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Old 01-12-2018, 02:12 PM   #121
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OK I got an LG TV which runs at 3840 x 2160 @ 30 Hz. Testing with a mid-2014 RMBP via HDMI.

The motion seems smooth when running fullscreen on it, but I did notice that on the release versions there is considerable shearing, vs on a local build (which may come down to compiling with the macos 10.6 SDK vs the 10.13 SDK). Doing more research and experimentation...
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Old 01-12-2018, 02:15 PM   #122
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Quote:
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OK I got an LG TV which runs at 3840 x 2160 @ 30 Hz. Testing with a mid-2014 RMBP via HDMI.

The motion seems smooth when running fullscreen on it, but I did notice that on the release versions there is considerable shearing, vs on a local build (which may come down to compiling with the macos 10.6 SDK vs the 10.13 SDK). Doing more research and experimentation...
Yes shearing is what happens for me at higher resolutions. Like you are occasionally getting half of one frame and half of the next.
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Old 01-12-2018, 04:00 PM   #123
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Edit: ran into some snags, figuring out the best solution, stay tuned!

(the issue seems to be that linking with a macOS SDK older than 10.7 disables OpenGL 3.2 support, which appears to be necessary for decent performance on 4k displays).

Last edited by Justin; 01-12-2018 at 06:26 PM.
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Old 01-12-2018, 08:41 PM   #124
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OK try 5.71pre12-clang
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Old 01-12-2018, 11:07 PM   #125
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Quote:
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OK try 5.71pre12-clang
Thank you again for having a go at this. But the issue is still there I am afraid. I can't see any video performance improvements here.

In the reaper.ini file "refresh_ms=default (default is 10, can specify interval in milliseconds, 1 is fastest)"

that code is missing now. Is that OK ?
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Old 01-13-2018, 02:27 AM   #126
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Try adding back that.
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Old 01-13-2018, 02:42 AM   #127
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Try adding back that.
Where do I add that? I mean which line?
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Old 01-13-2018, 02:56 AM   #128
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So add back:

Code:
refresh_ms=1
to reaper.ini.


Also, if you previously added the whole line, exactly how Justin wrote it:

Code:
"refresh_ms=default (default is 10, can specify interval in milliseconds, 1 is fastest)"
That wouldn't have worked at all (AFAIK), because it has those all extra characters in parentheses.
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Old 01-13-2018, 02:57 AM   #129
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So add back

refresh_ms=1

to reaper.ini
I mean to which line of the code ? Does that matter ?
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Old 01-13-2018, 02:58 AM   #130
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No, just add it on the second line, below [REAPER].
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Old 01-13-2018, 03:18 AM   #131
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Quote:
Originally Posted by EvilDragon View Post
No, just add it on the second line, below [REAPER].
Ok..I added ..But that doesn't help either. Also Reaper v5.71 pre12/64 is very unstable. Its playback is very jittery. When I hit play..it says "Buffeting" and doesn't start playing for a while before it starts playback and my buffer settings is not that large only 512.
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Old 01-13-2018, 07:25 AM   #132
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Quote:
Originally Posted by svijayrathinam View Post
Ok..I added ..But that doesn't help either. Also Reaper v5.71 pre12/64 is very unstable. Its playback is very jittery. When I hit play..it says "Buffeting" and doesn't start playing for a while before it starts playback and my buffer settings is not that large only 512.
Just to confirm, you're using 5.71pre12-clang/64?

Does 5.71pre12/x64 have the same buffering on playback start?
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Old 01-13-2018, 07:27 AM   #133
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Quote:
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Just to confirm, you're using 5.71pre12-clang/64?

Does 5.71pre12/x64 have the same buffering on playback start?
Oh No..I am not using Clang. Where is the link for it ? I didnt find that in the pre release folder. i was using the 5.71pre12 and when i edited the ini with what evil dragon said then it started making that playback issue..
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Old 01-13-2018, 07:28 AM   #134
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Oh Yes..Now I see clang..My bad!!! I didnt see it properly. Let me try that now..
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Old 01-13-2018, 07:57 AM   #135
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Oh yes !!! That did it !. Clang is the one !!! Now i dont see any shearing. Shearing is gone completely. But when zooming in and out on the edit timeline while playing..the video doesn't refresh properly. also while performing actions like "forward a bit" and "rewind a bit" the video is not smooth. I even tried it with a pro res file. The forward and rewind performance is actually the same in a compressed H246 file and a pro res file (which makes me think that if you tweak this a bit more..you could get great video performance even with a compressed footage). But you are definitely on the right track..I can certainly see the light at the end of the tunnel !!!..

Can these things be sorted out ? Can you pls take a look at this further and iron out these smaller issues too !! You Sir...are truly my saviour !!!
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Old 01-13-2018, 08:02 AM   #136
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How's it during normal playback?

The other things you describe are likely unrelated...
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Old 01-13-2018, 08:05 AM   #137
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Quote:
Originally Posted by Justin View Post
How's it during normal playback?

The other things you describe are likely unrelated...
Shearing is gone for me too now even at full screen with clang version. Thanks.

I compared it to MacOS native preview playback at full screen and it looks pretty much the same to me now.
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Old 01-13-2018, 11:28 AM   #138
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Quote:
Originally Posted by Justin View Post
How's it during normal playback?

The other things you describe are likely unrelated...
I have done some extensive testing with the clang pre release with different types of videos..some pro res, some, H264, Some DNX HD, some MJPEG, MKVs, MOVs, MP4s etc with different decoder settings (VLC, AV Foundation, QT, FFMPEG). One good thing is that the shearing is completely gone. The video playback is generally good. But I feel the general graphics performance has taken a hit. Here are the issues I have with the clang version

1. Forward a bit and rewind a bit definitely doesn't refresh the videos as it use to do in the older versions (Though I had the shearing issue earlier, forward a bit and rewind a bit worked perfectly with smooth video refreshing. It was almost like fast forwarding a tape deck. Thats the kind of performance I got earlier).

2. The entire graphics performance seems to be slowing things down. This is very obvious when "zoomed in " in the timeline. When I perform actions like zooming in and zooming out in the edit window while playback, the video stops for a few seconds and then resumes play though the playback isnt stopped. Hitting save while playback is also making the video stop for a few seconds before resuming play again.

3. When I tried to search through actions list the displaying of search results was slow which was never a case with previous versions of reaper.

All these could be related to the graphics issue or it could be completely different like you said. I will leave that to you since you are the best person to judge that.

I have linked a screen recording here about this where you will see how slow the searches appear in the actions window.This might help you to better identify the issue at hand.


https://www.dropbox.com/s/0phvpo2qmq...eaper.mov?dl=0


CPU Usage : CPU usage is very low while general playback, on a heavy project (more than 85 tracks with audio material for over an hour continuously in the timeline) with a lot of take fx and plugins, reaper only uses around 8 percent of CPU. But while performing actions like forward a bit, rewind a bit or zooming out and zooming in or hitting save or resizing a plugin window or any other window (including the performance meter window) the CPU usage spikes more than 35 percent (not only in a heavy project but also in an almost blank project only with one video item) and thats when the video freezes for more than a few seconds and then resumes playback. When the normal playback resumes the CPU usage drops down back to 8 %. These things never happened to me on older versions running the same projects.

What do you think about this ? Could this be graphics related ?

Last edited by svijayrathinam; 01-13-2018 at 11:40 AM.
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