[Live-devel] H264 + ulaw streaming with audio vibration

[Eric_Hsieh at alphanetworks.com]

Hi Ross,

Thanks for your quickly reply.

Each time, we will put 1024 bytes to ulaw encode and it produce 512 bytes ulaw data out.
Then we copy 512 bytes to fTo and put 512 to fFrameSize.
For fDurationInMicroseconds, we set 16000.
I think it should be right. But I don’t know why 16K, stereo audio is not working.
Thanks a lot.

regards, eric, 12/17

> On Dec 17, 2015, at 15:29, Ross Finlayson <finlayson at live555.com> wrote:
>
>> We have a rtsp server on embedded system, rtsp server will stream out H264+ulaw streaming.
>> Now, we face a problem. There is a vlc client to connect our rtsp server.
>> If the audio is
>> A. under 8K, 16bit, mono ulaw(encode from PCM), we set fDurationInMicroseconds to be 64000. Audio is good.
>> B. under 16K, 16bit, stereo ulaw(encode from PCM), we set fDurationInMicroseconds to be 16000. Audio is vibration.
>
> Remember that - for stereo - each PCM sample will be twice as large as it was for mono.  I suspect that your problem has something to do with this.
>
>
> Ross Finlayson
> Live Networks, Inc.
> http://www.live555.com/
>
>
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