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Old 29th September 2022, 01:49   #41  |  Link
quietvoid
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Oh, yeah. On 1st party products like Fire TV we have an option to always set HDMI to the frame rate of the content being played.
I'm not sure if you're aware but even FireTV devices don't properly do integer refresh rates.
So while the OS says it's sending 24.0 fps content (such as Rings of Power), it's actually playing at 23.976.

At least that's for the 4K sticks, there are a lot of complaints about this on forums.
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Old 29th September 2022, 23:29   #42  |  Link
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I'm not sure if you're aware but even FireTV devices don't properly do integer refresh rates.
So while the OS says it's sending 24.0 fps content (such as Rings of Power), it's actually playing at 23.976.

At least that's for the 4K sticks, there are a lot of complaints about this on forums.
That's news to me. I use a Fire Cube personally, which seems to do it the right way.
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Old 30th September 2022, 11:47   #43  |  Link
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It was not so long ago that the AppleTV 4K also had the same problem, but it has since been fixed in some tvOS release. I guess that for some manufacturers, true 24p is too rare to worry about..
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Old 1st October 2022, 04:20   #44  |  Link
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It was not so long ago that the AppleTV 4K also had the same problem, but it has since been fixed in some tvOS release. I guess that for some manufacturers, true 24p is too rare to worry about..
And it requires all devices on the HDMI chain to support it.

I hope we can kill fractional frame rates during my lifetime. We've pretty much got interlaced deprecated for new premium content.
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Old 1st October 2022, 05:38   #45  |  Link
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Excellent. And on what device(s) were you watching?
LGC9 77inch OLED - Using Prime Video from the LG app store.

I don't think it's an issue with the app though because it played the first 4 episodes flawlessly, and I've watched other Prime content on here with flawless 24p playback. From my limited time encoding, I've never seen any encode where it manipulated frame sync or frame rate. Unless the encode wasn't using the source frame rate. But even then it was only in specific spots of the show that is replicable every time. I wonder if they did it in post-production to give more pressure to the scene? Or actually, is just a streaming bug?

I've thought of a movie that did this too, Mad Max Fury Road. It broke 24p playback in many scenes. My thoughts on this is that the native frame rate could not be pulled-down to 24p. I wonder if any scenes were filmed in a frame rate that was not divisible by 24?

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Old 8th October 2022, 20:17   #46  |  Link
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In the latest FireTV Stick 4K Max update I just got, Dolby Vision CMv4.0 metadata seems to work now.
As Rings of Power's grading makes uses of that, now it works. Very cool.
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Old 11th October 2022, 03:44   #47  |  Link
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I don't know if it still applies to APV but APV has 2 video streams for (probably) each resolution. ABR/CBR and VBR. VBR is usually the better one. For most of the scene, VBR is better because it can pump double the average bitrate. And on lower bitrate scene where ABR get higher bitrate, it sometimes still look worse than VBR.
ABR stream is usually set at 10mbps for 1080p and VBR has results of 7-ish mbps and somewhat you can't tell which is which in normal APV player, you have to download it with some shady tool that pirate uses to rip the stream.
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Old 12th October 2022, 05:54   #48  |  Link
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The LGC9 actually just received an update. I haven't checked out the offending episode, but I just watched the most recent 2 episodes and frame rates were flawless. I'll try and check out episode 5 again I believe it was for FPS stutters.
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