Replacing audio in a QT movie – can it be done without degrading the video?

[Barend Onneweer]

I’ve done it in Audition, but that’s not your question.
It can’t be done in AE, and I’m not 100% sure about Premiere. Importing DV into a DV timeline and rendering to DV doesn’t cause recompression (unless effects or processing are added). But in your case I think you’ll see recompression.

Bar3nd

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[Joakim Dalfors]

Hello Barend and thanks for quick response.
As you say, using the DV format will not give rise to recompression but I am convinced that photoJPG will.
But you mentioned audition. I do have acess to that program and if I understand you correct, it is possible in Audition without rerendering of the video?

best regards
Joakim

[Joakim Dalfors]

Hello Dave!
And thanks to you to for quick response.
I do have QT pro but I have almost now experience in using it except as a player. And yes the only thing I want do do is replace the audio with a clip of the same duration.
I

[Joakim Dalfors]

Hello again.
I tried Audition and it worked exactly as I wanted.

Many thanks for the good advise!
Joakim

[Stefan Tapper]

Hi jodal,

you can do it in audition, but with no appropiate compression(i think) only uncompressed.

If you have your audo exported, open it with quick choose>export>qt movie>unchek video>check audio and export it to AAC for example. AAC gives good quality at low bitrates, For web-audience I would choose ~160kbit/s for purposes 320.

When the movie is exported open it with qt choose edit>mark all>copy- Open your rendered movie choose>edit>add to movie. If your movie contains already audio, choose window>movie proberties and uncheck or delete the old audio track.

When you just save your movie now, qt will link the audio to the original audio file/movie. If you want to save the audiostream within your original movie choose>file>save as standalone movie…

PS: I use a german qt version and translated all the dialogs badly. I’m sure they are named different in your version. But you should find your way easily.

Stefan