Provided by: qvidcap_1.24.1-3_amd64 bug

NAME

       qvidcap - A v4l2 video capture viewer

SYNOPSIS

       qvidcap [<options>]

DESCRIPTION

       The qvidcap tool is used to test video4linux capture devices, either using a video device,
       a file, or over network. This application can also serve  as  a  generic  video/TV  viewer
       application.

       It does not (yet) support compressed video streams other than MJPEG

OPTIONS

       -d, --device=<dev>
              Use  device <dev> as the video device if <dev> is a number, then /dev/video<dev> is
              used

       -f, --file=<file>
              Read from the file <file> for the raw frame data

       -p, --port[=<port>]
              Listen for a network connection on the given port. The default port is 8362

       -T, --tpg
              Use the test pattern generator. If neither -d, -f nor  -T  is  specified  then  use
              /dev/video0.

       -c, --count=<cnt>
              Stop after <cnt> captured frames

       -b, --buffers=<bufs>
              Request <bufs> buffers (default 4) when streaming from a video device.

       -s, --single-step[=<frm>]
              Starting  with  frame  <frm>  (default  1), pause after displaying each frame until
              Space is pressed.

       -C, --colorspace=<c>
              Override colorspace. <c> can  be  one  of  the  following  colorspaces:  smpte170m,
              smpte240m, rec709, 470m, 470bg, jpeg, srgb, oprgb, bt2020, dcip3

       -X, --xfer-func=<x>
              Override  transfer  function.  <x>  can be one of the following transfer functions:
              default, 709, srgb, oprgb, smpte240m, smpte2084, dcip3, none

       -Y, --ycbcr-enc=<y>
              Override Y'CbCr encoding. <y>  can  be  one  of  the  following  Y'CbCr  encodings:
              default, 601, 709, xv601, xv709, bt2020, bt2020c, smpte240m

       -Q, --quant=<q>
              Override  quantization.  <q>  can  be  one  of  the following quantization methods:
              default, full-range, lim-range

       -P, --pixelformat=<p>
              For video devices: set the format to this pixel format.  For reading from  a  file:
              interpret  the data using this pixel format setting.  Ignored for other modes.  Use
              -l to see the list of supported pixel formats.

       -l, --list-formats
              Display all supported formats

       -h, --help
              Display this help message

       -t, --timings
              Report frame render timings

       -v, --verbose
              Be more verbose

       -R, --raw
              Open device in raw mode

       --opengl
              Force openGL to display the video

       --opengles
              Force openGL ES to display the video

       The following options are ignored when capturing from a video device:

       -W,--width=<width>
              Set width

       -H,--height=<height>
              Set frame (not field!) height

       -A,--padding=<bytes>
              set additional horizontal padding (after width)

       --fps=<fps>
              Set frames-per-second (default is 30)

       The following option is only valid when reading from a file:

       -F, --field=<f>
              Override field setting. <f> can be one of the following field layouts:  any,  none,
              top, bottom, interlaced, seq_tb, seq_bt, alternate, interlaced_tb, interlaced_bt

       The following options are specific to the test pattern generator:

       --list-patterns
              List available patterns for use with --pattern

       --pattern=<pat>
              Choose output test pattern, the default is 0

       --square
              Show a square in the middle of the output test pattern

       --border
              Show a border around the pillar/letterboxed video

       --sav  Insert an SAV code in every line

       --eav  Insert an EAV code in every line

       --pixel-aspect=<aspect>
              Select  a pixel aspect ratio, the default is to autodetect. <aspect> can be one of:
              square, ntsc, pal

       --video-aspect=<aspect>
              Select a video aspect ratio, the default is to use the frame ratio. <aspect> can be
              one of: 4  x3, 14x9, 16x9, anamorphic

       --alpha=<alpha-value>
              Value to use for the alpha component, range 0-255, the default is 0

       --alpha-red-only
              Only use the --alpha value for the red colors, for all others use 0

       --rgb-lim-range
              Encode RGB values as limited [16-235] instead of full range

       --hor-speed=<speed>
              Choose speed for horizontal movement, the default is 0 and the range is [-3...3]

       --vert-speed=<speed>
              Choose speed for vertical movement, the default is 0 and the range is [-3...3]

       --perc-fill=<percentage>
              Percentage of the frame to actually fill. the default is 100%

       These options use the test pattern generator to test the OpenGL backend:

       --test=<count>
              Test all formats, each test generates <count> frames.

       --test-mask=<mask>
              Mask which tests are performed. <mask> is a bit mask with these values:
              0x01: Mask iterating over pixel formats
              0x02: Mask iterating over fields
              0x04: Mask iterating over colorspaces
              0x08: Mask iterating over transfer functions
              0x10: Mask iterating over Y'CbCr encodings
              0x20: Mask iterating over quantization ranges

HOTKEYS

       Q      Quit application.

       P      Cycle  forwards through all the supported pixel formats.  With Shift pressed: cycle
              backwards.  With Ctrl pressed: restore the original pixel format.   Only  available
              with --file.

       I      Cycle  forwards  through  all  the supported interlaced field settings.  With Shift
              pressed: cycle backwards.  With Ctrl pressed: restore the original interlaced field
              setting.  Only available with --file.

       C      Cycle  forwards  through  all the supported colorspaces.  With Shift pressed: cycle
              backwards.  With Ctrl pressed: restore the original colorspace.

       X      Cycle forwards through all the supported transfer functions.  With  Shift  pressed:
              cycle backwards.  With Ctrl pressed: restore the original transfer function.

       Y      Cycle  forwards  through  all  the supported Y'CbCr encodings.  With Shift pressed:
              cycle backwards.  With Ctrl pressed: restore the original Y'CbCr encoding.

       H      Cycle forwards through all the supported HSV encodings.  With Shift pressed:  cycle
              backwards.  With Ctrl pressed: restore the original HSV encoding.

       R      Cycle  forwards through all the supported quantization ranges.  With Shift pressed:
              cycle backwards.  With Ctrl pressed: restore the original quantization range.

       Right-Click
              Open menu.

       Double left-click
              Toggle fullscreen on and off.

       F      Toggle fullscreen on and off.

       ESC    Exit fullscreen.

       Space  When in test mode (--test) pressing Space will skip to the next test.  When single-
              stepping, continue to the next frame.

       Up     Reduce  the  resolution  by  two  pixels  in  height. Only available when "Override
              resolution" is enabled.

       Down   Increase the resolution by two pixels in  height.  Only  available  when  "Override
              resolution" is enabled.

       Left   Reduce  the  resolution  by  two  pixels  in  width.  Only available when "Override
              resolution" is enabled.

       Right  Increase the resolution by two pixels  in  width.  Only  available  when  "Override
              resolution" is enabled.

EXIT STATUS

       On success, it returns 0. Otherwise, it will return the number of errors.

BUGS

       Report bugs to Hans Verkuil <hverkuil@xs4all.nl>