Bug Report Resize quality issue with YUV source

[Fenarinarsa]

When resizing a source on the canvas, the resize algorithm have issues if the source is YUV resulting in luma/chroma artefacts and overall bad quality.

Checked on Windows 10 with a Blackmagic Declink Studio 2 / SDI input (8-bit YUV input, BGRA does not work).
OBS Studio 0.14.2

Workaround : adding a crop filter with default values (0/0/0/0) seems to convert the source to an image format the resize algorithm handles correctly.


May be related to this thread https://obsproject.com/forum/threads/webcam-bad-quali-after-resize.47022/

 

[Suslik V]

Can you post screenshot of your issue? And log file, please.

 

[Fenarinarsa]

Here are some screenshots + the requested log.

Meanwhile I've found that the culprit is the deinterlace option. When disabled the resize is okay, but as the input is interlaced I can't disable it. So maybe deinterlacing returns a picture format that is incorrectly handled afterwards.

Note that the deinterlace option also introduce an audio delay (I will report that on another thread since there is also an audio drift and I need to do more checking before reporting it).

 

[Suslik V]

You forgot 'good' screenshot (with crop filter as you said).

 

[Fenarinarsa]

Oops, sorry. The upload system is somewhat broken actually, the attached files list never refreshes.

Here it is. (I also modified the previous post)

 

[Suslik V]

Two questions:
1) If you setup I444 as Color Format?
2) How you take screenshots?

 

[Fenarinarsa]

Same issue with I444 color format.

Screenshots done by opening the source stream with VLC.