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Audio settings
I have these .wmv movies that I’m editing in FCP by first converting them to .mov files using 8bit uncompressed codec in QT Pro. The ultimate output will be Flash (.flv) movies delivered on a thumb drive. I have taken these .mov files into FCP to run a test output to Flash (Compressor with the Flix Exporter plug-in). The Flash movies look good enough, but the audio has picked up considerable sibilance in this process.
The original .wmv files have the audio compressed at 44.1kb at 16bit. The audio in these original files sound quite good and clearn. Would I minimize the sibilance by changing the audio, when I convert the .wmv to .mov in QT Pro, to 48kb and raising the bit depth to 24 bit? Or, is it better to just adjust the audio quality in FCP with filters like the deessing filter?
Thanks,
David -
5 Replies
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[David Donnenfield] “The Flash movies look good enough, but the audio has picked up considerable sibilance in this process.”
David,
I know exactly what you’re talking about. There’s a metallic ringing or flanging, similar to sibilance, that I get with Flix Pro when encoding to Flash at times. I wrote to the ON2 folks about it and never received a response.
After much tinkering, I found that encoding from any previously compressed source adds substancailly to the problem. In fact, it’s just about impossible to encode anything useable from a previously compressed source. You may find there’s nothing you can do with a WMV source, but try increasing to 48khz at 24bit, and see if it helps.
Keep me posted…
David
David Roth Weiss
Director/Editor
David Weiss Productions, Inc.
Los AngelesPOST-PRODUCTION WITHOUT THE USUAL INSANITY ™
A forum host of Creative COW’s Apple Final Cut Pro, Business & Marketing, and Indie Film & Documentary forums.
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Actually, I have another idea I’m going to pursue first, which is to go with “uncompressed” audio in the Flash file compression. I’m not really limited in my playback data rate, so maybe indulging in this luxury with the audio will minimize the problem. I’ll let you know.
David -
Well, encoding the Flash file using “uncompressed” reduced the level of flanging-sibilance, but did not eliminate it. One last test then to see if 48KB at 24 bit helps. If not, then I have to speak with the client about this job.
David -
David,
BTW, if it helps, the added “feature set” that you and I can hear through our productions speakers, is not typically heard through most computer speakers. Its is evidently at a frequency beyond the dynamic range of most shitty speakers.
David
David Roth Weiss
Director/Editor
David Weiss Productions, Inc.
Los AngelesPOST-PRODUCTION WITHOUT THE USUAL INSANITY ™
A forum host of Creative COW’s Apple Final Cut Pro, Business & Marketing, and Indie Film & Documentary forums.
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That’s exactly what I just discovered when I played the test file back on my laptap. Therefore, the project moves forward. Thanks for all of your information, it completely confirms my experience.
David
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