It may have nothing to do with the time conversion.

Quote from: Zeus on February 01, 2016, 21:47

It may have nothing to do with the time conversion.

Zeus, thanks for the reply. Could you please tell me whether or not it is a good idea to shoot night clip at 15p and then convert to higher frame rate? I was just experimenting but the results have confused me.

I don't think night footage has much to do with it. I'm wondering which of these you did, if you interpreted the 15 fps to 24 fps so that the final clip was sped up? Or you did some frame adding/blending to get a higher frame rate at a real time speed?

Peter, it was just a straight conversion from 15p to 25p. Please enlighten me because I don't really know much about video.

If you take each frame of a 15 fps (15 frames for one second) clip and play them sequentially on a 30 fps time line, (I'll use 30 because the math is easier) you can see that you are now needing 2 seconds of 15 fps to make up a second of 30 fps timeline. So the viewer sees 2 original seconds in a one second period. It is obviously speeded up. The quality would be good just time-lapsed.

But you could also ask the editor to play the 15 fps in a 30fps time line but keep the 15 fps in real time. Now there needs to be a frame added between every frame you shot to fill in the timeline to make it 30 fps. The quality here is iffy especially if the scene is rapidly changing.

Quote from: Freedom on February 02, 2016, 14:26

Peter, it was just a straight conversion from 15p to 25p. Please enlighten me because I don't really know much about video.

If you take each frame of a 15 fps (15 frames for one second) clip and play them sequentially on a 30 fps time line, (I'll use 30 because the math is easier) you can see that you are now needing 2 seconds of 15 fps to make up a second of 30 fps timeline. So the viewer sees 2 original seconds in a one second period. It is obviously speeded up. The quality would be good just time-lapsed.

But you could also ask the editor to play the 15 fps in a 30fps time line but keep the 15 fps in real time. Now there needs to be a frame added between every frame you shot to fill in the timeline to make it 30 fps. The quality here is iffy especially if the scene is rapidly changing.

Yes, it looked like time lapse. Thanks again!