Lipsync

LKB

Newbie Location: Lexington, MA Joined: Dec 09, 2010 16:42 Messages: 5 Offline

Solved by

Dec 09, 2010 16:55

Hi,

I'm using PD9 on a fairly recent desktop PC, with Vista, NVidia graphics card, ~2GHz clock, virus turned off, PD priority high etc etc.

I have a HD video clip and a separate audio clip I'm attempting to synchronize. Ideally, I'd simply move the audio clip to line up with the clapstick's video event. But every time I play the clip, the video timing is different, apparently because the rendering speed doesn't keep up with the frame rate.

So I must produce the unsync'd clip, check the sync error, go back to edit the audio/video timing and repeat until I'm exhausted or perhaps the timing is close enough.

There's gotta be an easier way. Can I show the preview video with less resolution to get everything sync'd and then produce in HD?

BTW, this only works if the crystal timebase in the Canon HD camera is very close to the crystal in the Zoom audio recorder, happily they're fine even with a 25 min. clip.

LKB

Newbie Location: Lexington, MA Joined: Dec 09, 2010 16:42 Messages: 5 Offline

Dec 09, 2010 17:55

I just read another user with the same issues. Audio conversion from MP3 to WMA was recommended to ease audio decoding. But I'm using .wav audio...

...L

gbainbridge

Newbie Location: United Kingdom Joined: Dec 03, 2010 13:46 Messages: 42 Offline

Dec 11, 2010 10:14

Are you talking about the preview, or does the rendered edit also vary?

Im interested in this as I often dub my videos in another program, then I will want to transfer the completed soundtrack back into the editor.

Let us know if you find a solution.

Gary.

BarryTheCrab

Senior Contributor Location: USA Joined: Nov 06, 2008 22:18 Messages: 6240 Offline

Dec 11, 2010 10:19

I have sometimes made a low-res "substitute" file so it will play on-time, and I can add SFX, etc, and retain good timing.
Perhaps that is part of your solution. HP Envy Phoenix/4thGen i7-4770(4@3.4GHz~turbo>3.9)
Nvidia GTX 960(4GB)/16GB DDR3/
Canon Vixia HV30/HF-M40/HF-M41/HF-G20/Olympus E-PL5.
Tape capture using 6 VCR, TBC-1000, Elite BVP4+, Sony D8 camcorder with TBC.
https://www.facebook.com/BarryAFTT

LKB

Newbie Location: Lexington, MA Joined: Dec 09, 2010 16:42 Messages: 5 Offline

Dec 11, 2010 13:07

gbainbridge, the rendered edit is OK.

baryddth, making a low-res substitute file looks like a workaround. How do I do this?

...L

BarryTheCrab

Senior Contributor Location: USA Joined: Nov 06, 2008 22:18 Messages: 6240 Offline

Dec 11, 2010 18:51

Instead of rendering a full-scale HD project, make the identical video, but to itty-bitty scale.
Instead of 1080, choose any format at, perhaps, ZUNE standard quality (320x240), or similar.
You will have the same video, but smaller, and it will run perfect in the preview screen.
Use that crappy rendered file as your template for music, SFX, voice-over, whatever, but do it in as a new project.
Now, when you are satisfied, lock everything but the video-track, and then delete the low-res-video.
What you have left is the SOUND you put in.
Render that project as AUDIO only, then place your new AUDIO file into your original project, and viola, it should fit/match perfectly. Sometimes, quality work takes time.
HP Envy Phoenix/4thGen i7-4770(4@3.4GHz~turbo>3.9)
Nvidia GTX 960(4GB)/16GB DDR3/
Canon Vixia HV30/HF-M40/HF-M41/HF-G20/Olympus E-PL5.
Tape capture using 6 VCR, TBC-1000, Elite BVP4+, Sony D8 camcorder with TBC.
https://www.facebook.com/BarryAFTT

LKB

Newbie Location: Lexington, MA Joined: Dec 09, 2010 16:42 Messages: 5 Offline

Dec 14, 2010 10:56

So the workaround is pretty tedious. Things CyberLink could do to help:

1. Specify a hardware configuration that handles HD video without variable timing.

2. Add a switch to preview in low resolution.

Where do we deposit the suggestion?

...Larry

BarryTheCrab

Senior Contributor Location: USA Joined: Nov 06, 2008 22:18 Messages: 6240 Offline

Dec 14, 2010 11:23

Are you aware that your preview has 5 quality settings?
I think I missed that suggestion, under the preview screen there is a series of icons, 3rd from right is a little square, click on that adjust your preview quality. HP Envy Phoenix/4thGen i7-4770(4@3.4GHz~turbo>3.9)
Nvidia GTX 960(4GB)/16GB DDR3/
Canon Vixia HV30/HF-M40/HF-M41/HF-G20/Olympus E-PL5.
Tape capture using 6 VCR, TBC-1000, Elite BVP4+, Sony D8 camcorder with TBC.
https://www.facebook.com/BarryAFTT