X-Git-Url: http://research.m1stereo.tv/gitweb?a=blobdiff_plain;f=docs%2Fservices.txt;h=10d25a03ba63cdeafe2498f707c7252152e4d597;hb=b49b8059af440b18c427842272f57808fc465c4f;hp=50f3caddacf8248565d632da77db5083732bde87;hpb=520454d526bdcd58f1ac6ab7532dc2529b822808;p=melted diff --git a/docs/services.txt b/docs/services.txt index 50f3cad..10d25a0 100644 --- a/docs/services.txt +++ b/docs/services.txt @@ -1,7 +1,141 @@ +SERVICES +-------- + +Services marked as "(Proprietary)" are not distributed with the GPL version +of mlt. + Producers --------- - ffmpeg + avformat + + Description + + ffmpeg libavformat based producer for video and audio. + + Constructor Argument + + 'file' - a filename specification or URL in the form: + [{protocol}|{format}]:{resource}[?{format-parameter}[&{format-parameter}]] + For example, video4linux:/dev/video1?width=320&height=240 + Note: on the bash command line, '&' must be escaped as '\&' + Use 'ffmpeg -formats' to see a list of supported protocols + and formats. + + Details + + Format parameters only appear to be useful with 'video4linux' or + 'audio_device' formats. For 'video4linux' the parameters are + width, height, frame_rate, frame_rate_base, and standard (ntsc|pal). + For 'audio_device' the parameters are channels and sample_rate. + + Initialisation Properties + + int video_index - index of video stream to use (-1 is off) + int audio_index - index of audio stream to use (-1 is off) + int in - in point + int out - out point + + Read Only Properties + + string resource - file location + double fps - this is fixed at 25 for PAL currently + double source_fps - the framerate of the resource + double aspect_ratio - sample aspect ratio of the resource + - this is determined on every frame read + + Dependencies + + ffmpeg must be configured as --enable-shared and installed prior + to compilation of mlt. + + Known Bugs + + Audio sync discrepancy with some content. + Not all libavformat supported formats are seekable. + Ogg Vorbis is currently broken. + MPEG seeking is inaccurate - doesn't seek to i-frames so you may + get junk for a few frames. + RAW DV seeking not supported. + + fezzik + + Description + + A friendly giant that likes to rhyme and throw rocks + + Constructor Argument + + 'file' - a filename specification: + [{mlt-service}:]{resource} | {mlt-service} + - can also be the name of a producer service that can + accept the resource specified post construction. + + Initialisation Properties + + int in - in point + int out - out point + + all producer initialising properties + + Read Only Properties + + string resource - file location + + all producer read only properties + + Details + + This producer is has two roles: + + 1. it handles the mappings of all file names to the other + producers; + 2. it attaches normalising filters (rescale, resize and resample) + to the producers (when necessary). + + This producer simplifies many aspects of use. Essentially, it + ensures that a consumer will receive images and audio precisely as + they request them. + + Dependencies + + all. + + Known Bugs + + None. + + + colour + + Description + + A simple colour generator. + + Constructor Argument + + colour - A colour value is a hexadecimal representation of RGB plus + alpha channel as 0xrrggbbaa. + - Also colours can be the words: white, black, red, green, + or blue. + - The default colour is black. + + Initialisation Properties + + none + + Read Only Properties + + none + + Dependencies + + none + + Known Bugs + + none + + + ffmpeg (DEPRECATED) Description @@ -24,7 +158,7 @@ Producers int audio_channels - audio channels (default: 2) int audio_track - audio track to use (default: 0) int audio_loop - loop audio until video exhausted (default: 0) - intint in - in point + int in - in point int out - out point double fps - output frames per second (default: 25) double aspect_ratio - aspect ratio of video @@ -63,8 +197,12 @@ Producers string resource - file location double fps - output frames per second - double aspect_ratio - aspect ratio of video] int length - duration of resource (in frames) + + Mutable Properties + + string quality - one of "best," "fast" or anything else chooses + medium. Dependencies @@ -72,13 +210,14 @@ Producers Known Bugs - None. + DVCPRO is incorrectly identified as 16:9 aspect ratio. You must use + libdv from CVS or a post 0.101 release. - mcdv + mcdv (Proprietary) Description - Mainconcept based dv decoder for video and audio. + MainConcept based dv decoder for video and audio. Constructor Argument @@ -93,24 +232,22 @@ Producers string resource - file location double fps - output frames per second - double aspect_ratio - aspect ratio of video int length - duration of resource (in frames) Dependencies - mainconcept dv sdk and libdv. + MainConcept DV or DVCPRO SDK, libdv. "dv_sdk" installed parallel to mlt. Known Bugs - Can be problematic with source NTSC DV files? really? yes - try - playing pond.dv... + None - mcmpeg + mcmpeg (Proprietary) Description - Mainconcept based mpeg decoder for video and audio. + MainConcept based mpeg decoder for video and audio. Constructor Argument @@ -125,12 +262,13 @@ Producers string resource - file location double fps - output frames per second - double aspect_ratio - aspect ratio of video - + double aspect_ratio - sample aspect ratio of video + int length - duration of resource (in frames) + Dependencies - mainconcept mpeg sdk. - "mpeg_sdk_demo" installed parallel to mlt. + MainConcept MPEG SDK. + "mpeg_sdk_release" installed parallel to mlt. Known Bugs @@ -146,8 +284,24 @@ Producers Constructor Argument string file - a text file containing Pango markup, see: - http://developer.gnome.org/doc/API/2.0/pango/PangoMarkupFormat.html - - requires xml-like encoding special chars: <, >, & to <, >, & + http://developer.gnome.org/doc/API/2.0/pango/PangoMarkupFormat.html + - requires xml-like encoding special chars from: + <, >, & -to- <, >, & + + Details + + Supplying a filename with extension ".txt" causes the Fezzik + producer to load with pango. If the filename begins with "+" the + pango producer interprets the filename as pango text. This is a + shortcut to embed titles in inigo commands. For westley, it is + recommended that you embed the title text in the property value. + If you need to embed Pango markup in a westley XML file, then + enclose the value inside "". + + Pango has builtin scaling. It will rescale the originally rendered + title to whatever the consumer requests. Therefore, it will lose + its aspect ratio if so requested, and it is up to the consumer to + request a proper width and height that maintains the image aspect. Initialisation Properties @@ -156,48 +310,47 @@ Producers Mutable Properties - int video_standard - enum mlt_video_standard from mlt_frame.h - PAL = 0, NTSC = 1 - this determines proper pixel aspect ratio - - string markup - a string containing Pango markup see: - http://developer.gnome.org/doc/API/2.0/pango/PangoMarkupFormat.html - - requires xml-like encoding special chars: <, >, & to <, >, & - - int fgcolor - an rgba color specification of the text (i.e. 0xrrggbbaa) - int bgcolor - an rgba color of the background rectangle - int align - paragraph alignment: 0 = left, 1 = center, 2 = right - int pad - the number of pixels to pad the background rectangle beyond edges of text - default 0 + string markup - a UTF-8 string containing Pango markup see: + http://developer.gnome.org/doc/API/2.0/pango/PangoMarkupFormat.html + - requires xml-like encoding special chars from: + <, >, & -to- <, >, & + string fgcolour - an RGBA colour specification of the text + (i.e. 0xrrggbbaa) + string bgcolour - an RGBA colour of the background rectangle + string align - paragraph alignment: left, centre, right + - also, numbers 0, 1 and 2 can be used respectively. + int pad - the number of pixels to pad the background rectangle + beyond edges of text. default 0. string markup - see constructor argument - string text - non-markup text (can contain markup chars un-encoded) - string font - the default typeface to use when not using markup - default "Sans 48" - int x - the horizontal position of the title on the frame - default 0 - int y - the vertical position of the title on the frame - default 0 - double mix - the overall opacity control of the generated title - default 1.0 + string text - non-markup string in UTF-8 encoding (can contain + markup chars un-encoded) + string font - the default typeface to use when not using markup. + default "Sans 48". FreeType2 renders at 72 dpi. Read Only Properties - string resource - the text/markup file or "pango" if no file + string resource - the text/markup file or "pango" if no file. + int real_width - the original, unscaled width of the rendered title. + int real_height - the original, unscaled height of the title. + int width - the last requested scaled image width. + int height - the last requested scaled image height. Dependencies - libpango-1.0, libpangoft2-1.0, libfreetype, libgdk_pixbuf-2.0, libglib-2.0, - libgobject-2.0, libgmodule-2.0, libfontconfig + libpango-1.0, libpangoft2-1.0, libfreetype, libgdk_pixbuf-2.0, + libglib-2.0, libgobject-2.0, libgmodule-2.0, libfontconfig. Known Bugs - no frame-alignment functionality + The foreground and background Pango markup span attributes are not + supported. + Word wrapping is not supported. pixbuf Description - A graphics overlay generator using gdk-pixbuf + A still graphics to video generator using gdk-pixbuf Constructor Argument @@ -205,10 +358,23 @@ Producers a gdk-pixbuf loader. see /usr/lib/gdk-pixbuf/loaders definitely png, jpeg, tiff, pnm, and xpm - If "%" in filename, the filename is used with sprintf - generate a filename from a counter for multi-file/flipbook animation. - The file sequence ends when numeric discontinuity >100. - - If filename contains "/.all.", suffix with an extension to load - all pictures with matching extension from a directory + generate a filename from a counter for multi-file/flipbook + animation. The file sequence ends when numeric + discontinuity >100. + - If filename contains "/.all.", suffix with an extension to + load all pictures with matching extension from a directory. + - If filename contains the string ""). + + Details + + Pixbuf has builtin scaling. It will rescale the originally rendered + title to whatever the consumer requests. Therefore, it will lose + its aspect ratio if so requested, and it is up to the consumer to + request a proper width and height that maintains the image aspect. Initialisation Properties @@ -217,27 +383,24 @@ Producers Mutable Properties - int video_standard - enum mlt_video_standard from mlt_frame.h - PAL = 0, NTSC = 1 - this determines proper pixel aspect ratio - double ttl - how long (seconds) to repeat each picture in file sequences - int x - the horizontal offset from the left edge of the frame - int y - the vertical offset from the top edge of the frame - double mix - the opacity factor to apply to the second frame - (used in addition to alpha channel). - + int ttl - how long (in frames) to repeat each picture in file + sequences. default is 25. Read Only Properties - string resource - file location + string resource - file location. See Constructor Argument above. + int real_width - the original, unscaled width of the rendered title. + int real_height - the original, unscaled height of the title. + int width - the last requested scaled image width. + int height - the last requested scaled image height. Dependencies - libgdk_pixbuf-2.0, libglib-2.0, libgobject-2.0, libgmodule-2.0 + libgdk_pixbuf-2.0, libglib-2.0, libgobject-2.0, libgmodule-2.0 Known Bugs - in/out settings are incorrectly handled. + XXX: in/out settings are incorrectly handled. ppm @@ -266,43 +429,144 @@ Producers Since it uses pipes, it is not compatible with bluefish. + westley + + Description + + Construct a service network from an XML description. + See docs/westley.txt. + + Constructor Argument + + file - an XML text file containing westley XML (schema pending) + + Read Only Properties + + string resource - file location + + Dependencies + + libxml2 + + Known Bugs + + Non-referenced producers and playlists are not destroyed until the + network is destroyed. + A referenced producer or playlist must appear before the reference. + A filter that occurs before a producer has been defined causes a + segfault. + + vorbis + + Description + + OGG Vorbis file reader. + + Constructor Argument + + 'file' - file to use (only .ogg supported at the moment) + + Initialisation Properties + + int in - in point + int out - out point + + Read Only Properties + + double fps - this is fixed at 25 for PAL currently + + Dependencies + + libvorbisfile + + Known Bugs + + Fixed frame size (PAL audio chunks). + Doesn't cover ogg files with multiple, differing sections. Filters ------- + brightness + + Description + + Shift the luma component using a constant value. + + Constructor Argument + + start - the constant floating point numeric value to apply. + - the default is 0. + + Initialisation Properties + + int in - in point + int out - out point + double start - see Constructor Argument above. + double end - the ending adjustment value. the filter interpolates + between the start and end adjustments over the + duration of the effect. + + Read Only Properties + + none + + Dependencies + + none + + Known Bugs + + Does not go completely to black or white. + + deinterlace Description - Deinterlace a frame consisting of two fields by linearly blending. + Deinterlace a frame consisting of two fields using bob, weave, + greedy, one-field, and linear blend methods. This code is + appropriated from the Xine XV video output plugin. Constructor Argument - none + method - a string containing the deinterlace method: bob, weave, + greedy, onefield, or linearblend. The default is + linearblend. Initialisation Properties int in - in point int out - out point - + Read Only Properties none + Mutable Properties + + string method + + Details + + If the frame properties "progressive" or "consumer_progressive" + are non-zero, then the filter is not applied. Also, if applied, + this sets the frame property "progressive" to 1. + Dependencies none Known Bugs - Not a bug, but it only provides fair quality at a fair performance; - i.e., it excels at neither. + Not a bug, but it only provides fair quality. + ffmpeg_dub Description - Use ffmpeg executable to substitute audio stream. + Use ffmpeg executable to substitute audio stream. Constructor Argument @@ -326,6 +590,7 @@ Filters Known Bugs Uses pipes and is therefore not compatible with bluefish. + gamma @@ -335,7 +600,7 @@ Filters Constructor Argument - gamma - a floating point value + gamma - a floating point value. The default is 1.0, or none. Initialisation Properties @@ -353,12 +618,13 @@ Filters Known Bugs none + greyscale Description - Convert color image to greyscale + Convert colour image to greyscale Constructor Argument @@ -381,11 +647,195 @@ Filters none + luma + + Description + + Applies a luma transition between the current and next frames. + Useful for transitions from a slideshow created using producer + pixbuf. + + Constructor Argument + + file - a luma wipe + + Initialisation Properties + + int in - in point + int out - out point + + Read Only Properties + + none + + Mutable Properties + + int period - how long to wait between success iterations of the + transition. For best results set this to a multiple + of ttl used in pixbuf. The default is 24. + + luma. - all properties beginning with "luma." are passed to the + encapsulated luma transition. For example, luma.out controls + the duration of the wipe. + + Dependencies + + transition_luma and its dependencies + + Known Bugs + + none + + + obscure + + Description + + Obscuring filter. + + Constructor Argument + + none + + Initialisation Properties + + string start - in the format X,Y:WxH[:PWxPY] + - PWxPY is the size of the averaging region in pixels. + string end - in the format X,Y:WxH[:PWxPY] + int in - in point + int out - out point + + Read Only Properties + + none + + Dependencies + + none + + Known Bugs + + none + + region + + Description + + Apply one or filters to a region of the video image. The region + can be shaped as well using the alpha channel of another producer. + + Constructor Argument + + file - A file whose alpha channel will "shape" the region. + - The string "circle" is a shortcut but it requires pixbuf with + the librsvg loader. The circle is automatically stretched + to the region to create an ellipse. + + Initialisation Properties + + int in - in point + int out - out point + plus and region transition properties + + Read Only Properties + + see the region transition + + Dependencies + + transition_region + + Known Bugs + + "circle" is unpredictable in the absence of the librsvg pixbuf loader. + + + resample + + Description + + Adjust an audio stream's sampling rate. + This filter is automatically invoked by Fezzik for the sake of + normalisation over inputs and with the consumer. + + Constructor Argument + + frequency - a numeric value for the new sample rate + + Initialisation Properties + + int in - in point + int out - out point + + Mutable Properties + + int frequency - the target sample rate + + Dependencies + + libresample + + Known Bugs + + none + + rescale + + Description + + Scale the producer video frame size to match the consumer. + This filter is automatically invoked by Fezzik in order to normalise + sample aspect ratio. + + Constructor Argument + + interpolation - the rescaling method, one of: + nearest (lowest quality, fastest), + tiles, + bilinear (default; good quality, moderate speed), + hyper (best quality, slowest). + + Initialisation Properties + + int in - in point + int out - out point + + Mutable Properties + + string interpolation - see constructor argument above + + If a property "consumer_aspect_ratio" exists on the frame, then + rescaler normalises the producer's aspect ratio and maximises the + size of the frame, but may not produce the consumer's requested + dimension. Therefore, this option works best in conjunction with the + resize filter. This behavior can be disabled by another service by + either removing the property, setting it to zero, or setting + frame property "distort" to 1. + + Dependencies + + libgdk_pixbuf-2.0, libglib-2.0, libgobject-2.0, libgmodule-2.0 + + Known Bugs + + none + resize Description - Image scaling and padding + Image scaling and padding and field order adjustment. + + Details + + Normally resize is used to pad the producer's + output to what the consumer has requested after an upstream rescale + filter first scales the image to maximise usage of the image area. + This filter also adjusts the field order to lower field first + if the frame property "top_field_first" has been set to 1. + Therefore, when done, it sets the top_field_first to 0. + This filter is automatically invoked by Fezzik as part of image + sample aspect ratio normalisation. Constructor Argument @@ -407,7 +857,7 @@ Filters Known Bugs - none + Assumes lower field first output. volume @@ -417,16 +867,45 @@ Filters Constructor Argument - volume - a floating point value of the factor + gain - a string containing one of: + - a floating point value of the gain adjustment + - a numeric value with the suffix "dB" to adjust in terms of decibels + - "normalise" to normalise the volume to the target amplitude -12dBFS Initialisation Properties int in - in point int out - out point + int window - the number of video frames over which to smooth normalisation. + defaults to 75. Mutable Properties - double volume - the factor applied to each sample + string gain - same as constructor argument above + + string normalise - normalise the volume to the amplitude: + - a numeric value with the suffix "dB" to set amplitude in decibels + - a floating point value of the relative volume + - an unspecified value uses the default -12dBFS + + string limiter - limit all samples above: + - a numeric value with the suffix "dB" + - a floating point value ( dB = 20 * log10(x) ) + - an unspecified value uses the default -6dBFS + + double max_gain - a floating point or decibel value of the maximum gain that + can be applied during normalisation. + - an unspecified value uses the default 20dB + + string end - a gain value just like the gain property above. + This causes the gain to be interpolated from 'gain' to 'end' + over the duration. + + int window - the size of the normalising smoothing buffer in video frame units. + - the smoothing buffer prevents erratic gain changes. + - the default value is 75 video frames. + + gain can be applied as a factor to the normalise amplitude! Dependencies @@ -436,28 +915,32 @@ Filters none - resample + watermark Description - Adjust an audio stream's sampling rate + Add a watermark to the frames. Constructor Argument - frequency - a numeric value for the new sample rate + resource - the producer to use (ie: a .png) Initialisation Properties + string resource - the producer to use + string factory - producer required for the resource ('fezzik') + string geometry - composite geometry + string distort - control scaling int in - in point int out - out point Mutable Properties - int frequency - the target sample rate + none Dependencies - libresample + mlt core modules and optionally, fezzik Known Bugs @@ -470,63 +953,112 @@ Transitions Description - An alpha-channel based compositor for two frames. + A key-framable alpha-channel compositor for two frames. + + Details + + Performs dissolves and luma wipes in addition to alpha compositing. + + By default, the aspect ratio of the B frame is respected and the + size portion of the geometry specification simply defines a + bounding rectangle. + + This performs field-based rendering unless the A frame property + "progressive" or "consumer_progressive" or the transition property + "progressive" is set to 1. Constructor Argument - mix - see below + string start - a geometry specification as X,Y:WxH[!][:mix] + - X, Y, W, H are assumed to pixel units unless they + have the suffix '%' + - '!' is a shortcut to specify distort, see below. + - mix is always a 2 digit percentage, defaults to 100. + - default is "85%,5%:10%x10%" Initialisation Properties + string end - the ending size and position. + string key[F] - X,Y:WxH[:mix] - set a key frame for geometry between + the in and out. F is a frame number and can be + negative to make it relative to the out point. int in - in point int out - out point - - Mutable Properties - - int x - the horizontal offset from the left edge of the frame - int y - the vertical offset from the top edge of the frame - double mix - the opacity factor to apply to the second frame - (used in addition to alpha channel). - - any negative value causes an automatic dissolve - + string factory - The name of a factory service used as a non-PGM + producer loader. The default is fezzik. + Read Only Properties none - + + Mutable Properties + + int progressive - set to 1 to disable field-based rendering. + string distort - when set, causes the B frame image to fill the WxH + completely with no regard to B's aspect ratio. + string halign - when not distorting, set the horizontal alignment + of B within the geometry rectangle. + - one of: left (0), centre (1), or right (2). + - the default is left. + string valign - when not distorting, set the vertical alignment of + B within the geometry rectangle. + - one of: top (0), middle (1), or bottom (2). + - the default is top. + string luma - the luma map file name. If not supplied, a dissolve. + double softness - only when using a luma map, how soft to make the + edges between A and B. 0.0 = no softness. 1.0 = + too soft. + Any property starting with "luma." is passed to the non-PGM luma + producer. + Dependencies none Known Bugs - Need to add field-based rendering. + Assumes lower field first during field rendering. luma Description - A generic dissolve and wipe transition processor. It gets its name + A generic dissolve and wipe transition processor. + + Details + + luma gets its name from how it uses a grayscale "map" file. As the luma value varies over time, a threshold filter is applied to the map to determine - what parts of frame A vs. frame B to show. It only reads PGM - files, but it does handle 16 bit PGM. This performs field-based - rendering. + what parts of frame A vs. frame B to show. It reads PGM files + up to 16 bits! Alternatively, it can use the first frame from any + producer that outputs yuv, but it will be limited to the luma + gamut of 220 values. + This performs field-based rendering unless the A frame property + "progressive" or "consumer_progressive" or the transition property + "progressive" is set to 1. Constructor Argument - string file - the luma map file name. If not supplied, a dissolve. + string resource - the luma map file name - either PGM or any other + producable video. + - If not supplied, a dissolve. Initialisation Properties int in - in point int out - out point + string factory - The name of a factory service used as a non-PGM + producer loader. The default is Fezzik. Mutable Properties - string filename - same as above + string resource - same as above double softness - only when using a luma map, how soft to make the edges between A and B. 0.0 = no softness. 1.0 = too soft. + Any property starting with "producer." is passed to the non-PGM luma + producer. Read Only Properties @@ -537,9 +1069,8 @@ Transitions none Known Bugs - - The luma map must be the same size as the B frame. - The PGM parser does not handle comments. + + Assumes lower field first output. mix @@ -549,7 +1080,7 @@ Transitions Constructor Argument - mix - see below + start - see below Initalisation Properties @@ -558,8 +1089,11 @@ Transitions Mutable Properties - double mix - the mix level to apply to the second frame. - - any negative value causes an automatic crossfade. + double start - the mix level to apply to the second frame. + - any negative value causes an automatic crossfade from 0 to 1. + double end - the ending value of the mix level. mix level will be interpolated + from start to end over the in-out range. + int reverse - set to 1 to reverse the direction of the mix. Read Only Properties @@ -572,11 +1106,48 @@ Transitions Known Bugs Samples from the longer of the two frames are discarded. + + + region + + Description + + Apply zero or more filters to B frame as it is composited onto + a region of the A frame. The "shape" of the region can be defined + by the alpha channel of a third producer. + + Constructor Argument + + resource - a shape producer + + Initialisation Properties + + string resource - nothing is rectangle, "circle" is a pixbuf- + generated SVG circle, anything else is loaded by the factory. + string factory - the service that creates the shape producer. + - the default is fezzik. + string filter[N] - one or more filters to apply. All filter + properties are passed using the same filter "key" + Any property starting with "composite." is passed to the + encapsulated composite transition. + + Read Only Properties + + none + + Dependencies + + transition_composite + + Known Bugs + + none + Consumers --------- - bluefish + bluefish (Proprietary) Description @@ -607,15 +1178,6 @@ Consumers Needs an argument or property for multi-card address. - ffmpeg - - Description - Constructor Argument - Initialisation Properties - Read Only Properties - Dependencies - Known Bugs - libdv Description @@ -624,12 +1186,29 @@ Consumers Constructor Argument - string video_standard - "PAL" (default) or "NTSC" + string target - the filename to write to, e.g. /dev/dv1394. Initialisation Properties + + int buffer - the number of frames to buffer, minimum 1, default 25. + string rescale - a rescale method, see the Filters/rescale. + + Mutable Properties + + int progressive - indicates whether to use progressive or field- + based rendering, default 0 (off). + Read Only Properties + + none + Dependencies + + libdv + Known Bugs + + none sdl @@ -641,6 +1220,12 @@ Consumers string video_standard - "PAL" (default), "NTSC", or "WxH" + Initialisation Properties + + int buffer - the number of frames to buffer, minimum 1, default 25. + string rescale - a rescale method, see the Filters/rescale. + - Hint: "none" works very good with SDL output. + Mutable Properties double volume - audio level factor @@ -648,6 +1233,8 @@ Consumers int audio_off - if 1, disable audio output int scale_overlay - if 1, resample video from source pixel aspect ratio to square pixels. + int progressive - indicates whether to use progressive or field- + based rendering, default 0 (off). Read Only Properties @@ -659,6 +1246,30 @@ Consumers Known Bugs - NTSC handling needs tightening up - sdl:NTSC is the only valid - constructor for NTSC playback at the moment. + none + + westley + + Description + + Serialise the service network to XML. + See docs/westley.txt for more information. + + Constructor Argument + + resource - the name of a file in which to store the XML. + - stdout is default. + + Initialisation Properties + + string resource - same as above. + + Dependencies + + libxml2 + + Known Bugs + Untested arbitrary nesting of multitracks and playlists. + Property "id" is generated as service type followed by number if + no property named "id" exists, but it fails to guarantee uniqueness.