Fix youtube video = blocky?

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Batman

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#205837 29-Nov-2016 10:44

Hi my desktop (Nvidia 1060) plays youtube videos that are in HD very blocky; I think they are not being deinterlaced correctly - (4K is fine?).

I don't see an option on my GeForce control panel to adjust specific deinterlacing or anything like that.

Other video played in say VLC is fine ...

Any ideas? Can't say I've noticed this before today ... Hmm ...

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#1679317 29-Nov-2016 10:51

Tried all different browsers? May be browser settings h/w optimisation related.

Batman

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#1679320 29-Nov-2016 10:54

Just did that, all browsers are the same. Maybe it's the video that is blocky ... just that I didn't notice this before ...

Rikkitic

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#1679347 29-Nov-2016 11:01

Some YouTube stuff is pretty low-res, even if it is sent as HD. Pass the link around and see what others experience.

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#1679407 29-Nov-2016 12:41

Ok here's an example https://www.youtube.com/watch?v=MGVmB6V-m78

Look for deinterlacing blocks

Djmixerdomo

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#1679422 29-Nov-2016 13:03

I see what you mean...

The effect is much more distracting when watching it in the small YT window (pic above), but it is far less noticeable when you fullscreen it.

Fullscreen:

I'm pretty sure this just caused by the way they've recorded/edited the video.

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Sam91

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#1679425 29-Nov-2016 13:10

joker97:

Ok here's an example https://www.youtube.com/watch?v=MGVmB6V-m78

Look for deinterlacing blocks

Perfect image quality for me. MacBook Air - Safari

I ended up watching the whole video : )

Rikkitic

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#1679437 29-Nov-2016 13:21

Quality for me is also fine. No artefacts. I don't know what is going on here, but it has to be something at your end.

I just downloaded it as MP4. Still looks fine on playback. I could send you a chunk just to see what happens when you run it through your media player.

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Djmixerdomo

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#1679450 29-Nov-2016 13:43

Sam91:

joker97:

Ok here's an example https://www.youtube.com/watch?v=MGVmB6V-m78

Look for deinterlacing blocks

Perfect image quality for me. MacBook Air - Safari

I ended up watching the whole video : )

What codec is YT using when playing the video for you? Right-click > stats for nerds > eigth line down, Mime Type: ..... codecs="___"

I just did some quick testing using different browsers (Chrome, Firefox, Edge and IE). I noticed that the first three all use the vp9 codec when playing youtube videos and when watching this video I see the weird distortion. Comparing this to IE which uses avc1.4d401e (H.264), I do not see the distortion.

I think that if your browser is using the 'VP9' codec then you'll probably see this anomaly.

If it says 'avc1.4d401e' (H.264) then it you'll likely not see this issue when viewing interlaced videos.

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Batman

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#1679454 29-Nov-2016 13:50

Thanks, will report back with the codec. Just wanted to know it's not my GPU :)

Doesn't help my desktop has giant monitor

Played on the laptop again and I if I put my face to the screen I can see the artefacts :) [VP9 on laptop]

Sam91

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#1679455 29-Nov-2016 13:51

Djmixerdomo:

Sam91:

joker97:

Ok here's an example https://www.youtube.com/watch?v=MGVmB6V-m78

Look for deinterlacing blocks

Perfect image quality for me. MacBook Air - Safari

I ended up watching the whole video : )

What codec is YT using when playing the video for you? Right-click > stats for nerds > eigth line down, Mime Type: ..... codecs="___"

I just did some quick testing using different browsers (Chrome, Firefox, Edge and IE). I noticed that the first three all use the vp9 codec when playing youtube videos and when watching this video I see the weird distortion. Comparing this to IE which uses avc1.4d401e (H.264), I do not see the distortion.

I think that if your browser is using the 'VP9' codec then you'll probably see this anomaly.

If it says 'avc1.4d401e' (H.264) then it you'll likely not see this issue when viewing interlaced videos.

Yep you're bang on, avc1.4d401e

Batman

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#1679456 29-Nov-2016 13:52

Sam91:

joker97:

Ok here's an example https://www.youtube.com/watch?v=MGVmB6V-m78

Look for deinterlacing blocks

Perfect image quality for me. MacBook Air - Safari

I ended up watching the whole video : )

It's all the the voice videos. I picked this at random. Don't pay too much attention to the horrible singing though. This one is sings better. Suspect it's a half a hit wonder ...

dclegg

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#1679461 29-Nov-2016 13:58

I get differing results based on the browser (2013 Macbook Pro running macOS Sierra)

Chrome:

Safari:

Rikkitic

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#1679469 29-Nov-2016 14:10

I am running a Chrome-based browser on Windows and I don't see anything like either image. Resolution is better and no sign of artefacts. Is using VP9 codec.

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Batman

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#1679471 29-Nov-2016 14:20

Rikkitic:

I am running a Chrome-based browser on Windows and I don't see anything like either image. Resolution is better and no sign of artefacts. Is using VP9 codec.

How big is your screen? Can't see it easily on my 15.6" lappy from 2 feet away, easy to see it on desktop monitor. Maybe GPU has something to do with it too.

trig42

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#1679474 29-Nov-2016 14:25

I get the results with the interlacing like lines in it at 1080, it is perfect at 720.

Chrome Browser on Win 10. Playing in window.

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