I have been trying to capture screenshots of different movies at the original frame rate. I mean, for instance, if a movie is 30 fps and I capture 10 seconds I should get 10 x 30 = 300 screenshots. This works fine when the movie is medium or low resolution, like for instance 640x480, it works fine. When the movie instead is in HD it can't do the job. I think this is normal, I mean, it's expected, as it can't save 30 images of MBytes every second, at least my pc can't do that.
Is there a way to let the movie play slow and capture the screenshots accordingly to the speed? For instance, an HD movie @ 30 fps, if I let it play 10 times slower, and I set it to capture 3 screenshots per second, after finishing playing I would still get my 30 screenshots for second on whole. Am I correct?
I tried the option "rate=0.X", but if I set, for instance, "rate=0.3", it looks like it plays random speed, close to 0.3 but it doesn't seem consistent. The result is, after 10 seconds of real movie time, I don't get 300 screenshots, maybe I get 240 or so. Randomly.
How can I do this thing?
Basically, I need an automatic way which is equal to do, manually, "e" + "Shift s" in a continuous loop.
Thanks in advance
