[Live-devel] Audio Formats Supoort

[Subbu]

Hello Ross,

Thank you for your kind reply. I am very happy to see your prompt
clarifications.

As my build is failing to receive audio, where do you want me to cross check
this? please give me a hint for good start for fast results.

I once again thank you for all your patience and efforts and time towards
developers.
I look forward to your reply.


Regards,
Subbu


----- Original Message -----
From: "Ross Finlayson" <finlayson at live555.com>
To: "LIVE555 Streaming Media - development & use"
<live-devel at ns.live555.com>
Sent: Tuesday, April 11, 2006 7:33 PM
Subject: Re: [Live-devel] Audio Formats Supoort


>
> >But I am able read video alone but not audio from RTSP stream for the
> >following audio format combinations using "live.2006.03.17.tar" source
> >build.
> >1. Linear PCM (16-bit integer [Little Endian] Mono 44.100 kHz)
>
> You could read this using "SimpleRTPSource" (plus, a "EndianSwap"
> filter, if you're on a big-endian machine, which most people these
> days are not).
>
> >2. A-Law 2:1 (A-Law 2:1 Mono 44.100 kHz)
>
> Not currently supported, but it would be quite easy to add.  (Look at
> how we do u-law audio - note how we implement "PCMFromuLawAudioSource".)
>
> >3. AMR Narrowband (AMR Narrowband Mono 8.000 kHz)
>
> This is just "audio/AMR", which is implemented by "AMRAudioRTPSource".
>
> >4. Apple Lossless (QTSS not serving audio)
> >5. IMA 4:1 (IMA 4:1 Mono 8.000 kHz)
> >6. MACE 3:1 (MACE 3:1 Mono 8.000 kHz)
> >7. MACE 6:1 (MACE 6:1 Mono 8.000 kHz)
> >8. Qdesign Music 2 (QDesign Music 2 Mono 8.000 kHz)
>
> None of these are supported, because I don't know the payload format
> for them.  As far as I know, these are proprietary and unpublished.
>
> >9. Qualcomm PureVoice (Qualcomm PureVoice Mono 8.000 kHz)
>
> This is (I believe) another name for "QCELP", which is implemented by
> "QCELPAudioRTPSource".
>
>
> Ross Finlayson
> Live Networks, Inc. (LIVE555.COM)
> <http://www.live555.com/>
>
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