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Converting to AAC? Get comfortable.

For disk space considerations, and for the sheer tweak factor, I'm copying/converting 1400 of my 192k mp3s to 128k mp4s for use exclusively on my ipod. (I'm all for trading a little sound quality for a few more gigs of space.)

I did a little research before starting the project, but no where did I find anything mentioned about the amount of time involved in converting this many files.

I began the conversion (using dbpoweramp and its myriad of separate doohickeys to make the process work) and sat there for a while, watching the progress meter. It didn't move. I went to the bathroom and came back. Still 0%. I went to lunch and came back half an hour later. It was still 0%, but it said 10 or so files had been processed.

I stopped the program and went into the preferences, looking for a "ridiculously slow" checkbox or something. I couldn't find anything like that, so I assumed I'd set us up the program correctly.

Some time later, the progress bar finally reached 1% and displayed an estimated completion time of 48 hours. Yes, like the show. 2 days. The lifespan of a mayfly. I had no idea what I was getting into.

That was yesterday at noon. The program hung overnight for an undetemined amount of time, and again a couple of times today. It said it was unable to access memory for some reason. So I lost some time in there somewhere.

All I know is, I have 480 files left to convert, and the countdown says 15 hours. I think that's sometime in early September.

Meanwhile the computer is not happy. It's developed a slight cough and won't let me run much else. I tried to play Unreal Tournament, but it just laughed at me. When this is all over, I'm taking it out for ice cream.

In the end, I hope to gain at least 10 gigs out of the deal and another story to help solidify my friends' theories that I really need a girlfriend.

Oh, and why am I writing this? See above.

-Rob
[2048 byte] By [mcdj] at [2007-11-9 12:59:54]
# 1 Re: Converting to AAC? Get comfortable.
What is converting from the original CD like timewise?
xsfo at 2007-11-15 14:15:43 >
# 2 Re: Converting to AAC? Get comfortable.
thats the only reason why AAC wasn't more popular than mp3, the sheer amount of processing power it takes to convert to it
this thread should serve as a good warning to any other people thinking about trying the same thing :P
bad luck man
scarf at 2007-11-15 14:16:54 >
# 3 Re: Converting to AAC? Get comfortable.
It takes iTunes the same amount of time to rip a CD to AAC as it does to rip it to mp3. Rather than do it all at once, why not split it up into chunks and have the compuer run while you're sleeping or something?
eustacescrubb at 2007-11-15 14:17:50 >
# 4 Re: Converting to AAC? Get comfortable.
I found that MP4/AAC encoding was *faster* than MP3 encoding.

Takes just a couple of minutes to encode to AAC (from Wav) using Quicktime 6.3. LAME (APS) seems to take a little longer.

That's on my mahcine (laptop 1.13 Ghz, 512 MB of RAM), YMMV.
kristofer at 2007-11-15 14:18:56 >
# 5 Re: Converting to AAC? Get comfortable.
So why do all 1400 at once?

Break them up, do 100 a night for 14 nights...
slr001 at 2007-11-15 14:19:55 >
# 6 Re: Converting to AAC? Get comfortable.
Yeah thats what I did. I just did 3700 off cd. Id do about 25 or 30 cds a day then encode all night.
BigIzz at 2007-11-15 14:20:54 >
# 7 Re: Converting to AAC? Get comfortable.
Does converting an MP3 to an MP4 result in the same quality as if you had created the MP4 directly from the CD? Seems like there would be some loss there, no?
Jack at 2007-11-15 14:21:58 >
# 8 Re: Converting to AAC? Get comfortable.
I liked the writing style.
Mister E at 2007-11-15 14:22:50 >
# 9 Re: Converting to AAC? Get comfortable.
Originally posted by Jack
Does converting an MP3 to an MP4 result in the same quality as if you had created the MP4 directly from the CD? Seems like there would be some loss there, no?

you lose quality when you convert from one lossless format to another lossless format, which means ACCs converted from mp3s are going to sound worse than ACCs converted from wav. So Rob I'm not sure if you did a sound check to see if you like how the files sound, but just be warned you'll be losing extra sound quality. I've never tried it though, so I hope its not too much. Good luck.
nddl05 at 2007-11-15 14:23:59 >
# 10 Re: Converting to AAC? Get comfortable.
See, that's why I wrote a script (winxp) to have itunes do them all for me... I just ran it overnight and it worked without a hitch, I even had it copy over my playcounts and last time played, too, so I didn't lose the data with the new files.

If anyone is interested, email me at jasonlustig AT adelphia DOT net and i'll send it to you.

Jason
stagmeister at 2007-11-15 14:25:00 >
# 11 Re: Converting to AAC? Get comfortable.
Originally posted by nddl05
you lose quality when you convert from one lossless* format to another lossless* format, which means ACCs converted from mp3s are going to sound worse than ACCs converted from wav. So Rob I'm not sure if you did a sound check to see if you like how the files sound, but just be warned you'll be losing extra sound quality. I've never tried it though, so I hope its not too much. Good luck.
*its lossy, not lossless (this is for music that has no loss in quality and its uncompressed)
zerock at 2007-11-15 14:25:58 >
# 12 Re: Converting to AAC? Get comfortable.
*its lossy, not lossless (this is for music that has no loss in quality and its uncompressed)
FLAC is losless AND compressed ;)

Mister E:I liked the writing style.
It was very good :)
BarryB at 2007-11-15 14:27:00 >
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