Devices > Video Cards, Monitors, Televisions, and Projectors
Dropped frames after changing projectors
curiousMonkey:
The DVD is a TV show (NYPD Blue).
Here is the data from 23Hz.
tij:
Use MC to switch to correct refresh rate
options->video->display setting->display setting automatic change mode: ON
PS. if its TV show ... very likely its actually 29.97 (especially so old show) ... i bet it is still jumpy at 23fps
wer:
The dropped frames are happening because you are playing something madvr thinks is 29.97fps with your display set to 24fps.
Actually, a lot of TV shows are shot on film, and are put on DVD at their original framerate, but with duplicated frames to pad the framerate to 29.97fps. The X-Files and Magnum PI are this way: they are natively 23.976. Not sure about NYPD Blue.
There are two ways to fix this, the easy way and the good way.
Easy way: Set the display rate to 29.97. The dropped frames will stop. (You may see the occasional stutter because of repeated frames). If you then see "Repeated Frames" constantly increasing in your MadVR display, switch to the good way:
Good way: If you check the video with MediaInfo, it may report the frame rate as 23.976 or 24fps, or it may explicitly say the video is progressive. Another way to tell is if the video shows constantly increasing "repeated frames" when played at 29.97. To fix this, set the "FPS" tag in MC to be the same as the frame rate indicated in media info, either 23.976 or 24. If your display rate is set to the same rate, you will get perfect playback with no dropped frames. You will see the content as originally shot with no stuttering.
Occasionally you may need to force FILM mode if you see any artifacts in the picture. Google madvr film mode. You can do this by adding DEINT=FILM to the filename of the video, or by using MadVR profile rules.
Almost all MOVIES on DVD require 23.976/24 fps playback to display perfectly. I have only a handful that are hard-interlaced and require 29.97. For TV shows on DVD, it's more of a mixed bag. A lot use 23.976/24, but a significant number are hard interlaced and require 29.97 since they were shot on video. You have to test to be sure.
I've dealt with this issue a lot, but this is a more complete answer to your issue, if you're willing to but a bit of extra effort in to get perfect playback.
curiousMonkey:
I changed the video mode to 23.976 FPS and set auto change mode to ON.
Now I can see that the DVD file is played back with a frame rate of just under 60Hz.
The only remaining problems are that it takes the projector about 10 seconds to resync to the new frame rate (audio after 3 seconds) and occasionally the video freezes when I play the first file at 59.94 Hz.
wer:
--- Quote from: curiousMonkey on September 18, 2020, 01:08:53 pm ---I changed the video mode to 23.976 FPS and set auto change mode to ON.
Now I can see that the DVD file is played back with a frame rate of just under 60Hz.
The only remaining problems are that it takes the projector about 10 seconds to resync to the new frame rate (audio after 3 seconds) and occasionally the video freezes when I play the first file at 59.94 Hz.
--- End quote ---
Please take another look at my post.
--- Quote ---I changed the video mode to 23.976 FPS
--- End quote ---
What exactly do you think you did? Because you didn't change the FPS tag of the file. You shouldn't change your desktop refresh rate; let MC deal with that. Maybe you were trying tij's experiment.
The line in the MadVR display that ends in "(says source filter)" indicates the file is still tagged as 29.97.
If you change the FPS tag of the file, MadVR will show that value in that line of the display. E.g. "movie 23.976fps (says source filter)"
You need to have "Display Settings Automatic change mode" set to ON to be able to properly play files at different frame rates. You say you've done that.
Now you need to ensure you set the FPS tag for the file correctly. If "Repeated Frames" is constantly growing, the file FPS should not be set to 29.97, it should be set to 23.976 or 24.
If MadVR sees a file set at 29.97, as yours currently is, it's normal behavior is to run the display at 59.94 (which is exactly twice the framerate of the file). That is not a problem.
So, with the settings you now have, are you seeing "repeated frames" constantly increasing or not?
Or are you still seeing "dropped frames" constantly increasing?
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