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Old 06-19-2008, 07:28 AM   #1
Nerfboy
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Default MP3 sounds distortion

I just started editing in Edius 4.6 (HDV project).

I have added a song in mp3 format that sounds fine from it's source file, but when I add it to the timeline the beginning is a bit distorted, but then clears up.

Anyone have an idea about this one?
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Old 06-19-2008, 08:17 AM   #2
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Hmm, converted to Wav and sounds fine, just don't know why that would happen.
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Old 06-19-2008, 08:49 AM   #3
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most mp3 files especially variable bitrate ones I tried are bad quality and cause artefacts in a 48k project

so I convert the 44.1k mp3's to wav 48k using the Easy CD Extractor File cnverter from poikosoft.com

it allows you to copy an entire music CD to hard disk and 48k wav in 5 minutes

remember, video is 48k, CD audio is 44.1 and most mp3 are 44.1 or less
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Old 06-19-2008, 10:00 AM   #4
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MP3 is a video file, but with the video removed, so you end up with an audio file which often has corrupted headers and leads to editing problems.
Stick to using wav and you'll be fine.
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Old 06-19-2008, 11:17 PM   #5
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Always stick to 48K or you may get drift over the timeline!
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Old 06-19-2008, 11:21 PM   #6
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Quote:
Originally Posted by skier-hughes View Post
MP3 is a video file, but with the video removed, so you end up with an audio file which often has corrupted headers and leads to editing problems.
Stick to using wav and you'll be fine.
MP3 is a lossy audio format, not a video format
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Old 06-19-2008, 11:38 PM   #7
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Correct.

We're (Thomson) part of the original engineering of MPEG-1 Audio Layer 3 and practically own the license for it. :)
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Old 06-20-2008, 11:52 AM   #8
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My bad understanding of previously read material.

Though reading through links from Stormdaves link I came across this little snippet....

Sisvel S.p.A. and its U.S. subsidiary Audio MPEG, Inc. previously sued Thomson for patent infringement on MP3 technology

Ooops.

Why is MP3 such a blighter to edit then? Is it jsut the vast array of encoders and not suitable decoders at the other end?
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Old 06-20-2008, 03:05 PM   #9
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MP3 is compressed audio, like MPEG-2 is compressed video..

While to a user, the decoding might seem trivial on a computation level, the work still has to be done. At the same time as decoding video and then hoping it all goes out in sync.
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Old 06-22-2008, 03:22 PM   #10
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I always convert to wav, and with todays fast internet / ftp's etc. it's easier to move moderate wav files arround.

/Ulf
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