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mp3 music file too slow (and the output file too big) after conversion from aac

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petru.m...@gmail.com

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Jul 25, 2006, 9:38:32 AM7/25/06
to
Hi,

After conversion (using ffmpeg, see below) from aac to mp3, the output
file is too big, and, when listening to it, the music is way too
slow.

How can I fix this?

Thanks,
Petru

$> ffmpeg -i /tmp/radio/input-from-radio.aac -acodec mp3
/tmp/radio/output.mp3
FFmpeg version SVN-r5804, Copyright (c) 2000-2004 Fabrice Bellard
configuration: --enable-mp3lame --enable-faac --enable-faad
--enable-gpl
libavutil version: 49.0.0
libavcodec version: 51.10.0
libavformat version: 50.5.0
built on Jul 25 2006 07:42:27, gcc: 3.4.4 (cygming special) (gdc
0.12, using dmd 0.125)
Input #0, aac, from '/tmp/radio/input-from-radio.aac':
Duration: 00:20:33.4, start: 0.000000, bitrate: 35 kb/s
Stream #0.0: Audio: aac, 22050 Hz, stereo, 35 kb/s
File '/tmp/radio/output.mp3' already exists. Overwrite ? [y/N] y
Output #0, mp3, to '/tmp/radio/output.mp3':
Stream #0.0: Audio: mp3, 22050 Hz, stereo, 64 kb/s
Stream mapping:
Stream #0.0 -> #0.0
Press [q] to stop encoding
size= 21371kB time=2735.5 bitrate= 64.0kbits/s
video:0kB audio:21371kB global headers:0kB muxing overhead 0.000000%

$> ls -l /tmp/radio/input-from-radio.aac /tmp/radio/output.mp3
-rwxrwxrwx 1 HP_Administrator None 5471126 Jul 20 07:09
/tmp/radio/input-from-radio.aac
-rw-rw-rw- 1 HP_Administrator None 21883715 Jul 25 08:01
/tmp/radio/output.mp3

Don M.

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Jul 25, 2006, 11:15:28 AM7/25/06
to

<petru.m...@gmail.com> wrote in message
news:1153834711....@m73g2000cwd.googlegroups.com...

> Hi,
>
> After conversion (using ffmpeg, see below) from aac to mp3, the output
> file is too big, and, when listening to it, the music is way too
> slow.
>
> How can I fix this?
>
> Thanks,
> Petru
>
=========

Set your output to 44100 Hz.


Don


petru.m...@gmail.com

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Jul 26, 2006, 12:23:51 AM7/26/06
to
Don M. wrote:
>
> Set your output to 44100 Hz.
>
>
> Don

I've tried this, but with no success. The result is SLOW, no matter
what I do to the rates etc. :-(

$> ffmpeg -i /tmp/radio/input-from-radio.aac -acodec mp3 -ar 44100
/tmp/radio/output/output.mp3


FFmpeg version SVN-r5804, Copyright (c) 2000-2004 Fabrice Bellard
configuration: --enable-mp3lame --enable-faac --enable-faad
--enable-gpl
libavutil version: 49.0.0
libavcodec version: 51.10.0
libavformat version: 50.5.0
built on Jul 25 2006 07:42:27, gcc: 3.4.4 (cygming special) (gdc
0.12, using dmd 0.125)
Input #0, aac, from '/tmp/radio/input-from-radio.aac':
Duration: 00:20:33.4, start: 0.000000, bitrate: 35 kb/s
Stream #0.0: Audio: aac, 22050 Hz, stereo, 35 kb/s

File '/tmp/radio/output/output.mp3' already exists. Overwrite ? [y/N] y
Output #0, mp3, to '/tmp/radio/output/output.mp3':
Stream #0.0: Audio: mp3, 44100 Hz, stereo, 64 kb/s


Stream mapping:
Stream #0.0 -> #0.0
Press [q] to stop encoding

size= 435kB time=55.7 bitrate= 64.0kbits/s

I also found somebody with a similar problem:
http://groups.google.com/group/comp.os.linux.misc/browse_frm/thread/d29208f67ab8a409/a3878e2dd28b1454?lnk=st&q=&rnum=2&hl=en&utoken=Zh4t-TUAAAARsaj8gXb6nQ09pETiGKzRrh-bMYjiGHeUZGUUSiYgt-iloR0iOR2u40KjoJmZLdVqNNwQSo-7ZYG0p06t53wP
I've tried to convert to a wav file (what does raw format mean?!) and
then to mp3 but still it is invariable slooooow.

Regards,
Petru

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