by NNois 7 years ago.
Original Alpha

Download all attachments as: .zip

Change History (8)

by NNois, 7 years ago

Attachment: MDP_shoot_170615-163740.jpg​ added

compressed file view

by NNois, 7 years ago

Attachment: MDP_shoot_170615-163753.jpg​ added

compressed file RGB Straight

by NNois, 7 years ago

Attachment: MDP_shoot_170615-163802.jpg​ added

Compressed file Alpha (good)

by NNois, 7 years ago

Attachment: MDP_shoot_170615-163842.jpg​ added

Original file view

by NNois, 7 years ago

Attachment: MDP_shoot_170615-163850.jpg​ added

Original file RGB straight

by NNois, 7 years ago

Attachment: MDP_shoot_170615-163859.jpg​ added

Original Alpha

comment:1 by NNois, 7 years ago

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 by Carl Eugen Hoyos, 7 years ago

Resolution: → duplicate
Status: new → closed

See #5995.

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