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32 bit floating audio in FCP 5
Hello,
I’m in the process of converting a lot of AVI footage from flip cameras for web content on a reality show. I’m using Isquint to convert the footage from AVI to MPEG4 but when I bring the footage into Final Cut 5.1.4, I’m having to render the audio. The clips are reading “32 bit floating integer” but the sequence presets only have 16 and 24 bit as options. I had read that FCP automatically defaults to 32 bit. Not sure i understand that as there are options in the presets. Anyway, anyone have any clue on a way that i don’t have to render my audio? The sample rates are definitely matching up. I actually exported some at 44 and some at 48 to see if that would make a difference. Isquint can’t change the depth and FCP doesn’t seem to like the 32 bit floating.
Thanks in advance,
Chrisreplied 17 years, 8 months ago 3 Members · 4 Replies
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4 Replies
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FCP accepts 16 bit or 24 bit 48khz files without render. If you give it 32 bit files they will have to be rendered. Internal audio processing happens in 32 bit so it is usual in an audio system that the file word length is smaller than the processing bit rate.
If your software can’t render the audio as 24 or 16 bit, then it will have to render.
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All I know for sure is if the audio isn’t 48kHz it will have to be rendered. I’m not sure about the 32-bit. FCP wants a 16 or 24-bit depth. See if your conversion program allows you to set bit depth to 16 or 24 and 48k and see what happens.
Also, I’m not sure FCP likes mpeg-4. I’d try converting to DV or DVCPro50 and see what happens.
John
MacPro 8-core 2.8GHz 8 GB RAM OS 10.5.5 QT7.5.5 Kona 3 Dual Cinema 23 ATI Radeon HD 3870
ATTO ExpressSAS R380 RAID Adapter, PDE Enclosure with 8-drive 6TB RAID 5
24″ TV-Logic Monitor
Final Cut Studio 2 (up to date)Pro Tools HD w SYNC IO, Yamaha DM1000, Millennia Media HV-3C, Neumann U87, Schoeps Mk41 mics, Genelec Monitors, PrimaLT ISDN
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Thanks. I was afraid of that.
I’m using I-squint which doesn’t have the bit option and I’m about halfway through. Someone else organized the footage which is in a hierarchy of folders with similar/identical names inside the folders ie VID000001, VID000002 etc.
Does anyone know of a program where i can batch convert, change the 32 bit to 24 or 16 and keep the hierarchy intact?
A tall order I know. i think I’m about to deal with weeks of annoying audio rendering.
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Compressor 2.3 can convert avi to whatever. It’s the last version I had with FCP 5.1.4. Also version 3.0.5 works, too. I didn’t have an avi with the audio characteristics you have, but compressor didn’t choke on the avi file I fed it. So try Compressor and see what happens. And you can run batches, too.
John
MacPro 8-core 2.8GHz 8 GB RAM OS 10.5.5 QT7.5.5 Kona 3 Dual Cinema 23 ATI Radeon HD 3870
ATTO ExpressSAS R380 RAID Adapter, PDE Enclosure with 8-drive 6TB RAID 5
24″ TV-Logic Monitor
Final Cut Studio 2 (up to date)Pro Tools HD w SYNC IO, Yamaha DM1000, Millennia Media HV-3C, Neumann U87, Schoeps Mk41 mics, Genelec Monitors, PrimaLT ISDN
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