split the raw pixel stream from stereo camera with gstreamer

[jles]

Hello,

I'm trying to interface an stereo vision UVC camera using gstreamer under an
embedded linux system (yocto based).

I can see the camera as a single device in /dev (/dev/video0) and I can see
the supported formats:

    root at petalinux:~# v4l2-ctl --device /dev/video0 --list-formats-ext
    ioctl: VIDIOC_ENUM_FMT
            Index       : 0
            Type        : Video Capture
            Pixel Format: 'Y16 '
            Name        : 16-bit Greyscale
                    Size: Discrete 752x480
                            Interval: Discrete 0.017s (60.000 fps)
                            Interval: Discrete 0.033s (30.000 fps)
                    Size: Discrete 640x480
                            Interval: Discrete 0.017s (60.000 fps)
                            Interval: Discrete 0.033s (30.000 fps)
                    Size: Discrete 320x240
                            Interval: Discrete 0.017s (60.000 fps)
    
            Index       : 1
            Type        : Video Capture
            Pixel Format: 'BGR3'
            Name        : 24-bit BGR 8-8-8
                    Size: Discrete 752x480
                            Interval: Discrete 0.017s (60.000 fps)
                            Interval: Discrete 0.033s (30.000 fps)
                    Size: Discrete 640x480
                            Interval: Discrete 0.017s (60.000 fps)
                            Interval: Discrete 0.033s (30.000 fps)
                    Size: Discrete 320x240
                            Interval: Discrete 0.017s (60.000 fps)

I'm interested to get the Y16 format where according to the manufacturer the
Y16 format corresponds to both video frame pixel bytes packaged in a 16 bits
word (Y16), so the pixel stream is coming like so:  

        In Y16 (8bpp) format the Pixel arrangement :
        Byte 1 - M9 M8 M7 M6 M5 M4 M3 M2
        Byte 2 - S9 S8 S7 S6 S5 S4 S3 S2
        where: M - Master , S – Slave.

Is there any way with gstreamer that I could split the Y16 stream in two
bytes streams corresponding to each camera (left-right)? 

Thanks in advance



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