Rate My Syncing :)

[metalfex]

I know how to author dvds and all, so now I took it one step further and decided to learn how to add multiple audio channels. I took Sailing Home's 2007 Athens Video, and added LM audio to it (this was my first project involving multiple audio streams) and I don't think I did that bad.

Here are the video clips:

Original Audio: http://www.youtube.com/watch?v=YfzhVIaXmKk

Live Met Audio: http://www.youtube.com/watch?v=1NgcZD4IUwM

Both original and live met mixed audio: http://www.youtube.com/watch?v=ert1-Wqczdk


I just want to take a moment and write down the steps I did so perhaps a person who has experience can tell me if I did something wrong or whether I should have converted the audio to xxx bitrate...


- First what I did was I used DVD Audio Extracter and ripped the audio from the DVD with these settings:
WAV - PCM Uncompressed Wave, Sample Rate '48000 HZ', Channel 'Stereo', Bits per sample '16 bits'

- Then I took the live metallica audio song 'one' in mp3 format cause I don't have it in loseless

- I then opened up audacity and put the LM and original audio into one project and trimmed it to fit and match the audio (it took a long time but I wanted to make sure it matched and did not echo or go outta sync) The total running time ended up being 6:40 (it was first 8 minutes)

- I saved the LM synced audio as WAV. Then I right clicked on the file i saved and on properties it shows me this:
Audio format = PCM
Audio Sample Rate = 48 khz
Channels = 2 (stereo)
Audio sample size = 16 bit
Bit rate = 1536kbps

- I then made 3 different audio files: One was original audio, 2nd was LM audio, and third was when I mixed both LM and original, in audacity on the bottom it said project rate: 48000

- I opened the dvd with tmpgenc and use the cut tool to cut out all the songs except one, and saved one as a new dvd

- I then opened up the new dvd and under audio options I replaced the original with LM, and 2nd stream had the mix

- I saved the dvd and created it

- Then I used GSPOT to see the audio settings on my dvd and this is the result with GSPOT:

Codec: AC3
Info: 0xbd[0x80]:48000Hz 224 kb/s total (2 chnls)

edit: now i know why its AC3, cause of audacity... anyways i fixed this by using goldwave and stripwave and gspot now shows it as LCPM (edit i used a truel loseless source this time too)

[Churchchair]

Even I don't know anything about synchronizing videos, I really like it.
Nice job.

One remark: Metallica 1992/07/03 Athens Sample ???

[metalfex]

oh my bad lol, i didnt get enough sleep. edited the title now

[nuno_m]

Sounds good.
nice job

[Painmaker]

as far as for me it's sounds pretty good

[sorrowman]

Looks good to me dude

The one thing I never understood tho is why one would want a mix which includes both the original audio and the LM.com audio.

one track containing the original audio and one track containing the LM.com audio (perhaps with bits and pieces from the original audio to fill up bits and pieces that aren't included in the LM.com audio would be enough for me

[Elmoz]

well you can get more audience feeling when you mix both sources.

then you get great SBD audio on the songs and the crowd noise mixed together, because some times the LM recordings doesnt have that much crowd "noise"

[sorrowman]

right......to create a good 'concert vibe' some audience noise is preferable, but I've seen more projects who did it like that and the audio track containing a mix of two audiosources 'on top' of eachother sounds funny a lot of the times. I dunno, maybe Middletown '94 is a good example of what I'm trying to say. Middletown '94 also has a soundboard source and a VERY good audience source on it. One track with just the audience audio, one containing a clean SBD recording and a third track has the two put together....and it sounds odd for some reason.

With all due respect to your hard work FeX, but IMHO the audiotrack containing the audience audio and LM.com sounds somewhat scratchy compared to the track containing just the LM.com audio (the synching itself is excellent tho ). I've done a synching project or two myself as well using multiple audio sources and all, and the question I always ask myself is how will a particular action affect the overall quality of a product.

In this instance you seemingly have a somewhat scratchy audience recording and a top-notch LM.com soundboard recording. Putting the two together will enhance the 'concert vibe' without a doubt because more audience noise is hearable, on the other hand...the overall soundquality of the music is degraded quite a bit because the audience recording isn't particularly good IMHO....so I would ask myself is....is a hearable audience to be preferred over a considerably worse overall soundquality...from where I stand the answer would be no, but ofcourse....who am I

Maybe messing about with the volume of the audience audio might reduce the overall scratchy effect I'm hearing on the third track. Maybe you lower the volume of the audience audio during the songs, so you can hear more crisp SBD audio and turn the volume of the audience audio a bit up in spots where you want to hear the audience, which I assume is in between the songs and perhaps the 'die' part of 'creep' and maybe the when the audience does their parts on 'seek'....that's what I usually end up doing whem I'm putting together two or more audio sources.

[jarrur]

Correct sorrowman. On the 3rd mix, more SBD and the audience track to only support the vibe.

[metalfex]

thanks for the advice, i will keep that in mind for sure. Ever since I created this thread ive already authored about 3/4 shows with dual audio and it went great. I only have problems with shows after 2004 with livemet but ill leave that to the pros