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Frame Rate Questions

PostPosted: Sun May 06, 2018 7:15 pm
by LukeBrown1989
Hello! I have a few questions about FPS. I am coming over from FCPX and never had to worry about frame rates in the past. Through this forum, I've found that varying frame rates is a bad thing in DR. My camera at the moment is just my Samsung Galaxy S8+. I've learned that phones do not record consistent frame rates. Even though it promises 60fps, 30fps, or 25fps, it never is recorded consistently and frame rates are all over the place. I know that a phone is not ideal, but it's what I'm working with at the moment.

I didn't fully realize these issues until I started working on a music video this week. Recording the guitar track that comes in at 30fps and then recording a drum track that comes in at 25fps means that the tracks don't match up.

Questions:
1. Is there a program or app that can convert frame rates in a video while maintaining the timing? I tried Handbrake, but the video quality is not great afterwards, especially since it can't really handle 4k video.

2. If I simply add a 25fps video to the timeline and export at 30fps with DR, will the final video maintain the timing and be ok? Or will it be sped up? (I mean as a way to convert a single clip to 30fps and then re-import it to use with the other clip that is at 30fps to match up)

3. When we talk about consistent frame rates, can those vary AT ALL? Using mediainfo, I have found that even though the videos all says 29.970 in DR, they are actually 28.89, 28.90, 29.3, etc. Will these inconsistencies have a great effect as well?

4. Biggest question- what's the best way to handle having a bad camera in this situation? Is it with some sort of video converter? A completely different editor? Running single clips through DR and exporting at a specific frame rate to get everything consistent?

I'm very new to video editing and I have found that FCPX was definitely for beginners and was much easier on this front to use, but I like DR much better, especially since I recently built a PC and moved away from Apple and am looking for a great video editor.

Running DR15 Beta and Windows 10
32 Gb DDR4 2800 Mhz
Asrock x370 Taichi
Ryzen 1700x @ 3.5 Ghz
250 Gb SSD with operating system/programs and 1 TB SSD with media
GTX 1080 8GB

Re: Frame Rate Questions

PostPosted: Mon May 07, 2018 12:12 am
by Uli Plank
There are programs like ffmpeg which can convert your video into something like ProRes or DNxHD/HR and will not only fix the frame rate issue to some degree, but also make it easier on your hardware when editing. But watch out, they are bigger.

But you may run into sync problems. For music videos in particular smartphones are not a good option.