smpte

smpte can accept I420 video streams with the same width, height and framerate. The two incoming buffers are blended together using an effect specific alpha mask.

The GstSMPTE:depth property defines the presision in bits of the mask. A higher presision will create a mask with smoother gradients in order to avoid banding.

Sample pipelines

 gst-launch-1.0 -v videotestsrc pattern=1 ! smpte name=s border=20000 type=234 duration=2000000000 ! videoconvert ! ximagesink videotestsrc ! s.

A pipeline to demonstrate the smpte transition. It shows a pinwheel transition a from a snow videotestsrc to an smpte pattern videotestsrc. The transition will take 2 seconds to complete. The edges of the transition are smoothed with a 20000 big border.

Hierarchy

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──smpte

Factory details

Authors: – Wim Taymans

Classification:Filter/Editor/Video

Rank – none

Plugin – smpte

Package – GStreamer Good Plug-ins

Pad Templates

sink1

video/x-raw:
         format: I420
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]

Presencealways

Directionsink

Object typeGstPad


sink2

video/x-raw:
         format: I420
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]

Presencealways

Directionsink

Object typeGstPad


src

video/x-raw:
         format: I420
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]

Presencealways

Directionsrc

Object typeGstPad


Properties

border

“border” gint

The border width of the transition

Flags : Read / Write

Default value : 0


depth

“depth” gint

Depth of the mask in bits

Flags : Read / Write

Default value : 16


duration

“duration” guint64

Duration of the transition effect in nanoseconds

Flags : Read / Write

Default value : 1000000000


invert

“invert” gboolean

Invert transition mask

Flags : Read / Write

Default value : false


type

“type” Smptetransition-type *

The type of transition to use

Flags : Read / Write

Default value : bar-wipe-lr (1)


Named constants

Smptetransition-type

Members

bar-wipe-lr (1) – A bar moves from left to right
bar-wipe-tb (2) – A bar moves from top to bottom
box-wipe-tl (3) – A box expands from the upper-left corner to the lower-right corner
box-wipe-tr (4) – A box expands from the upper-right corner to the lower-left corner
box-wipe-br (5) – A box expands from the lower-right corner to the upper-left corner
box-wipe-bl (6) – A box expands from the lower-left corner to the upper-right corner
four-box-wipe-ci (7) – A box shape expands from each of the four corners toward the center
four-box-wipe-co (8) – A box shape expands from the center of each quadrant toward the corners of each quadrant
barndoor-v (21) – A central, vertical line splits and expands toward the left and right edges
barndoor-h (22) – A central, horizontal line splits and expands toward the top and bottom edges
box-wipe-tc (23) – A box expands from the top edge's midpoint to the bottom corners
box-wipe-rc (24) – A box expands from the right edge's midpoint to the left corners
box-wipe-bc (25) – A box expands from the bottom edge's midpoint to the top corners
box-wipe-lc (26) – A box expands from the left edge's midpoint to the right corners
diagonal-tl (41) – A diagonal line moves from the upper-left corner to the lower-right corner
diagonal-tr (42) – A diagonal line moves from the upper right corner to the lower-left corner
bowtie-v (43) – Two wedge shapes slide in from the top and bottom edges toward the center
bowtie-h (44) – Two wedge shapes slide in from the left and right edges toward the center
barndoor-dbl (45) – A diagonal line from the lower-left to upper-right corners splits and expands toward the opposite corners
barndoor-dtl (46) – A diagonal line from upper-left to lower-right corners splits and expands toward the opposite corners
misc-diagonal-dbd (47) – Four wedge shapes split from the center and retract toward the four edges
misc-diagonal-dd (48) – A diamond connecting the four edge midpoints simultaneously contracts toward the center and expands toward the edges
vee-d (61) – A wedge shape moves from top to bottom
vee-l (62) – A wedge shape moves from right to left
vee-u (63) – A wedge shape moves from bottom to top
vee-r (64) – A wedge shape moves from left to right
barnvee-d (65) – A 'V' shape extending from the bottom edge's midpoint to the opposite corners contracts toward the center and expands toward the edges
barnvee-l (66) – A 'V' shape extending from the left edge's midpoint to the opposite corners contracts toward the center and expands toward the edges
barnvee-u (67) – A 'V' shape extending from the top edge's midpoint to the opposite corners contracts toward the center and expands toward the edges
barnvee-r (68) – A 'V' shape extending from the right edge's midpoint to the opposite corners contracts toward the center and expands toward the edges
iris-rect (101) – A rectangle expands from the center.
clock-cw12 (201) – A radial hand sweeps clockwise from the twelve o'clock position
clock-cw3 (202) – A radial hand sweeps clockwise from the three o'clock position
clock-cw6 (203) – A radial hand sweeps clockwise from the six o'clock position
clock-cw9 (204) – A radial hand sweeps clockwise from the nine o'clock position
pinwheel-tbv (205) – Two radial hands sweep clockwise from the twelve and six o'clock positions
pinwheel-tbh (206) – Two radial hands sweep clockwise from the nine and three o'clock positions
pinwheel-fb (207) – Four radial hands sweep clockwise
fan-ct (211) – A fan unfolds from the top edge, the fan axis at the center
fan-cr (212) – A fan unfolds from the right edge, the fan axis at the center
doublefan-fov (213) – Two fans, their axes at the center, unfold from the top and bottom
doublefan-foh (214) – Two fans, their axes at the center, unfold from the left and right
singlesweep-cwt (221) – A radial hand sweeps clockwise from the top edge's midpoint
singlesweep-cwr (222) – A radial hand sweeps clockwise from the right edge's midpoint
singlesweep-cwb (223) – A radial hand sweeps clockwise from the bottom edge's midpoint
singlesweep-cwl (224) – A radial hand sweeps clockwise from the left edge's midpoint
doublesweep-pv (225) – Two radial hands sweep clockwise and counter-clockwise from the top and bottom edges' midpoints
doublesweep-pd (226) – Two radial hands sweep clockwise and counter-clockwise from the left and right edges' midpoints
doublesweep-ov (227) – Two radial hands attached at the top and bottom edges' midpoints sweep from right to left
doublesweep-oh (228) – Two radial hands attached at the left and right edges' midpoints sweep from top to bottom
fan-t (231) – A fan unfolds from the bottom, the fan axis at the top edge's midpoint
fan-r (232) – A fan unfolds from the left, the fan axis at the right edge's midpoint
fan-b (233) – A fan unfolds from the top, the fan axis at the bottom edge's midpoint
fan-l (234) – A fan unfolds from the right, the fan axis at the left edge's midpoint
doublefan-fiv (235) – Two fans, their axes at the top and bottom, unfold from the center
doublefan-fih (236) – Two fans, their axes at the left and right, unfold from the center
singlesweep-cwtl (241) – A radial hand sweeps clockwise from the upper-left corner
singlesweep-cwbl (242) – A radial hand sweeps counter-clockwise from the lower-left corner.
singlesweep-cwbr (243) – A radial hand sweeps clockwise from the lower-right corner
singlesweep-cwtr (244) – A radial hand sweeps counter-clockwise from the upper-right corner
doublesweep-pdtl (245) – Two radial hands attached at the upper-left and lower-right corners sweep down and up
doublesweep-pdbl (246) – Two radial hands attached at the lower-left and upper-right corners sweep down and up
saloondoor-t (251) – Two radial hands attached at the upper-left and upper-right corners sweep down
saloondoor-l (252) – Two radial hands attached at the upper-left and lower-left corners sweep to the right
saloondoor-b (253) – Two radial hands attached at the lower-left and lower-right corners sweep up
saloondoor-r (254) – Two radial hands attached at the upper-right and lower-right corners sweep to the left
windshield-r (261) – Two radial hands attached at the midpoints of the top and bottom halves sweep from right to left
windshield-u (262) – Two radial hands attached at the midpoints of the left and right halves sweep from top to bottom
windshield-v (263) – Two sets of radial hands attached at the midpoints of the top and bottom halves sweep from top to bottom and bottom to top
windshield-h (264) – Two sets of radial hands attached at the midpoints of the left and right halves sweep from left to right and right to left

The results of the search are