Encoding from WAV to M4A cuts off ending?

Question

Encoding from WAV to M4A cuts off ending?

I batch encoded four audio-books for a client, editing in STP, outputting as WAVs, then using Compressor 3.5.3 to create the final deliverable AACs, with file-extension M4A. The client's QC folks got back to me saying the ends of several files had the last word cut off. I checked the WAVs, which were fine, but sure enough—the M4A files were between a half and three-quarters of a second shorter! Anybody else observe this behavior? Any fixes, besides pasting in a coupla seconds of Room Tone at the end?

Posted on Apr 3, 2013 1:24 PM

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Answer 1

JSFapple

Level 1

8 points

Apr 21, 2013 5:40 PM in response to Wayne Zeitner

I have this problem as well. I haven't done anything (on purpose anyway) to change the format of my WAV audio files, but when I play them now in iTunes 11 the last 1-2 seconds is missing on all of my WAV files.

It would seem that it has more to do with changes in iTunes than with the files themselves, which I haven't altered as far as I know.

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Answer 2

Russ H

Level 7

22,432 points

Apr 22, 2013 4:08 AM in response to JSFapple

I have done a few tests and with Compressor 4 and the format conversion didn't affect the length. On my case pulling the output files into iTunes did alter them, but actually made them a fraction of a second longer. Later today I'll use C 3.5 for some more tests. We'll see.

Russ

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