[nzlug] m4a to mp3

[Vik Olliver]

Perhaps I should be a little more specific. This is what happens when I
try the standard mplayer convert:

vik at vik:~/tmp$ mplayer -ao pcm GearLivePodcast.019.m4a -ao pcm:file="GearLivePodcast.019.wav"
MPlayer 2:0.99+1.0pre7try2+cvs20060117-0ubuntu8 (C) 2000-2006 MPlayer Team
CPU: Intel Pentium 4/Celeron 4 Northwood; Pentium 4 EE/Xeon Prestonia,Gallatin (Family: 15, Stepping: 7)
CPUflags:  MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.


91 audio & 204 video codecs
Linux RTC init error in ioctl (rtc_irqp_set 1024): Permission denied
Try adding "echo 1024 > /proc/sys/dev/rtc/max-user-freq" to your system startup scripts.
Opening joystick device /dev/input/js0
Can't open joystick device /dev/input/js0: No such file or directory
Can't init input joystick
Setting up LIRC support...
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support.
You will not be able to use your remote control.
Playing GearLivePodcast.019.m4a.
ISO: File Type Major Brand: Apple iTunes AAC-LC Audio
Quicktime/MOV file format detected.
--------------
MOV track #0: 1 chunks, 0 samples
Generic track - not completely understood! (id: 0)
--------------
MOV track #1: 2 chunks, 0 samples
Generic track - not completely understood! (id: 1)
--------------
MOV track #2: 1624 chunks, 15420 samples
Audio bits: 16  chans: 2  rate: 44100
MOV: Found MPEG4 audio Elementary Stream Descriptor atom (51)!
Fourcc: mp4a
--------------
MOV track #3: 1 chunks, 0 samples
Image size: 300 x 300 (24 bpp)
Display size: 160 x 160
Fourcc: jpeg  Codec: ''
--------------
MOV: longest streams: A: #2 (15420 samples)  V: #3 (1 samples)
VIDEO:  [jpeg]  300x300  24bpp  0.003 fps    0.0 kbps ( 0.0 kbyte/s)
==========================================================================
Opening audio decoder: [faad] AAC (MPEG2/4 Advanced Audio Coding)
AUDIO: 44100 Hz, 2 ch, s16le, 64.0 kbit/4.54% (ratio: 8000->176400)
Selected audio codec: [faad] afm: faad (FAAD AAC (MPEG-2/MPEG-4 Audio) decoder)
==========================================================================
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffmjpeg] vfm: ffmpeg (FFmpeg MJPEG decoder)
==========================================================================
Building audio filter chain for 44100Hz/2ch/s16le -> 0Hz/0ch/??...
[AO PCM] File: GearLivePodcast.019.wav (WAVE)
PCM: Samplerate: 44100Hz Channels: Stereo Format s16le
[AO PCM] Info: Faster dumping is achieved with -vc null -vo null
[AO PCM] Info: To write WAVE files use -ao pcm:waveheader (default).
AO: [pcm] 44100Hz 2ch s16le (2 bytes per sample)
Building audio filter chain for 44100Hz/2ch/s16le -> 44100Hz/2ch/s16le...
Starting playback...
VDec: vo config request - 300 x 300 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 3)
Movie-Aspect is 1.00:1 - prescaling to correct movie aspect.
VO: [xv] 300x300 => 300x300 Planar YV12
A:   0.8 V:   0.0 A-V:  0.772 ct:  0.077   1/  1 ??% ??% ??,?% 1 0

Exiting... (End of file)

The result - brief burst of white noise. Source URL:

http://media.libsyn.com/media/gearlive/GearLivePodcast.019.m4a

Vik :v)
-------8<---------8<---------8<---------8<---------8<---------8<-----
"Every gun that is made, every warship launched, every rocket fired,
signifies in the final sense a theft from those who hunger and are not
fed, those who are cold and are not clothed."

- President Dwight D. Eisenhower