Re: [h323plus] RES: h323plus working plugins

26 Jan 2010

      Hello,

I noticed that encoder_set_options of h263-ffmpeg plugin only works
while codec initialising. So if you are interested to change bandwidth
or quality setting during a videocall you must modify the plugin.

in encoder_set_options: add

  context->Lock();

  context->CloseCodec();

/* here options changing ... */

  context->OpenCodec();

  context->Unlock();

Then add two function Lock and UnLock to H263_Base_EncoderContext with
a mutex to ensure no encoding frames while openning or closing a codec!

    CriticalSection _mutex;

    void Lock() { _mutex.Wait(); }

    void Unlock() { _mutex.Signal(); }

Add a mutex signal to the beginning of 

H263EncoderContext::~H263EncoderContext()

{

  WaitAndSignal m(_mutex);

/* function code...*/

and

int H263EncoderContext::EncodeFrames(const BYTE * src, unsigned
& srcLen, BYTE * dst, unsigned & dstLen, unsigned int &
flags)

{

      WaitAndSignal m(_mutex);

/* function code...*/

So the parameters of ffmepg h263 become usable at least! 

Anyone tried with h263-1998 ? I'm still not able to make it working for
h323 for same reasons I mentioned in my first post. Could be
interesting to share some ideas!

Greetings,

Carlo

Subject: RES: [h323plus] h323plus working plugins
Date: Fri, 22 Jan 2010 14:48:41 -0200
From: leandro.alvares@caixa.gov.br
To: unazona@hotmail.com

Hi Carlos,

I got the same results as you....

I’m not happy with my vídeo quality (CIF)
and I need to activate the H.264 or H.263 4CIF, but I’m having a lot of dificults....

Regards,

Leandro
 Oliveira Alvares 

De:
h323plus-bounces@lists.packetizer.com
[mailto:h323plus-bounces@lists.packetizer.com] Em nome de Carlos Haj

Enviada em: sexta-feira, 22 de
janeiro de 2010 08:38

Para:
h323plus@lists.packetizer.com

Assunto: [h323plus] h323plus
working plugins

Hello Everyone,

I've been experimenting Opal plugins on h323plus stack. I would like to share
you my experience as it seems to me that most opal plugins doesn't work for
h323plus.

I compiled plugins along with correct ffmpeg and x264 revisions, on both
windows and linux platforms. Here is my test results:

H.261vic             
OK

H.263_ffmpeg      OK

H.263_1998         * Crashes before
packetising process, it works after I delay the packetiser function.

* Video pixels are melting strikes, even while disabling all h263 annexes.

MPEG4                * AVCodec crashes
on encoder function

H.264                 * It doesn't
compile at all after activating H323_H264_TEST

* Complains about some missing constants, which I added

* Compilation errors in structure definitions (h323 capabilities)

Theora              
Not tested

I'm unsure about the development priority and/or status of video plugins, as no
document states that. Anyone tried to experiment video codecs using h323plus?!
do you have same results as me?! 

Thanks, I appreciate.

Vous cherchez l'intégrale des clips de Michael Jackson ? Bing ! Trouvez !

Subject: RES: [h323plus] h323plus working plugins
Date: Fri, 22 Jan 2010 14:48:41 -0200
From: leandro.alvares@caixa.gov.br
To: unazona@hotmail.com