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Beginners Guide To Syncing Audio
#1
Hello all,

Would really like to start syncing LD/DVD audio tracks to Blu-ray's but am very much a novice so was hoping some of the experts on here could help.

I've read that Reaper is a good tool to use but could use some guidence on how to go about it or if there's a better (easier!) program to use.

Got a lot of projects I want to work on so any tips/advice greatly appreciated!
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#2
As an old dinosaur as I am, I continue to use old free softwares - "if ain't broken, don't fix it!" philosophy! Wink

Audacity: free, open source, quite easy, it does the job.
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#3
Haha, nothing wrong with that philosophy!

I already have Audacity for music editing but have limited experience with it. Do you put both tracks beside each other and try to match the track you are trying to sync to the blu-ray track?

If anyone has come across a helpful user guide please let me know
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#4
(2017-04-23, 07:07 PM)alexpeden2000 Wrote: Do you put both tracks beside each other and try to match the track you are trying to sync to the blu-ray track?

Yep!

Another easier (to me, at least) method is to use avisynth; you must have at least the video you want to put the audio in sync, and the video and audio to be synchronized; then just put in sync the video (cutting frames, or adding eventual black frames with no audio) and you will get, consequentely, audio in sync as well...
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#5
How do you do that?
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#6
(2017-04-23, 08:29 PM)spoRv Wrote: Another easier (to me, at least) method is to use avisynth; you must have at least the video you want to put the audio in sync, and the video and audio to be synchronized; then just put in sync the video (cutting frames, or adding eventual black frames with no audio) and you will get, consequentely, audio in sync as well...

That sounds relatively simple in principle but I have no experience with avisynth - is it the sort of thing that can be learned by a beginner?
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#7
OK, I should warn everyone: avisynth is a nightmare, for a beginner!!!

Said so, luckily this task is one of the easiest to make with it, so any absolute beginner, with a bit of patience, would be able (in theory) to put a soundtrack in sync with video; it's just a matter of "trim" commands, that's all... easy, huh? Wink

Example:

trackA is the main one, trackB is the one to put in sync

trackA video |01|02|03|04|05|06|07|08|09|10|11|12|13|14|15|16|17|18|19|20|
trackA audio |01|02|03|04|05|06|07|08|09|10|11|12|13|14|15|16|17|18|19|20|
trackB video |01|02|03|04|05|XX|XX|06|07|08|09|__|11|12|13|14|__|16|17|18|19|20|
trackB audio |01|02|03|04|05|XX|XX|06|07|08|09|__|11|12|13|14|__|16|17|18|19|20|

XX are frames not present in the trackA, while __ are missing frames... so, you have to remove XX frames, and replace __ frames from trackA; when in sync, they will be as following

trackA video |01|02|03|04|05|06|07|08|09|10|11|12|13|14|15|16|17|18|19|20|
trackA audio |01|02|03|04|05|06|07|08|09|10|11|12|13|14|15|16|17|18|19|20|
trackB video |01|02|03|04|05|06|07|08|09|10|11|12|13|14|15|16|17|18|19|20|
trackB audio |01|02|03|04|05|06|07|08|09|10|11|12|13|14|15|16|17|18|19|20|

got the point?

I usually use this method, and going with Audacity when something more to the audio should be made.
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#8
Avisynth looks really complicated!

I've done syncing in Premiere. Add the audio track and make cuts where it's out of sync and adjust. Checking for sync on sound effects or letters like t and p, where you can really see if it's off helps. Also if you have the bluray or DVD audio on one track and the laserdisc on another, you can compare the waveforms or prominent sounds for placement and make adjustments.

For any portions that are too short and require a clip to be stretched, I would export to wav, stretch with audacity, and import back to Premiere. Premiere's built in time stretching is nowhere near as good as audacity and degrades the audio when you select "preserve pitch".
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#9
Think I'll give Audacity a try first and see how I get on. Premiere sounds good but I would probably need to upgrade my PC - only have 4gb of RAM currently and I assume you need a graphics card beyond the normal Windows one?
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#10
I use Premiere as it's what I usually edit video in, you can use whatever. As long as you can see the video and the waveform you're good to go.
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