Devices > Video Cards, Monitors, Televisions, and Projectors
Video Playback (bluray) - Occasionally Jumpy
whoareyou:
Machine is dedicated to JRiver. I'll sometimes use browser while video is playing. I continuously switch from movie to movie and track to track via the menus. Perhaps it's the constant starting of new videos and moving between tracks? That's my wild guess.
But keep in mind that the video looks excellent. If I was really having a problem with dropped frames I'm fairly certain I'd notice it. As comparison, comparing 1080p playback between my oppo 205 & PC I can't tell the difference (maybe someone with better eyes). It's a very long time since I last tried PC video, and I'm truly amazed that I can get such high quality
And remember, my issue is the very occasional timed stutter that I described in previous post.
Meanwhile I'll configure present queue and see if that makes a difference. Also, I'll configure my TV's resolutions.
BTW - Perhaps you can explain a bit more about frame drop?
The overlay info shows 1 drop / 1.71 hours. Ok, that seems negligible.
So what does dropped frames / repeated frames represent?
Thanks for the help
tij:
1 drop in 1.71 hours refer to your video and audio clock deviation (they are not exactly same) ... madVR will drop one frame in 1.71 hoyrs to keep audio and video in sync
other drop frame indicates how many frames were drop because your GPU could not render that frame in time (maybe scalinng algorithm you chose is too complex for your GPU to handle)
for 30 frames per second contents ... madVR has 1/30=0.033s=33ms to render each frame ... if rendering takes longer ... that frame will be dropped
your rendering times are waaay within that limit (you actually using quite simple scaling algorithm ... there are higger quality available in madVR if your GPU can handle it)
to actual problem though ... if other programs you running together with MC try to update their windows while you watching movie full screen ... there will be stutter
for example ... if i run programs thay keeps tabs on exchange rates and uptates its window to show results, everytime that updates happen - madVR will stutter (minimizing it that program dont help ... only minimizing it to tray solves the problem)
so if you run something similar while watching mivie ... stutter will happen
EDIT: repeated frames are used when content frame rate does not match screen frame rates ... in your case this might be applycable https://yabb.jriver.com/interact/index.php?topic=117282.0
RoderickGI:
When activating the madVR OSD to debug video I always find it useful to start the video playing, display the madVR OSD, let the video settle, and then press Ctrl+R to reset the various measurements, and only then take notice of what the madVR OSD is showing.
That will clear up the initial dropped and repeated frames associated with starting the video, and give a better indication of what is going on.
I think these questions are pretty important. You should answer them Whoareyou.
--- Quote from: tij on February 04, 2020, 12:16:27 am ---PS. What GPU are you using?
PSS. Also it seems you playing 1080i ... I am not aware of Blu-ray with interlaced content ... can you confirm that what you playing is interlaced (otherwise it seems MadVR is trying to deinterlaced your progressive video)
PSS. If you could attached your MadVR setting.bin file too
--- End quote ---
This certainly sounds like a web page, or some other application that uses a display such as a browser, refreshing content.
--- Quote from: whoareyou on February 04, 2020, 08:09:38 am ---And remember, my issue is the very occasional timed stutter that I described in previous post.
--- End quote ---
But your method of clearing the issue, as described in the first post, probably wouldn't work if it was just a web page refresh. Although Chrome has been doing some weird stuff lately, and seems to be running a lot of processes for the number of tabs it has open. It could be the cause.
whoareyou:
--- Quote ---I think these questions are pretty important. You should answer them Whoareyou.
--- End quote ---
Thanks for that. Somehow I missed the questions - and they are important (Sorry tij).
--- Quote ---GPU
--- End quote ---
Nvidia 1650 Super
--- Quote ---.bin file
--- End quote ---
I'll have to get that at later time.
--- Quote ---PSS. Also it seems you playing 1080i ... I am not aware of Blu-ray with interlaced content ... can you confirm that what you playing is interlaced (otherwise it seems MadVR is trying to deinterlaced your progressive video)
--- End quote ---
This is the interesting one to me. I have no idea why it's being deinterlaced. I can't find anything (upstream?) that is configured that would cause this and the Blu-ray is definitely 1080p.
So based on that, I configured madVR settings to never try to determine if it should deinterlace, but I don't think I should have to do this.
So couple things about those dropped frames. The Ctrl-r refresh was key to getting to the bottom of this. Most of the dropped frames resulted from all the junk playing leading up to the main menu. And that's what the jpg that I attached in this thread represented.
Pressing Ctrl-r after the actual movie was playing then showed very few dropped frames.
Then, after configuring madVR to make sure it used progressive playback the dropped frames remained at 0.
So that's where I am. From what I understand about these stats, everything looks much better, but.....
it seems as though something is still off in that MadVR doesn't correctly recognize the progressive material.
But progress.
Thanks very much RoderickGI and tij !!!
You've both been very helpful.
Now, when I get a chance, I'll need to learn some more about MadVR.
tij:
Upstream in this case is LAV filter ... so LAV filter is telling MadVR content is interlaced
Use mediaInfo to look at tech properties of your video ... post it here if you want us to look at it ... if it’s really LAV at fault ... then maybe Hendrick can look at it ... after all he wrote that filter :)
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