Adrian Tan
May 1st, 2015, 01:53 PM
So, this mystifies me. I've done a few tests, but I'm still not sure what's going on and was wondering if someone actually knew. I'm having trouble finding info online.
Say I create a 25fps timeline. I drop 25fps clips on it, all well and good.
Now I drop a 24fps or 30fps clip on it. Somehow, Premiere automatically processes the clip to maintain duration. So, if the 24fps clip is exactly 1 second long, it'll still be exactly 1 second long in the 25fps timeline. Ditto with the 30fps clip.
So what exactly is it doing? Anyone know?
It seems to me what it could be doing is: speed change, interpolating frames, dropping frames, doubling frames, or some mix of the above. With the 24fps clip I tested, just clicking forward frame by frame, it seemed the first frame of each second got doubled. With a 10fps clip, it looked like some frames got doubled and some got tripled, but perhaps this was a speed change. With a 30fps clip, I'm assuming interpolation is involved on every third pair of frames or something like that, rather than speed change or dropped frames.
Say I create a 25fps timeline. I drop 25fps clips on it, all well and good.
Now I drop a 24fps or 30fps clip on it. Somehow, Premiere automatically processes the clip to maintain duration. So, if the 24fps clip is exactly 1 second long, it'll still be exactly 1 second long in the 25fps timeline. Ditto with the 30fps clip.
So what exactly is it doing? Anyone know?
It seems to me what it could be doing is: speed change, interpolating frames, dropping frames, doubling frames, or some mix of the above. With the 24fps clip I tested, just clicking forward frame by frame, it seemed the first frame of each second got doubled. With a 10fps clip, it looked like some frames got doubled and some got tripled, but perhaps this was a speed change. With a 30fps clip, I'm assuming interpolation is involved on every third pair of frames or something like that, rather than speed change or dropped frames.