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No way to set HDMI framerate to 50Hz causes judder #374

Closed GoogleCodeExporter closed 8 years ago

GoogleCodeExporter commented 8 years ago 
What steps will reproduce the problem?
1.Playing any 25/50FPS footage which is normal in Europe.
2.
3.

What is the expected output? What do you see instead?
Dropping frames causing video stuttering, audio is OK.

What version of the product are you using? On what operating system?
Latest Chromecast image.

Please provide any additional information below.
The same stuttering can be observed when the HDMI input MythTV is connected to 
is set to 60Hz. But MythTV is a Linux app and the framerate can be set to 50Hz 
which eliminates the problem.

Original issue reported on code.google.com by per...@gmail.com on 9 Sep 2014 at 12:35

GoogleCodeExporter commented 8 years ago 
The HDMI interface between TV and Nexus Player is auto negotiated to be 60 Hz. 
Fine as long as the streamed content being played is either 30 or 60 fps.

In Europe most commonly streamed content is 25 or 50 fps. When such content is 
being decoded by the nexus player the HDMI port frequency have to be adjusted 
automatically by the nexus player is self to either 25 fps or 50 fps. 2 sec 
black out has no impact on the experience as long as the video is not 
juddering. 

That's it. Without it, the product is simple not working as expected.

Original comment by and...@berken.org on 4 Dec 2015 at 2:16

GoogleCodeExporter commented 8 years ago 
I just want to mention that since the October OTA update, the nVidia Shield 
Android TV actually allows you to select the refresh rate:
"23.976/50Hz screen refresh selection" is noted as one of the new features on 
this page:
http://nvidiashieldzone.com/index.php/shield-android-tv/shield-android-tv-ota-2-
0/

Also some reviews are mentioning this:
http://hometheaterreview.com/nvidia-shield-4k-streaming-media-player-reviewed/

So at least nVidia got their act together and provided a solution in their 
version of Android TV. Now Google "just" has to fix it in their own product...

Original comment by Danny.S...@gmail.com on 7 Dec 2015 at 2:01

GoogleCodeExporter commented 8 years ago 
This is option in the new chromecast app

Original comment by n87...@gmail.com on 9 Dec 2015 at 9:32

GoogleCodeExporter commented 8 years ago 
Really? Where? Have they updated the app now? I looks like the latest version 
is from september 29...

Original comment by toreto...@gmail.com on 9 Dec 2015 at 10:20

GoogleCodeExporter commented 8 years ago 
http://www.apkmirror.com/apk/google-inc/chromecast/chromecast-1-13-13-android-ap
k-download/
https://dl2.pushbulletusercontent.com/uBQOL8mG8HIW0RHchUSGDGtQn3BWZaGD/Screensho
t_2015-12-10-00-37-06.png

Original comment by n87...@gmail.com on 9 Dec 2015 at 10:38

GoogleCodeExporter commented 8 years ago 
Looks promising! Does it work well? I'm waiting for the update.

Original comment by toreto...@gmail.com on 9 Dec 2015 at 11:09

GoogleCodeExporter commented 8 years ago 
That only looks like 50Hz. I only care about getting 24Hz.

Original comment by reinfa...@gmail.com on 10 Dec 2015 at 8:12

GoogleCodeExporter commented 8 years ago 
Chromecast now has 50Hz support. Please go to 
https://productforums.google.com/forum/#!topic/chromecast/Mj37qk5emKw to find 
out more.

Original comment by jonathan...@google.com on 10 Dec 2015 at 9:17

GoogleCodeExporter commented 8 years ago 
I have been plagued by these stuttering issues for absolutely ages now. Playing 
anything on BBC iPlayer has not been pleasant to watch, and the new All4 app is 
terrible. However, I can confirm that the new update (1.17.48342), and forcing 
the 50Hz mode, does restore natural motion. If you switch is back to 60Hz, it's 
all juddery again. This is all on a 2012 Samsung TV (all motion settings and 
enhancements off by the way). Now what's odd, my other 2 TVs in the house, both 
Sony's (one is quite old, the other is new this year), do not seem to have the 
juddery motion, and changing the 50Hz toggle doesn't seem to make any 
appreciable difference, whereas on the Samsung it's like night and day! So 
maybe there is also something to do with the TVs causing problems too?

Original comment by cnew...@gmail.com on 10 Dec 2015 at 9:36

GoogleCodeExporter commented 8 years ago 
Thank you! And Thank you again!

This is really good news!!  I made a small test and it works.

Original comment by jp.lycko...@gmail.com on 10 Dec 2015 at 9:59

GoogleCodeExporter commented 8 years ago 
Restricting comments on this thread so the resolution is easily visible to all 
interested.

Original comment by jonathan...@google.com on 10 Dec 2015 at 10:30