[PD] pix_video problem

Pierre Desprats pierre.desprats2 at gmail.com
Mon Oct 14 17:11:57 CEST 2013


sorry, I'm answering really slowly but I couldn't have a SDI camera 
since I posted my question.

Today I made some new tests, and guess what; it's working.

The only thing I changed is that I have 2 new devices : usb camera and 
an Osprey card for SD camera.

The blackmagic driver works only if the usb camera is connected. When I 
disconnect, I loose the signal and PD crash.

When the usb camera is plugged, everything is stable and works fine.

Thanks for your help, I'm sure thoses informations will be usefull 
really soon.

Le 27/09/13 23:54, Antoine Villeret a écrit :
> hello,
> to reduce CPU eating, did you try to put each [pix_video] in a 
> separate pd~ and then send the image to a main patch with [pix_share_*] ?
> this could help
> I never worked with blackmagic card but it could be possible to add a 
> new backend to [pix_video] to support those cards "natevely" in pd.
> +
> a
> --
> do it yourself
> http://antoine.villeret.free.fr
> 2013/9/27 Benjamin ~ 01xy <benjah at free.fr <mailto:benjah at free.fr>>
>     Hello,
>     We are using a blackmagick decklink quad on linux
>     to get the signal threw pix_video, we use the bmdcapture command
>     line tool combined with ffmpeg so as to write on a virtual video
>     device created by v4l2loopback (cf
>     http://wiki.labomedia.org/index.php/AstroFluxTechnique#bmdcapture_.7C_ffmpeg)
>     it works fine and it is stable even if we plug/unplug the video
>     sources, it allows us to capture 1080i video or PAL video
>     encapsulated in the SDI signal, but if we try to capture 4x1080i
>     signals, the framerate is less than 25fps as Pd is > 100% CPU
>     ++
>     Benjamin
>     Le 27/09/2013 09:21, Etienne Landon a écrit :
>>     Hello list, my first message ! youpi
>>     Regarding Blackmagic on linux you have to use gstreamer through
>>     pdgst.
>>     There are two plugins "decklinsrc" and "decklinksink", this is
>>     working great !
>>     I think they are in the "bad" plugin set
>>     If this works the same in windows, perhaps you have to fisrt set
>>     the mode of the blackmagic before turning gem on. By setting up I
>>     mean selecting the appropriate input and video resolution.
>>     And I confirm, never change settings while using it, unplugging
>>     the blackmagic input whit gem on freezes my computer
>>     Etienne
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