Downscaled videos look extremely bad with pronounced aliasing artifacts

UNCONFIRMED
Unassigned

Status

()

P3
normal
UNCONFIRMED
2 years ago
a year ago

People

(Reporter: dqeswn, Unassigned)

Tracking

(Blocks: 1 bug)

Trunk
Points:
---

Firefox Tracking Flags

(firefox56 wontfix, firefox57 wontfix, firefox58 affected)

Details

(Whiteboard: [gfx-noted], URL)

Attachments

(1 attachment)

(Reporter)

Description

2 years ago
Created attachment 8876476 [details]
UHD video downscaled on youtube.

Title says it all. See attachment for a screenshot of a UHD video downscaled on youtube.
(Reporter)

Comment 1

2 years ago
Well, this remained unacknowledged...

By the way I have an Nvidia GPU, in case downscaling quality is dependent on driver/manufacturer.

I remember from testing with progDVB that with EVR only Intel did downscaling properly, on Nvidia and AMD based platforms downscaled images looked horribly aliased.
Blocks: 778617
(In reply to avada from comment #1)
> Well, this remained unacknowledged...

That is because I'm fairly busy. Does this happen by default on YouTube or only when you manually select a resolution higher than what YouTube is selecting for you?
Component: Audio/Video: Playback → Graphics
(Reporter)

Comment 3

2 years ago
(In reply to Anthony Jones (:kentuckyfriedtakahe, :k17e) from comment #2)
> 
> That is because I'm fairly busy. Does this happen by default on YouTube or
> only when you manually select a resolution higher than what YouTube is
> selecting for you?

The latter. But Youtube is not everything. Many resolutions might not always be available.
status-firefox56: --- → wontfix
status-firefox57: --- → wontfix
status-firefox58: --- → affected
Priority: -- → P3
Whiteboard: [gfx-noted]
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