Originally Posted by Oubadah
I'm thinking of getting this unit and using the dual HDMI outputs in the following way: Primary to TV and secondary to a small monitor so I can browse network files, radio etc. without turning on the main TV. Are there any potential issues I might face with this setup? For example, I'm wondering if I have 24p set for the TV and the monitor doesn't support that, will I get no image on the TV? Or maybe certain modes wont work on the TV because the Oppo detects that the monitor can't display them?
What's your plan for audio? Using the multi-channel Analog outputs?
To get a handle on this you need to understand the Dual HDMI Output setting -- choices Split A/V or Dual Display.
The first thing to understand is that even if you have the two outputs CABLED, if only ONE of them is "live" at the moment, then the Split A/V vs. Dual Display setting is ignored and best quality audio and video is negotiated on that one, remaining live connection according to what the device at the other end of that cable says it can accept during the HDMI handshake.
Making an HDMI connection "not live" could involved turning off that device or switching it temporarily to a different (perhaps not even connected) HDMI Input. Many modern HDMI devices keep their HDMI inputs "live" even when they are supposedly OFF -- in aid of doing things like HDMI CEC (remote control over the HDMI cable). Some devices will let you disable such stuff so that the HDMI inputs become truly "not live" when the device is turned "off".
If BOTH HDMI outputs from the OPPO are "live", then the Dual HDMI Output setting becomes important.
With Split A/V, the HDMI 1 output becomes muted for audio and negotiates best possible video with the device it is connected to (without regard to the device on the other cable). And the HDMI 2 output negotiates best possible audio with the device it is connected to without regard to what's on the HDMI 1 cable. The HDMI 2 cable also carries video -- HDMI audio can't exist without a video signal of some sort on the same cable -- but it is a "safe" video that will work with any devices that can accept the audio.
With Dual Display set, BOTH HDMI cables carry audio and video, but the quality may be reduced to what's acceptable in common. For more details see this article from OPPO's new Knowledge Base:
So a typical solution would be to use Split A/V with HDMI 1 going direct to your main display and HDMI 2 going to an AVR for audio, with the video output of your AVR going to the secondary display. You can turn off the main display and video will still go through the AVR to the small display.
Or, if you plan to use the Analog audio outputs, you can send HDMI 1 to your main display, HDMI 2 to your secondary display, and Analog audio to your pre-amp. If you set Split A/V then audio will be muted on HDMI 1 whenever the secondary display connection is "live". That's not a problem unless you want to be able to use built in speakers in the main display instead of those Analog audio outputs. When you want to do THAT you could switch to Dual Display (which may reduce video quality on the main display) or you could simply make the connection to the secondary display "not live" -- i.e, turn that one OFF.
Or, suppose you want your video feed to the main display go through your AVR so that OTHER source devices can also feed that display (selected via the AVR). In that case send HDMI 1 to the AVR and the output of the AVR to your main display. Cable HDMI 2 to your secondary display. Now as long as the secondary display connection is "not live" that works fine for audio and for video through the AVR to the main display -- regardless of the setting of Dual HDMI Output.
But when you turn on the secondary display, you have a problem. With Split A/V set, the audio is muted on HDMI 1 and so you no longer have audio. With Dual Display set you get audio on HDMI 1 but the quality of the video may be reduced depending on the characteristics of your secondary display (see that Knowledge Base article) to what both connections can handle. Note that even turning off the primary display won't change this since the HDMI 1 output is still "live" to the AVR for audio. So what to do? Well the simplest answer would be set Dual Display and use your secondary display to locate and start stuff playing. THEN TURN OFF THE SECONDARY DISPLAY! There will be a brief loss of output on HDMI 1 while things are renegotiated, and then best quality audio (and video) will resume on just HDMI 1.
So there are various different usage options depending on exactly what you want to do for audio connection, and what your intended usage pattern is for each display separately and/or the two of them together.
Note that your secondary display must be able to accept standard home theater video resolutions. Some small computer monitors won't work for that. It also needs to support "copy protection". Any display with an HDMI input will support copy protection, but if you get a small display with a DVI input (which would still be compatible with HDMI from the OPPO) it may or may not support copy protection (called "HDCP").