25p and 50p in 1 project - best settings?

[Bart]

I have to mix 3 camera's (multi-cam edit) with different file-types. I'm wondering which project settings I should use. I'm not used to do this. I usually only work with my amateur-camera. So your advise is more than welcome.

You'll find hereby the data I found after importing all clips in GV Browser.

All cam's PAL 1920x1080 format, 4:2:0

Camera 1 (Canon 100?): 25p, MOV, CBR, [email protected]

Camera 2 (Canon ...?): 50p, AVCHD, H.264/AVC, VBR, [email protected]

Camera 3 (Canon EOS 5D mk III): 25p, MOV, CBR, [email protected], YUV 8

I guess I better convert all clips to HQ of HQX?

They used a flash to enable me to synchronise the footage ... not easy I guess but feasible ...
I'll also have to synchronise this with seperate audio. All without common timecode. Fortunately the musician (my son) will help with audio synchro.

I'm looking forward to your comments!

[NakedEye]

Choose a 25p project to edit in. For the 50p clip when you add it to the timeline right click on it and go to the time settings and choose nearest neighbour from the field options. Synch as normal. 25p and 50p timecode is actually the same. You will most likely get a little audio drift you will have to deal with from your separate audio given the different unlocked recording device clocks.

[Bart]

Thank you both!

[NakedEye]

Hi regardless of what Andrew says your external audio recordings will drift over time. This has nothing to do with your cameras having different frame rates but is due to the fact that your audio recorders will have different timings due to unlocked clocks. Unless of course you synchronized them with your cameras clock at record time.

[Bart]

Now that I know that the audio-recording needs special attention for sync, it will not be an issue. My son as a musician hears and sees the slightest difference.

So thank you for the warning.

[Liverpool TV]

Hi regardless of what Andrew says your external audio recordings will drift over time. This has nothing to do with your cameras having different frame rates but is due to the fact that your audio recorders will have different timings due to unlocked clocks. Unless of course you synchronized them with your cameras clock at record time.

Dave is totally correct. There are enough posts on this forum that prove it, and a simple Google will do so as well.

The only way to guarantee synchronisation, also as Dave had said, is to sync everything off one master, including any audio recorder.

Without a common sync reference, each recording device is generating its own clock. With audio, it's sample rate is derived from its internal clock. It's these separately un-synchronised clocks that will cause an issue at some point, as they drift out of time with each other. This drifting, can and does, vary depending on each recording unit.

[Liverpool TV]

I'm not talking about external audio recording, but about 50p source in 25p (or opposite) project . This won't affect audio sync. Syncing audio from different sources is a separate issue and unrelated to source/project fps.

No one has said otherwise, neither did Dave. He did quantify his comment with "This has nothing to do with your cameras having different frame rates but is due to the fact that your audio recorders will have different timings due to unlocked clock". He was very clear in what he was saying, as I was agreeing with him.

[NakedEye]

Hey Andrew! Maybe re read the original post from Bart. My response is directed at his whole post and not just the title.
Regards Dave.