[MPlayer-users] Sliced Image when grabbing from v4l2

[Reto E. Koenig]

Hey thanks for answering me!

Well I tried, what you suggested and realized, that xawtv seems to be running 
without overlay, but still is able to produce the desired output.

That's what it says...

This is xawtv-3.94, running on Linux/i686 (2.6.12-kanotix-1)
WARNING: Your X-Server has no DGA support.
/dev/video0 [v4l2]: no overlay support
v4l-conf had some trouble, trying to continue anyway

I must say, that the module, I am using is very! experimental, but still, 
after having had success on xawtv, I thought mplayer could cope with it too!?

If of any use, this is the v4l-info:

### v4l2 device info [/dev/video0] ###
general info
    VIDIOC_QUERYCAP
        driver                  : "em2800"
        card                    : "Terratec Cinergy 200 USB"
        bus_info                : "4-1"
        version                 : 0.0.1
        capabilities            : 0x5010001 
[VIDEO_CAPTURE,TUNER,READWRITE,STREAMING]

standards
    VIDIOC_ENUMSTD(0)
        index                   : 0
        id                      : 0xff 
[PAL_B,PAL_B1,PAL_G,PAL_H,PAL_I,PAL_D,PAL_D1,PAL_K]
        name                    : "PAL"
        frameperiod.numerator   : 1
        frameperiod.denominator : 25
        framelines              : 625
    VIDIOC_ENUMSTD(1)
        index                   : 1
        id                      : 0x3000 [NTSC_M,NTSC_M_JP]
        name                    : "NTSC"
        frameperiod.numerator   : 1001
        frameperiod.denominator : 30000
        framelines              : 525
    VIDIOC_ENUMSTD(2)
        index                   : 2
        id                      : 0x7f0000 
[SECAM_B,SECAM_D,SECAM_G,SECAM_H,SECAM_K,SECAM_K1,SECAM_L]
        name                    : "SECAM"
        frameperiod.numerator   : 1
        frameperiod.denominator : 25
        framelines              : 625

inputs
    VIDIOC_ENUMINPUT(0)
        index                   : 0
        name                    : "Composite"
        type                    : unknown
        audioset                : 0
        tuner                   : 0
        std                     : 0x0 []
        status                  : 0x0 []
    VIDIOC_ENUMINPUT(1)
        index                   : 1
        name                    : "S-Video"
        type                    : unknown
        audioset                : 0
        tuner                   : 0
        std                     : 0x0 []
        status                  : 0x0 []
    VIDIOC_ENUMINPUT(2)
        index                   : 2
        name                    : "Tuner"
        type                    : unknown
        audioset                : 0
        tuner                   : 0
        std                     : 0x0 []
        status                  : 0x0 []

tuners
    VIDIOC_G_TUNER(0)
        index                   : 0
        name                    : "Television"
        type                    : unknown
        capability              : 0x2 [NORM]
        rangelow                : 0
        rangehigh               : 4294967295
        rxsubchans              : 0x0 []
        audmode                 : MONO
        signal                  : 65535
        afc                     : 0

video capture
    VIDIOC_ENUM_FMT(0,VIDEO_CAPTURE)
        index                   : 0
        type                    : VIDEO_CAPTURE
        flags                   : 0
        description             : "Packed YUY2"
        pixelformat             : 0x56595559 [YUYV]
    VIDIOC_G_FMT(VIDEO_CAPTURE)
        type                    : VIDEO_CAPTURE
        fmt.pix.width           : 360
        fmt.pix.height          : 270
        fmt.pix.pixelformat     : 0x56595559 [YUYV]
        fmt.pix.field           : NONE
        fmt.pix.bytesperline    : 720
        fmt.pix.sizeimage       : 194400
        fmt.pix.colorspace      : SMPTE170M
        fmt.pix.priv            : 0

controls
    VIDIOC_QUERYCTRL(BASE+0)
        id                      : 9963776
        type                    : INTEGER
        name                    : "brightness"
        minimum                 : -128
        maximum                 : 127
        step                    : 1
        default_value           : 0
        flags                   : 0
    VIDIOC_QUERYCTRL(BASE+1)
        id                      : 9963777
        type                    : INTEGER
        name                    : "contrast"
        minimum                 : 0
        maximum                 : 31
        step                    : 1
        default_value           : 16
        flags                   : 0
    VIDIOC_QUERYCTRL(BASE+2)
        id                      : 9963778
        type                    : INTEGER
        name                    : "saturation"
        minimum                 : 0
        maximum                 : 31
        step                    : 1
        default_value           : 16
        flags                   : 0

### video4linux device info [/dev/video0] ###
general info
    VIDIOCGCAP
        name                    : "Terratec Cinergy 200 USB"
        type                    : 0x3 [CAPTURE,TUNER]
        channels                : 3
        audios                  : 0
        maxwidth                : 360
        maxheight               : 288
        minwidth                : 48
        minheight               : 32

channels
    VIDIOCGCHAN(0)
        channel                 : 0
        name                    : "Composite"
        tuners                  : 0
        flags                   : 0x0 []
        type                    : CAMERA
        norm                    : 0
    VIDIOCGCHAN(1)
        channel                 : 1
        name                    : "S-Video"
        tuners                  : 0
        flags                   : 0x0 []
        type                    : CAMERA
        norm                    : 0
    VIDIOCGCHAN(2)
        channel                 : 2
        name                    : "Tuner"
        tuners                  : 0
        flags                   : 0x0 []
        type                    : CAMERA
        norm                    : 0

tuner
    VIDIOCGTUNER
        tuner                   : 0
        name                    : "Television"
        rangelow                : 0
        rangehigh               : 4294967295
        flags                   : 0x7 [PAL,NTSC,SECAM]
        mode                    : PAL
        signal                  : 65535

audio
ioctl VIDIOCGAUDIO: Invalid argument

picture
    VIDIOCGPICT
        brightness              : 41120
        hue                     : 0
        colour                  : 33825
        contrast                : 33825
        whiteness               : 0
        depth                   : 56805
        palette                 : YUYV

buffer
ioctl VIDIOCGFBUF: Invalid argument

window
    VIDIOCGWIN
        x                       : 0
        y                       : 0
        width                   : 360
        height                  : 270
        chromakey               : 0
        flags                   : 0


On Saturday, 6. August 2005 11.36, Reimar Döffinger wrote:
> Hi,
>
> On Fri, Aug 05, 2005 at 10:48:51PM +0200, Reto E. Koenig wrote:
> > Sliced image while capturing with mplayer
> >
> > Capturing with my Video-Capture-Device, a USB2-Stick from Q-Sonics
> > (probably Terratec Cinergy 200 USB) I get a really nice picture when
> > using something like xawtv. But using mplayer (mplayer tv:// -tv
> > driver=v4l2 -vo xv) I get a
>
> xawtv uses overlay mode by default, try setting it to grabimage first.
> If you get the same problem then, it is a bug in the grabbing part of
> your v4l2 driver.
>
> Greetings,
> Reimar Döffinger
>
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