[gst-devel] Format ofYUY2 stream

[Wim Taymans]

On Tue, 2008-11-11 at 16:23 -0500, OB Lutz wrote:
> Hey all
> 
> I'm attempting to write an application that will send a YUV (YUY2)
> stream out on udp and have gstreamer take it in and do some
> precessing. For starters, I'm trying to simply view the output with:
> 
> gst-launch -v udpsrc port=1234 buffer-size=0 !
> video/x-raw-yuv,format=\(fourcc\)YUY2,width=640,height=480,framerate=25/1
> ! ffmpegcolorspace ! xvimagesink sync=false

You could use the raw video rtp (de)pay loaders together with udp, like
this:

  gst-launch videotestsrc ! rtpvrawpay ! udpsink

and

  gst-launch udpsrc caps="application/x-rtp, media=(string)video,
  clock-rate=(int)90000, encoding-name=(string)RAW, 
  sampling=(string)YCbCr-4:2:2, depth=(string)8, width=(string)320,
  height=(string)240, colorimetry=(string)SMPTE240M" ! rtpvrawdepay !
  xvimagesink

YUYV is unfortunatly not a supported format for RFC 4175 but UYVY is.

Wim

> 
> Only problem is I don't know how the stream should be formated. All I
> get is a green window with a few garbled rows of pixels at the top.
> I'm writing out YUYV, where each part one is a 8bit uint for YUYV
> being a full 32 bits. Are there some sort of header information that
> need to be sent along with this? Is there a site that details the
> format of the stream, better yet as it pertains to a UDP stream?
> 
> Thanks
> 
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