jit.qt.movie
Play or edit a movie
Description
Use the jit.movie for working with movie files - playback, editing, import, export, effect generation and direct-to-video-output-component streaming.
Discussion
This document refers to the qt engine version of jit.movie.
Matrix Operator
| Name | IOProc | Planelink | Typelink | Dimlink | Plane | Dim | Type |
|---|---|---|---|---|---|---|---|
| out | n/a | 1 | 1 | 1 | 4 | 1 | char |
More about Matrix Operators
The Jitter MOP
Since the matrix is Jitter's focus, it is not surprising that the majority of Jitter objects fall in this category of Matrix Operators. Every Matrix operator has some number of matrix inputs and some number of matrix outputs. Matrix inputs are referred to by the names "in", "in2", "in3", etc., from left to right, and matrix outputs are referred to by the names "out", "out2", "out3", etc., from left to right--i.e. the names are appended by the input/output number except for the first (leftmost) input and first (leftmost) output which are simply named "in" and "out". We will refer to the input or output name names as the "I/O-name".
Matrix inputs and outputs typically each have their own matrices internally where information is kept. This is necessary because Jitter is an asynchronous framework (i.e. all the matrices don't arrive at all inputs at the same time). Various aspects of matrix inputs and outputs can be set using the command [I/O-name] combined with one of the following suffixes: "_dim" which will set the dimensions of the specified I/O matrix, "_type" which will set the type of the specified matrix, "_planecount" which will set the plane of the specified matrix, or "_name" which will set the name of the specified matrix. There is one special case which does not have an internal matrix and this is the first input "in". This is the case since this special input actually triggers the calculation of the matrix operator, so it doesn't need to be cached until a calulation takes place, unlike the other inputs. Therefore there is no mechanism to set the dim, planecount, type, or name of "in".
Matrix operators accept what we'll refer to as "matrix args"--i.e. [planecount (int)] [ type (symbol)] [dim (int list)] . if these arguments are present, the adapt attribute will be turned off, otherwise it will be turned on. If adapt mode is turned on, each time a matrix is received in the first input, there will also be the equivalent of setting the dim , planecount , and type attributes to that of the input matrix. If the other inputs and outputs are linked to these attributes, this will affect their linked attributes as well. See the "MOP" table to determine which inputs and outputs will be linked to which attributes when adapt mode is turned on. For the leftmost input this is not applicable, and hence all columns are labelled "n/a".
The jit.matrix object is a named matrix which may be used to matrix data storage and retrieval, resampling, and matrix type and planecount conversion operations.
MOP Arguments
planecount[int]
optional
Explicitly sets the number of planes for the output and any righthand inputs. If this is absent, the Matrix Operator will typically adapt to the lefthand incoming matrix attributes, except for special case operators.
type[symbol]
optional
Explicitly sets the type of the matrix for the output and any righthand inputs. If this is absent, the Matrix Operator will typically adapt to the lefthand incoming matrix attributes, except for special case operators.
dimensions[list]
optional
Explicitly sets the dimensions of the matrix for the output and any righthand inputs. If this is absent, the Matrix Operator will typically adapt to the lefthand incoming matrix attributes, except for special case operators.
MOP Attributes
adapt[int]
Matrix adaptation flag (default = 0 if matrix arguments are present, otherwise 1) When the flag is set, the jit.matrix object will adapt to the incoming matrix planecount, type, and dimensions.
[in/out]_dim[32 ints]
The matrix data dimensions (default = 1 1)
[in/out]_name[symbol]
The input or output name of the matrix (default = UID)
[in/out]_planecount[int]
The number of planes in matrix input our output data. Except in special cases, this value is equal to the planecount .
[in/out]_type[symbol]
The input or output matrix data type. Except in special cases, this value is equal to type .
outputmode[int]
Output mode (default = 1 (calculate and output matrix))
0 = No output (no calculation)
1 = Calculate and output the matrix
2 = Pass input (no calculation)
3 = Pass output (no calculation)
type[int]
The matrix data type (default = char
Supported data types are char , long , float32 , or float64 .
MOP Messages
bang
Equivalent to the outputmatrix message.
clear
Sets all cell values in a matrix to zero.
exportattrs
Exports an object's current attributes values in XML format. If no filename is specified, a file dialog will open to let you choose a file.
- filename
[symbol]
getattributes
Sends a sequence of lists out the object's right outlet describing the object's attributes, one line per attribute. Each line listing takes the form attribute attribute-name get get-value set foo set-value data-type(s) number-of-values .
getstate
Sends a sequence of lists describing the object's state out the object's right outlet, one line per attribute. Each line listing line takes the form attribute-name attribute-value1 attribute-value2 ... attribute-valueN .
importattrs
Imports attributes specified in XML format to set the object's attributes. If no filename is specified, a file dialog will open to let you choose a file.
- filename
[symbol]
jit_matrix
Handles input for the named matrix. If this messages is received in the left inlet, output is typically triggered. If this message is received in any other inlet, the data is typically cached until the jit_matrix message is received in the left inlet.
- matrix-name
[symbol]
outputmatrix
Sends the matrix out the left outlet.
summary
Sends a sequence of lists describing the object and it attributes and messages out the rightmost outlet of the object. The first output line takes the form summary objectname object-name . The second and third lines describe the number of inlets and outlets for the object in the form summary (matrixinputcount/matrixoutletcount) number-of-(inlets/outlets) . The fourth line describes the matrixoutput in the form summary matrixoutput descriptor planelink planelink-value typelink typelink-value dimlink dimlink-value types data-type(s) . Each attribute for the object is then listed, one attribute per line. Each line listing takes the form summary attribute attribute-name attribute-value1 attribute-value2 ... attribute-valueN .
Attributes
adapt[int]
Adapt output matrix dimensions to movie size flag
automatic[int]
Enable automatic matrix output when bound to jit.world.
autostart[int]
Autoplay on movie open flag (default = 1)
colormode[symbol]
The output matrix's color encoding. 32 bit only.
Possible values:
'argb'
(
ARGB (alpha, red, green, blue) colormode
)
'uyvy'
(
UYVY (YUV 4:2:2 packed) colormode
)
drawto[symbol]
A render context name, used when output_texture is enabled.
dstrect[4 ints]
The portion of the output matrix used for decompressing media to the internal matrix (default = 0 0 (matrix width) (matrix height))
The bounds of the rectangle are expressed in the form left top right bottom . All values are relative to the top-left corner of the viewing area of the output matrix.
duration[int]
The duration of the movie. When setting the duration, the entire movie will be scaled to the new length, unless the additional argument noscale is used. In that case, the movie length is changed without scaling. For more precise control of scaling, use the scale message.
engine[symbol]
Video engine backend. This argument can only be set in the max box. If not specified, it is determined by the Video Engine Max preference. As of this writing, possible values include avf (Mac only) and qt .
fps[float]
read-only
Internal FPS for the movie
framecount[int]
read-only
Number of frames in the movie
framereport[int]
Frame reporting flag (default = 0). When enabled, the message framecalc will be sent from the rightmost outlet of the jit.movie object as each frame is processed, followed by the number of milliseconds spent doing so.
interp[int]
Output interpolation flag
loop[int]
Looping mode (default = 1 (start to end))
Possible values:
0 = 'off'
(
0 = no looping
)
1 = 'normal'
(
1 = normal looping (start to end)
)
2 = 'palindrome'
(
2 = palindrome looping (start to end to start to ....)
)
3 = 'playback-limits'
(
3 = no looping, but use looppoints to define playback limits
)
loopend[int]
The movie loop point end. Time is specified as time values.
looppoints[2 ints]
The movie loop points. Time is specified as time values.
loopreport[int]
Loop notification flag (default = 0). When enabled, the jit.movie object will send the message loopnotify when the playing movie passes the loop point. In palindrome looping mode, the message will be sent at both the beginning and the end of the movie.
loopstart[2 ints]
The movie loop point start. Time is specified as time values.
movie_dim[int]
read-only
Native movie dimensions
moviedim[int]
read-only
Native movie dimensions
moviefile[symbol]
Load a movie file from disk
moviename[symbol]
Identifies the file name of a movie (Note: setting this attribute does not load a movie file).
moviepath[symbol]
read-only
The movie's fully-specified path on disk, if the movie has a disk-file (Note: setting this attribute does not load a movie file).
output_texture[int]
Enable OpenGL texture output (default = 0). When enabled an OpenGL texture is output instead of a Jitter matrix. The object's drawto attribute must be set to a valid gl context. An RGBA texture is output using the movie's native dimensions. When enabled, the following attributes have no effect:
adapt
colormode
dim
dstrect
srcrect
usedstrect
usesrcrect
rate[float]
Movie rate
srcrect[4 ints]
The portion of the movie to decompress into a matrix (default = 0 0 (movie width) (movie height)). The bounds of the rectangle are expressed in the form left top right bottom . All values are relative to the top-left corner of the viewing area of the movie.
texture_name[symbol]
Output texture name, when output_texture is enabled.
time[int]
The current time in the movie. Time is specified as time values.
timescale[int]
read-only
The timescale for the movie (default = 600, but movie-dependent)
unique[int]
Unique frame filter flag (default = 0 (disabled)). When the flag is set, only new frames from the movie are output when the object receives a bang. If no new frame has been decompressed, the jit.movie object will not respond to the bang.
usedstrect[int]
Destination rect flag (default = 0). When the flag is set, the dstrect attributes are used when copying an input matrix to the internal matrix.
usesrcrect[int]
Source rect flag (default = 0). When the flag is set, the srcrect attributes are used when copying an input matrix to the internal matrix.
vol[float]
Movie sound volume
time_secs[float]
7.0.0
Time Seconds
time_ms[int]
8.0.0
Time Milliseconds
seconds[float]
read-only7.0.0
Seconds
position[float]
7.0.0
Position
milliseconds[int]
read-only8.0.0
Milliseconds
looppoints_secs[2 floats]
8.0.0
Looppoints Seconds
looppoints_ms[2 ints]
8.0.0
Looppoints Milliseconds
Common Box Attributes
annotation[symbol]
Sets the text that will be displayed in the Clue window when the user moves the mouse over the object.
background[int]: 0
Adds or removes the object from the patcher's background layer. background 1 adds the object to the background layer, background 0 removes it. Objects in the background layer are shown behind all objects in the default foreground layer.
color[4 floats]
Sets the color for the object box outline.
fontface[int]
Sets the type style used by the object. The options are:
plain
bold
italic
bold italic
Possible values:
0 = 'regular'
1 = 'bold'
2 = 'italic'
3 = 'bold italic'
fontname[symbol]
Sets the object's font.
fontsize[float]
Sets the object's font size (in points).
Possible values:
'8'
'9'
'10'
'11'
'12'
'13'
'14'
'16'
'18'
'20'
'24'
'30'
'36'
'48'
'64'
'72'
hint[symbol]
Sets the text that will be displayed in as a pop-up hint when the user moves the mouse over the object in a locked patcher.
ignoreclick[int]: 0
Toggles whether an object ignores mouse clicks in a locked patcher.
jspainterfile[symbol]
JS Painter File
patching_rect[4 floats]: 0. 0. 100. 0.
Sets the position and size of the object in the patcher window.
position[2 floats]
write-only
Sets the object's x and y position in both patching and presentation modes (if the object belongs to its patcher's presentation), leaving its size unchanged.
presentation[int]: 0
Sets whether an object belongs to the patcher's presentation.
presentation_rect[4 floats]: 0. 0. 0. 0.
Sets the x and y position and width and height of the object in the patcher's presentation, leaving its patching position unchanged.
rect[4 floats]
write-only
Sets the x and y position and width and height of the object in both patching and presentation modes (if the object belongs to its patcher's presentation).
size[2 floats]
write-only
Sets the object's width and height in both patching and presentation modes (if the object belongs to its patcher's presentation), leaving its position unchanged.
textcolor[4 floats]
Sets the color for the object's text in RGBA format.
textjustification[int]
Sets the justification for the object's text.
Possible values:
0 = 'left'
1 = 'center'
2 = 'right'
varname[symbol]
Sets the patcher's scripting name, which can be used to address the object by name in pattr, scripting messages to thispatcher, and the js object.
Messages
read
Reads a movie from a disk file, URL or the clipboard. If no argument is present, or if the symbol dialog is used for the src-name argument, a file selection dialog will be presented to choose a file. If the argument scrap is used for the src-name argument, the object will attempt to load a movie from the clipboard. If the argument is parsable as an http://, ftp:///, file://, or rtsp:// URL, the object will attempt to load a movie from that location. Otherwise, an argument is assumed to be a local file name.
If autostart is enabled, the movie will begin playing at once.
- src-name
[symbol]
framedump
Commences a framedump, in which the movie will start from a frame specified by start-frame (the default is 1) and automatically output frames in sequence (no bang or outputmatrix message is necessary) up to the frame specified by end-frame , skipping frame-skip frames between each frame. The default values are 1 for the start frame, and the total framecount of the movie for the end frame. The default frame-skip value is 1.
During operation, the message framedump current_frame is sent out the right outlet after each frame has been output. When finished, the message framedump done is output.
- start-frame
[int]
- end-frame
[int]
- frame-skip
[int]
cancelframedump
Stops the frame dump process. See framedump .
asyncread
Asynchronously reads a movie from a disk file, if possible. If no argument is present, or if the symbol dialog is used for the src-name argument, a file selection dialog will be presented to choose a file. Any argument is assumed to be a local file name. At this time, asynchronous reading is not supported for URL- or clipboard-based movies; the normal read behavior will be used instead.
- src-name
[symbol]
(drag)
Load a media file
See Also
| Name | Description |
|---|---|
| jit.grab | Digitize video from an external source |
| jit.record | Record a movie |