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> All Audio Codecs That Play On Zaurus?, Let's compile a list:MP3,OGG,WAV,etc...
TonyOlsen
post Dec 15 2004, 07:39 AM
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What are all of the audio codecs that are supported under Zaurus?

So far I know of:
  • MP3 (MPEG-Layer 3) - plays on default audio player and most (all?) audio players
  • WAV (Uncompressed) - *gag*
  • OGG (Ogg Vorbis) - plays on "MediaPlayer" after installing special plugin
OGG is roughly twice as good as MP3, but neither of them are very good at doing what I need. I have many audio books I want to listen to on my Zaurus. Previous to my Zaurus I used 5 kbps RealAudio and/or 5 kbps Windows Audio. MP3s can only go down to 16 kbps (and most encoders can only go down to 32 kbps). Ogg Vorbis can only go down to 9 kbps (and forces the file to remain stereo), and even this is only possible if I encode the audio file to an 8 KHz uncompressed WAV file and then encode OGG using the lowest audio quality (this is the solution I'm currently using and the quality is fine for audio books... but it is a waste since it requires stereo even though the source is in mono).

Are there other audio codecs that are supported under the Zaurus through any means, hacks, installations, etc?

OR...

Is there a way to encode MONO OGG files (so I can get down to 4-5 kbps?)
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chrget
post Dec 15 2004, 08:47 AM
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QUOTE(TonyOlsen @ Dec 15 2004, 03:39 PM)
What are all of the audio codecs that are supported under Zaurus?

[...]

Are there other audio codecs that are supported under the Zaurus through any means, hacks, installations, etc?

OR...

Is there a way to encode MONO OGG files (so I can get down to 4-5 kbps?)

There are other codecs that can be built for playback on the Zaurus -- as for how/where to incorporate them into existing player programs, I certainly won't touch that wink.gif

For one, there is FAAD2, which builds just fine on the Z and provides it with AAC decoding abilities. But even AAC doesn't perform all that well when it comes to the bitrates you are shooting for.

As you have noticed, Vorbis is not designed for that kind of operation either. For this, the Xiph.Org people offer Speex (look here for details), which is designed as a low bitrate speech codec which easily goes down to the bitrates you are targeting.

The only other codec that comes to mind with that kind of performance would be AMR -- but not only are there patent issues involved, but the status of the available source code (i.e. the reference implementation) is unclear with regard to licensing. It can be built on the Z though and does work well enough in the appropriate context.

So my recommendation would be to use Speex. The minimum playback application is provided with the source code, and it should quite easily integrate into VLC, MPlayer and who knows which other players that can be built for the Zaurus.

Hope this helps.

Best regards,
Chris.
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