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Decklink mini recorder and Chromecast - only 720p?

https://forum.blackmagicdesign.com/viewtopic.php?f=18&t=67066

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Decklink mini recorder and Chromecast - only 720p?

PostPosted: Tue Nov 21, 2017 9:24 am
by Cedric Renouf
Hello,

I wonder why my decklink mini recorder only picks up the chromecast at 720p59??? I have an HDMI splitter in between that does the HDCP stripping just fine. The splitter itself is not to blame - if I plug in the Chromecast via the very same splitter to my TV I get 1080p60Hz input indication. Any idea why the mini recorder won't go above 720p?

One other thing - even if I take out the splitter altogether and plug in the Chromecast directly into the capture card, I get the black screen naturally, but the resolution is again being reported at the low, low rate of 720p59 ....what's up with that?!

Thanks!

Re: Decklink mini recorder and Chromecast - only 720p?

PostPosted: Tue Nov 21, 2017 12:40 pm
by Xtreemtec
If you have checked the specs of the Minirecorder you would have seen that the Mini recorder only supports up to 1080I60 and no P60. ;)

SD Video Standards
525i59.94 NTSC, 625i50 PAL

HD Video Standards
720p50, 720p59.94, 720p60
1080p23.98, 1080p24, 1080p25, 1080p29.97, 1080p30, 1080PsF23.98, 1080PsF24, 1080PsF25, 1080PsF29.97, 1080PsF30
1080i50, 1080i59.94, 1080i60

Re: Decklink mini recorder and Chromecast - only 720p?

PostPosted: Tue Nov 21, 2017 12:48 pm
by Cedric Renouf
Xtreemtec wrote:If you have checked the specs of the Minirecorder you would have seen that the Mini recorder only supports up to 1080I60 and no P60. ;)

SD Video Standards
525i59.94 NTSC, 625i50 PAL

HD Video Standards
720p50, 720p59.94, 720p60
1080p23.98, 1080p24, 1080p25, 1080p29.97, 1080p30, 1080PsF23.98, 1080PsF24, 1080PsF25, 1080PsF29.97, 1080PsF30
1080i50, 1080i59.94, 1080i60


Thanks, this all makes sense now. Any way I can downgrade 1080p60 to 1080p30 ?

Re: Decklink mini recorder and Chromecast - only 720p?

PostPosted: Tue Nov 21, 2017 12:56 pm
by Xtreemtec
With a scaler like Decimator MD-HX you can.. Or set your chromacast to output 720P is a far cheaper option. ;)

Re: Decklink mini recorder and Chromecast - only 720p?

PostPosted: Tue Nov 21, 2017 4:28 pm
by Cedric Renouf
Xtreemtec wrote:With a scaler like Decimator MD-HX you can.. Or set your chromacast to output 720P is a far cheaper option. ;)


Well, there's no way to set the chromecast output and there's no need - the 1080p60 is being picked up by decklink as 720p60.

Re: Decklink mini recorder and Chromecast - only 720p?

PostPosted: Tue Nov 21, 2017 7:39 pm
by Xtreemtec
It is not picked up as 720P. The EDID info tells the chromecast what resolutions it supports.. And the Chromecast adapts to the highest resolution / framerate that it can run based on the EDID info.

Your TV tells the Chromecast with it's EDID table it supports 1080P and so the chromecast goes into 1080P mode. ;)

Re: Decklink mini recorder and Chromecast - only 720p?

PostPosted: Wed Nov 22, 2017 3:31 pm
by Cedric Renouf
Xtreemtec wrote:It is not picked up as 720P. The EDID info tells the chromecast what resolutions it supports.. And the Chromecast adapts to the highest resolution / framerate that it can run based on the EDID info.

Your TV tells the Chromecast with it's EDID table it supports 1080P and so the chromecast goes into 1080P mode. ;)


gotcha. thanks!