20 Jan
2015
20 Jan
'15
10:12 a.m.
Hm, I found a quick way to do it. Always brings me back to the underestimated QuicktimePro
Player (7):
Say you want to convert a trailer to DCP. The trailer ends with a 'In Miracle 3D'
slide, and an audio WOOSH. You trim off the 3D slide because you will play in 2D. But the
out point of the trim cuts of the audio WOOSH ungracefully. You would need to add some
black after the trim out point to give the WOOSH time to end. Or make the trim point
earlier for audio so that the WOOSH is eliminated completely. But that would also cut of
important imagery. Basically, what you need is a 'split edit', cutting audio and
video at different points.
First of all, the good thing is, you can create compositions of audio and video with
different lenghts, and DCP-o-matic can fill holes with either black or silence
automatically.
Now, currently the only way to do this is to import video and audio separately. When you
do this, you can set individual trim points for both. If you limit your choices to the
trailing end of the footage, it will stay in sync.
QuicktimePro Player has easy options to extract audio and video from an interleaved
video/audio file, without the need for any recompression. Just load your clip in QT
Player7 Pro, hit CMD+J (open Movie properties), select the individual tracks, choose
'extract' and select destination folder.
Usually it is sufficient to extract only the audio and keep the original file as is - you
can actually import the combined video+audio PLUS the separate audio track, then mute the
original interleaved audio in the channel matrix of DCP-o-matic. I case you f#up your
trimming or get lost, it might be useful to have the original synced audio still available
in DCP-o-matic.
Since you can't listen to the audio in DCP-o-matic currently, you may need to find the
audio outpoint in QT Player, or do the audio part of the trimming there (Yes, you can do
CTRL+X in QT Pro Player to do hard cuts). Or you open up the extracted audio file in
Audacity and cut it there before importing into DCP-o-matic. Just limit yourself to the
end of the clip, otherwise you end up with non-synced audio.
Then import both the original/video file, plus the extracted audio file. Deselect original
(interleaved) audio tracks in the audio matrix for the video file if necessary.
Select each one content and choose individual trim outpoint times.
This is how it looks in timeline view, tested it with Big Buck Bunny - I trimmed off the
last 5s of the video, and left the audio running through to the end. DCP-o-matic will fill
the video gap at the end with black. The original audio in the QT file is still there, but
muted using the audio matrix.
The turnaround using QT Pro Player is a lot faster than using a video editor, and it
involves no recompression of the footage.
- Carsten
