Player won't resize on iOS when using Metal

[funniray]

Hey there,

I've been playing with the demo projects provided, but I don't seem to be able to get MPV to detect the metal layer resizing...
I've added the following to MPVMetalViewController

 override func viewDidLayoutSubviews() {
 let size = view.frame.size
 let scale = UIScreen.main.nativeScale
 
 metalLayer.frame = view.frame
 metalLayer.drawableSize = CGSize(width: size.width * scale, height: size.height * scale)
 }

I can see with the performance overlay that the metal layer has resized, however, the video content isn't modified.

Is there any way to get resizing to work with libmpv on iOS?

[alexiscn]

try following code

 override func viewDidLayoutSubviews() {
 super.viewDidLayoutSubviews()
 
 metalLayer.frame = view.bounds
 metalLayer.contentsGravity = .resizeAspect
 }

[funniray]

@alexiscn

The code did work and the view does fill the screen, however the metal layer's resolution never changed. I would prefer the resolution of the metal layer to be correct so that subtitles are rendered properly.

You can see in the clip below that the resolution of the metal layer never changed

RPReplay_Final1712320506.MP4

[alexiscn]

You may have a look the plex fix the sizing issue on moltenvk . It seems they have a solution to fix the problem. But I could not make it work.

[funniray]

After quite a bit of trial and error -- and trying the plex fork of mpv -- I don't believe it's currently possible. It doesn't seem like anything that Plex has published so far has had fully working moltenvk resizing... I've tried multiple commits, but nothing appears to work :/

[JARMourato]

@alexiscn @funniray were either of you able to get the layer to resize correctly when device rotates / orientation changes ?

[funniray]

was any of you able to get the layer to resize correctly when device rotates / orientation changes ?

Nope, I just ended up using openGL for iOS/macOS and then only using metal on tvOS as it's unlikely for a tv to resize.

[sunzongzheng]

@funniray Can openGL use vo=gpu-next?

[edde746]

I seem to have fixed this with these changes: edde746@e6b129f#diff-88a874cb4ea9c65426174bedfdd5e8db6112cf9407187a4aa1487082c84c78c5 (ignore the other files in this commit, they are unrelated)

But I won't submit a PR as I don't really know what I'm doing, it can probably be useful for solving this though.