Re: How to synch new audio to existing music video?

Date: Thu, 17 Jul 2003 07:49:14 -0400
Newsgroups: rec.video.desktop
Size: 2,870 bytes

On Thu, 17 Jul 2003 08:42:10 GMT, Max Volume <email-address-deleted>
wrote:
>In article <email-address-deleted>, funsoul
><email-address-deleted> wrote:
>
>> Does anyone know the best way to add and synch a new audio track to an
>> existing video? If I have a vid where the audio is horrid but have a
>> pristine copy of the audio on cd somewhere....what's the easiest and
>> best quality way to get them properly synched?
>
>If you're talking about using a track off a music CD under the music
>video for the same song, it may be very difficult. The most common
>problem would be that the "album version" may be quite different than
>the "video edit", and therefore would refuse to sync up due to
>differences in length or in the music itself (i.e. the lack of a bridge
>in the video is gonna cause a problem if there's an extended bridge on
>the album). Another problem would be if there's dialogue or sound
>effects in the video, but not on the CD. Even if the tracks are
>identical, it's quite possible that you'll need to speed up the track
>off the CD slightly to sync it up with the video track, which may seem
>to play a little faster. Even then, the clip may go out of sync even
>if it starts out okay. Finally, even if you get everything to sync up
>perfectly, you're still gonna notice a discrepancy between the grainy
>video (off a VHS tape, I'm assuming) and the "pristine" audio from the
>CD. Audio for video is typically "sweetened", so there's going to be
>some differences between the overall sound of the CD audio and what the
>audio track for the video sounded like originally. Especially if
>you've listened to the CD often, your brain probably won't connect the
>video and the audio very well -- it'll be like watching TV with the
>sound off while listening to the CD.
>
>Hope this helps.
Hi Max
Thanks for responding.
Well...the video is of an old concert, the cd is of the same exact
concert so many of the issues you raise are inapplicable in this case.
My current thought is to capture the vid as normal and extract the
.wav files from the cd. Load the video (with it's captured audio
track) into an editor's (like premiere) timeline. Add the cd wav audio
to the audio2 section of the timeline. Expand the 2 audio tracks so I
can see the outputs. Then, going along the timeline, visually compare
the tracks. If/when/as they start to go out of synch, add/remove
sufficient video frames to keep the audio tracks synched. Seems a bit
tedious as the concert's about 3 hours (that's a helluvalot of frames
to go through) so was hoping to find an easier way to go about it.
In any case....your comments are appreciated.
-funsouil
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