Audio but no video on Nvidia GTX 970 4K 60HZ

Robale

Newbie Joined: Jul 11, 2015 00:51 Messages: 2 Offline

Solved by

Jul 11, 2015 01:01

I read about a gentleman having similar issues on a GTX 960. I am using PowerDVD on an HTPC hooked to a 4k TV. Using a GTX 970 and HDMI 2.0 at 4K and 60HZ. I have been trying to use it to pay back my DVR'd TV Show Library and I cannot get it to display video on a 4K tv. The files are 720P and 1080P H264 encoded. Disabling hardware acceleration makes no diffrence.

Oddly when I hooked up a 1080P monitor and dragged the application from the 4K TV to the 1080P monitor the video magically starts showing. Have tried cimema mode also and no luck. Got PowerDVD for the post proccessing of H264 HD video and the interface in Cinema mode. On a 4K TV other software isn't really useable due to the UI scale.

Are there any work arounds? Maybe if I rencoded the video files?

This message was edited 1 time. Last update was at Jul 11. 2015 01:03

nullack

Member Joined: Dec 29, 2010 04:09 Messages: 139 Offline

Jul 12, 2015 03:51

Your GTX 970 does support HDMI 2.0

However it uses an older video decoder that wont do full hevc hardware decoding

Make sure you have the latest patch from cyberlink cos the old version was bugged. You can download it from support / updates.

Then its good practice to do your geforce driver updates and general windows updates.

It should all work then.

Robale

Newbie Joined: Jul 11, 2015 00:51 Messages: 2 Offline

Jul 12, 2015 03:58

Everything is fully up-to-date (beta patch) and the GTX 970 has full H264/5 decoding plus latest nvidia drivers. Oddly I've found disabling deinterlacing then starting the video in desktop mode on the 1080p display then dragging to 4k works. Cinema does not though.

And yes I know it supports HDMI 2.0. It has to for me to be running a 4k display at 60hz... The GTX 900 series are Nvidias latest generation of cards and the only ones with HDMI 2.0.

This message was edited 1 time. Last update was at Jul 12. 2015 04:02

nullack

Member Joined: Dec 29, 2010 04:09 Messages: 139 Offline

Jul 12, 2015 13:38

If you only have the beta patch its not up to date. Cyberlink called the prod release the same version buts its not. You need the prod release not the beta release.