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compressor X question
Not sure if this is the best place to post this… but I don’t see a Compressor forum.
I have files that are DVCPro HD with 4 channel 16 bit audio . (mix ch 1-2, M&E 3 – 4)
I want to convert these to Prores.. (not the problem) and convert the audio to 24bit audio (please don’t ask why) without changing the content of each track.
I can’t seem to figure out how to do this. It seems to want to convert my file to a stereo file. If I ask for a 4 -channel output it blends the 4 tracks into one mono track plus 3 empty tracks. If I did not need to convert the audio I’d just do an audio pass-though. But alas…
Could anyone enlighten me on the proper technique..
thanks
Jason
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4 Replies
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My mistake… it creates one stereo channel and two blank channels..
j.
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If you check Compressor’s audio inspector for the file, you’ll notice it sees the 4 channels all assigned to Center… I did a quick test modifying those settings, changing each to a discrete track:
…and then selected 4.0 24bit on the output. This appears to do the right thing, but the metadata in the output file may cause other issues.
Alternatively, with QT Pro 7 direct export you can specify 4 discreet channels for output:
Neither of these options are ‘batch’ options, though you could use a folder action or AppleScript for the QT7 method. In Compressor, you have to modify each file individually so large batches would get tedious in a hurry.
Doug Metz
Anode
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Thanks Doug.
The compressor settings got me closer… I did what you suggest and assigned the channels of the source file. When I create a setting for my encode the only choice one gets for an output format that has four channels is “4.0 (L R C CS)” and when I use that channels one and two are correct ( full mix 1 and 2 ) channel 3 is blank and channel 4 has the correct M&E (at least i think it is correct but I suppose it might be ch 3 and 4 mixed??).. funny that they don’t allow you more control over the output format for audio.
I don’t have quicktime 7 pro.. will try to dig up a copy of that somewhere…
thanks for your help it’s appreciated.
jason
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I think I found the cheat.. I assign the 4 input tracks as left, right, centre and centre surround, then select 4.0 as the output…
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