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Topic: Converting MP3 to Smaller MP3 or AAC? (Read 3223 times) previous topic - next topic

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  • Chris-AFC
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Converting MP3 to Smaller MP3 or AAC?
Hi guys

Basically I have recently been converting all my FLAC files to 128kb AAC files to put on a cloud server so I can use on my phones and what-not when away from home.  The reason for the low bitrate is the limited cloud storage space.  I use the highest possible VBR MP3 files on my Cowon J3 so the cloud music is really only for backup and so I can put absolutely EVERYTHING on there.

Even though the vast majority of my collection is in FLAC, I do have some MP3 files too.  Most of them are 320 CBR and I will need to downsize them to get them all on the cloud.  What I'm wondering is, will I be better off converting them to something like 128 VBR MP3 or to 128kb AAC?  Normally I'd always choose AAC at that bitrate but I'm worried if converting to a different format from MP3 will result in worse quality than just converting to 128 VBR MP3.

Thanks in advanced for any help.

  • pdq
  • [*][*][*][*][*]
Converting MP3 to Smaller MP3 or AAC?
Reply #1
It has been reported that converting mp3 to mp3 gives worse results than mp3 to other lossy formats, but this is just anecdotal. You really should test for yourself.

  • Dynamic
  • [*][*][*][*][*]
Converting MP3 to Smaller MP3 or AAC?
Reply #2
Our very own Wiki / Knowledgebase includes an article with many links to past experiences, all with TOS#8 style evidence

http://wiki.hydrogenaudio.org/index.php?title=Transcoding
Dynamic – the artist formerly known as DickD

  • Chris-AFC
  • [*]
Converting MP3 to Smaller MP3 or AAC?
Reply #3
AAC it is then!

Cheers

Converting MP3 to Smaller MP3 or AAC?
Reply #4
Quote
It has been reported that converting mp3 to mp3 gives worse results than mp3 to other lossy formats


I thought the conversion process involved decoding the source file to an intermediate uncompressed format.

  • eahm
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Converting MP3 to Smaller MP3 or AAC?
Reply #5
This guy did few test with lossy codecs re-compressing up to 100 times. I think once for personal purposes is fine.

http://www.hydrogenaudio.org/forums/index....st&p=828298
  • Last Edit: 03 July, 2013, 04:15:21 PM by eahm

  • greynol
  • [*][*][*][*][*]
  • Global Moderator
Converting MP3 to Smaller MP3 or AAC?
Reply #6
Quote
It has been reported that converting mp3 to mp3 gives worse results than mp3 to other lossy formats

I thought the conversion process involved decoding the source file to an intermediate uncompressed format.

That's correct, though it doesn't change the possibility that transcoding mp3 to a different lossy format will give better results, especially with smearing.
13 February 2016: The world was blessed with the passing of a truly vile and wretched person.

Your eyes cannot hear.