video-capture on Mac OSX

[Brian Quandt]

My experience on pre 1.0 is still images were the result of an
incompatibility in the audio frequency (ie my video device versus my audio
device).  For instance since video can have audio, but say I chose not to
use it but rather used another audio input, and the video's audio rate was
44khz, and my audio I was choosing externally was 48khz, voila everything
seemed to work fine, except I'd have a still image on video.   Not yet
tried 1.0.   Frankly, I was hoping a rework as I think qtkit is now
deprecated in 10.8?  Also, the qtkit plug-in seemed hardwired for 640x480
video (which kind of sucked for 720p new usb device, or even older fw
devices which supported 16x9 aspect.)

On Tue, Apr 16, 2013 at 2:10 PM, Jack Jansen <Jack.Jansen at cwi.nl> wrote:

> I have found that qtkitvideosrc is very finicky (and I assume that
> wrappercamerabinsrc is just a wrapper around it).
>
> With gstreamer 1.0 I have never managed to get a direct pipeline with both
> the video source and any displaying video sink to work. ximagesink always
> hangs on one frame, osxvideosink gives the spinning beach ball and doesn't
> show any frame.
>
> With gstreamer 0.10 it sometimes worked if you inserted an extra ! queue.
>
> What does work is to run two gstreamer processes: one to grab the camera,
> then transmit over a socket to a second process, then display there.
>
> And if you are using qtkitvideosrc programmatically you *must* run your
> gst/gobject main loop in the main thread.
>
> On  15-Apr-2013, at 04:55 , Haiming Wang wrote:
>
> Hi Dear Friends,
>
>     Can anyone give me some guide about my question?
> "
>
>
> *When I used below command line:*
> *
> *
> *  gst-launch wrappercamerabinsrc mode=2  ! video/x-raw, width=320,
> height=240 !  ximagesink *
> *
> *
> *
> *
> *but I just get a still image displayed.*
> *
> *
> *Can anyone tell me why for the second line, I just got a still image,
> and how to get a video playback?*
>
>
>
> "
> What's more,  anyone known if there is any camerasrc and audiosrc on
> Android?   If h264 encoding  plugin available on android?
>
>
> Thank you very much !
>
>
> Best Regards,
> Haiming Wang
>
> ------------------------------
> From: whm_buaa at hotmail.com
> To: gstreamer-devel at lists.freedesktop.org
> Subject: video-capture on Mac OSX
> Date: Sun, 14 Apr 2013 00:05:00 +0800
>
> Hi ,
>
>    I am now trying to record video from camera on my Mac Osx and playback
> it.
>
> when I use :   gst-launch wrappercamerabinsrc mode=2  ! video/x-raw,
> width=320, height=240 !  osxvideosink
>
> it just give me a sigv and get-launch enter spinning..
>
>
> When I used below command line:
>
>   gst-launch wrappercamerabinsrc mode=2  ! video/x-raw, width=320,
> height=240 !  ximagesink
>
>
> but I just get a still image displayed.
>
> Can anyone tell me why for the second line, I just got a still image, and
> how to get a video playback?
>
>
> I really appreciate your  help.
>
>
> Thanks and Regards,
> Haiming Wang
>
>
>
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>
> --
>
> Jack Jansen, <Jack.Jansen at cwi.nl>, http://www.cwi.nl/~jack
>
> If I can't dance I don't want to be part of your revolution -- Emma Goldman
>
>
>
>
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