I record old Noir movies that are either played on TV or, more recently, streamed over the web.
For the ones played on TV, I use whatever frame rate Windows Media Center gives me in its recorded file. I have no control over that.
For those streamed over the web, I use a screen capture program to record the movie playing full screen from my monitor.
I have my screen recorder set to 30 fps. (In part because of the 60 Hz refresh rate of my monitor. Although my new monitor refreshes at 75 Hz.)
Yesterday I was checking to see how much compression I could get away with in HEVC. (I am at a ridiculous 1000 kb lately, although the image quality seem okay to me. (Viewing later on a 52" TV screen.))
I was stepping through a high motion segment of a (film) movie and I noticed a bunch of "smearing" of small, but detailed, areas, like eyes, mouths.
(I can post a screen shot if anyone wants to see.)
I initially thought that I had too much compression. But changing the compression to ridiculously high Quality settings (that is, not much compression) didn't change the smearing.
That got me thinking that perhaps the smearing was caused by me not matching the original source material (film) in my screen capture.
Now, here's where I get confused. Many of the later movies that are streamed are streamed from a Blu-Ray disc. (In fact, they must all be digitized because it's not like a Projectionist has to mount a film when you call it up on the web to watch it.)
I read that Blu-Ray has a frame rate of 24 fps to match (film) movies.
I presume that the way that Blu-Rays are made is that a special machine steps through a (film) movie a frame at a time, scans a frame, and moves on to the next. (As opposed to playing the movie on a screen and recording it from the screen, as is done on TV with old movies. (Which I presume needs telecine and produces extra (duplicate) frames.))
If so, then by me recording a 24 fps movie at 30 fps, it seems to me that I would be getting a telecine type effect, where I am getting an extra frame in occasionally?
I have compared two screen recordings taken at 24 and 30 fps and it seems to me that the 24 fps is slightly better. But then it's not a double blind test and I could just be fooling myself.
Is there a definitive answer as to what frame rate I should be using for screen capture of film movies streamed over the Net?
This message was edited 2 times. Last update was at Dec 19. 2020 11:52