[Asterisk-video] if2 bit stuffing in app_h324m

Sergio Garcia Murillo sergio.garcia at fontventa.com
Thu Aug 2 13:47:29 CDT 2007


From: "Klaus Darilion" <klaus.mailinglists at pernau.at>
[...]
>> 1.- Play mp4 file to videophone
>> mp4 generated mpeg4ip and pcm2mp4 (h264-2000/pmcu)
>
> I have problems here. I have used an helix producer .3gp file and
> replaced the audio AMR trakc with ulaw using pcm2mp4. Streaming this
> file with DSS and viewing with VLc works fine.
>
> When playing back this file with mp4play and using eyebeam I have some
> problems which are probably caused by eyebeam. I have to:
> 1. open the video panel
> 2. call the mp4play extension
> 3. start video
> 4. close the video panel -> then the video panel will popup again and I
> have video :)

Isn't eyebean lovely??? :)
Please, if any of Couterpath read this, pleas FIX the CRAP video support
of eyebean. Stop using the still image capture api and move to directx!!
And please stop using 30% of my cpu just to show my local image.

> btw: does somebody know a better SIP video client for Windows? (Ekiga is
> PITA)

If you have Windows XP you could give linphone a try (I'm still with W2K so
can't test it)

>
>> 2.- Record mp4 from videophone
>> See if the recorded mp4 is visible in a video player (audio won't work).
>
> Record file.
> Playback in VLC - only video

Does it play at the correct framerate?

>> Put the mp4 into a streaming server and see if it's playable with a video
player.
> Playback in VLC via DSS: audio+video - but not synchronized :-(
>> Play the mp4 file to a videophone with mp4_play
> eyebeam: works (with same trick like above) - audio+video not synchronized
>> Play the mp4 file to a videophone with rtsp_play
>works too - still not synchronized

If you're using eyebean I think I know why. You have started the video call
and then
pressed the "start sending video" don't you? As I don't calculate the
initial delay of
the first frame of the media I save it as if all medias started at the same
time,
causing the lack of synchronization you see. [First issue for the todo
list].

Also another thing that is going to fail is saving CIF streams ( I think).

BR
Sergio





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