[pjsip] is it possible to send raw data over pjsip via passthrough codec?

Brandon Wong brandon at abstractpixel.com
Mon May 19 11:49:27 EDT 2014


Thanks so much Bill! The data coming across is what I was expecting!

There's still a lot more to figure out... but thanks for the quick response
and help in the right direction.


On Mon, May 19, 2014 at 8:32 AM, Bill Gardner <billg at wavearts.com> wrote:

>  PCMU is not lossless, because it is converting 16-bit to 8-bit and back
> to 16-bit. Try the L16 codec instead. - Bill
>
>
> On 5/19/2014 11:20 AM, Brandon Wong wrote:
>
>  Hi everyone, I need some help.
>
>  I want to encode my own data not within pjsip then send it over to
> another client
> and decode it not within pjsip.
>
>  For an attempt to do this:
>
>  1) i filled up a "mem player" buffer with static data (eg. filled with
> the char 'A')
>
>  2) i set the codec to PCMU/8000/1 (which should be a lossless
> passthrough)
> and also tried this with a custom codec that just copies the input to the
> output for an effective passthrough...
>
>  3) i make a call
> connect the mem player to that call
>
>  4) on the other end
> i connect the call to a file writer
>
>  the data that gets written is not the same as the buffer that i created.
>
>  when i connect the "mem player" directly to the "file writer" within the
> same app, i do get the results i am looking for.
>
>
>  If anyone can offer some insights on why this is not working properly,
> or an alternate route i should take... I would be very grateful!
>
>  Thanks,
> Brandon
>
>
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