More > JRiver Media Center 29 for Windows
JRVR Status, Plans and Upcoming Changes
mattkhan:
thanks for the detailed explanation, a few comments on specific points
--- Quote from: Hendrik on June 16, 2022, 10:47:03 pm ---The Advanced option Aspect Ratio Correction gives you the ability to have a global always-on option to influence the image aspect ratio in a certain manner, eg. exactly compensate for your lens ratio - and in a safer manner too, independent of the videos actual content or aspect ratio.
It was originally designed for older anamorphic screens, but those exhibit the same properties as using a lens.
Overall this would be the best option to use - of course that falls apart when you are talking about per-video usage, more below.
--- End quote ---
OK I see, so this would be a good option for someone who uses a lens fixed in place (no sled)
--- Quote from: Hendrik on June 16, 2022, 10:47:03 pm ---Do you actually modify the lens settings manually, or did you use madVRs automation for that? I'm not sure if we would re-create something like that anytime soon.
--- End quote ---
I use a madvr profile
--- Code: ---if (AR > 2.2) "ana"
else "normal"
--- End code ---
which applies a 4/3 stretch factor + automated black bar detection to eliminate the bars. This works well (except for films with multiple aspect ratios which I find hard to find a good balance of settings for)
The lens is moved into place via a change to the installation mode on the projector which signals the sled via a 12v trigger. This could be automated but I do it manually atm.
--- Quote from: Hendrik on June 16, 2022, 10:47:03 pm ---Guess I'm back to working on profiles as the next thing, and we can make use of those later for all these things. The conflict of zones with audio settings is why I want to do JRVR profiles independent of zones in the first place, because zones are rather rigid and should probably mostly remain relegated to audio or high-level settings outside of JRVR's domain.
--- End quote ---
do you think it's worth asking jmone to make changes to SOT now to populate the playback info field or is it best left til after this work is done to see how things settle?
Hendrik:
--- Quote from: mattkhan on June 17, 2022, 03:03:30 am ---I use a madvr profile
--- Code: ---if (AR > 2.2) "ana"
else "normal"
--- End code ---
which applies a 4/3 stretch factor + automated black bar detection to eliminate the bars. This works well (except for films with multiple aspect ratios which I find hard to find a good balance of settings for)
The lens is moved into place via a change to the installation mode on the projector which signals the sled via a 12v trigger. This could be automated but I do it manually atm.
--- End quote ---
The settings profile we'll be able to have as well. I was more interested in the change to the lens itself, which madVR can theoretically automate in some fashion, but we might not easily get that.
--- Quote from: mattkhan on June 17, 2022, 03:03:30 am ---do you think it's worth asking jmone to make changes to SOT now to populate the playback info field or is it best left til after this work is done to see how things settle?
--- End quote ---
Long term I would probably write the black bar detection information into a separate field, and then optionally apply it during playback with an option. But if you want to get ahead of that development, writing the right cropping info into the Playback Info field would certainly work and get you going relatively quickly.
mattkhan:
--- Quote from: Hendrik on June 17, 2022, 03:20:43 am ---I was more interested in the change to the lens itself, which madVR can theoretically automate in some fashion, but we might not easily get that.
--- End quote ---
madvr does have support for activating a lens memory on profile change but I don't use it, partly because I have to have ability to change the mode without using madvr (for streaming sources) so i think it's simpler for other people in the house to change the lens mode in the same way for all content rather than have it automated in some cases but not others.
mykillk:
JRVR is great!! The image quality performance is comparable to MadVR but rendering performance is definitely better.
My request at the moment is a film grain filter. Film grain tends to be one of the first things that video compression averages out to increase ratios, and I find that without grain the image just doesn't look right. Being able to add film grain back in with MadVR was one of my favorite features.
Ok actually two requests. Displaying the video frame rate in the OSD would be helpful to be confident the refresh rate has been matched up correctly.
armyplace:
--- Quote from: Hendrik on June 16, 2022, 10:17:09 am ---Actually, starting to look into how we do aspect ratio handling, it seems we already support anamorphic displays, it is just not named very well for this purpose, and hidden a bit.
Options -> Video -> Advanced -> Aspect ratio correction
Below you'll find the scale factors available right now, which we can easily extend if needed
No change: 1.0
1.33 to 1.78: 1.333..
1.33 to 1.60: 1.20
1.78 to 2.35: 1.321875
1.78 to 2.40: 1.350
The actual aspect ratios and factors it lists are just descriptive, it all turns into this one scale factor. So if your lens is setup to scale 16:9 (1.78) to cinemascope 2.40, there is an option ready to use there.
Combine that with the "Aspect ratio mode" option right below and you have a lot of control already (eg. setting it to Crop would let it fill the screen). Let me know if this works?
Ideally these should be per-screen settings in JRVR, but the entire aspect ratio/zoom handling is generic MC stuff that predates it, so that might be a change for later. But most people with dedicated projector setups likely don't mix and match much, or could use zones to deal with it.
--- End quote ---
I tried this the other night and for me it, aside from it one or 2 glitches where it just didnt work (needed to quit and replay the file), it works very well. I have my anamorphic lens (ISCO IIIL) in place 100% of the time on a scoped screen, so now it looks okay for 16:9 content and works best for 2:35 aspect ratios.
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