4 Services marked as "(Proprietary)" are not distributed with the GPL version
14 ffmpeg libavformat based producer for video and audio.
18 'file' - a filename specification or URL in the form:
19 [{protocol}|{format}]:{resource}[?{format-parameter}[&{format-parameter}...]]
20 For example, video4linux:/dev/video1?width:320&height:240
21 Note: on the bash command line, & must be escaped as '\&'.
22 Also, note the use of ':' instead of '=' for parameters.
23 Use 'ffmpeg -formats' to see a list of supported protocols
28 Format parameters only appear to be useful with 'video4linux' or
29 'audio_device' formats. For 'video4linux' the parameters are
30 width, height, frame_rate, frame_rate_base, and standard (ntsc|pal).
31 For 'audio_device' the parameters are channels and sample_rate.
33 Initialisation Properties
35 int video_index - index of video stream to use (-1 is off)
36 int audio_index - index of audio stream to use (-1 is off)
42 string resource - file location
43 double fps - this is fixed at 25 for PAL currently
44 double source_fps - the framerate of the resource
45 double aspect_ratio - sample aspect ratio of the resource
46 - this is determined on every frame read
50 ffmpeg must be configured as --enable-shared and installed prior
51 to compilation of mlt.
55 Audio sync discrepancy with some content.
56 Not all libavformat supported formats are seekable.
57 Ogg Vorbis is currently broken.
58 MPEG seeking is inaccurate - doesn't seek to i-frames so you may
59 get junk for a few frames.
60 RAW DV seeking not supported.
61 Fails to play beyond first frame of video of sources with PTS not
62 starting at 0 (video4linux).
68 A friendly giant that likes to rhyme and throw rocks
72 'file' - a filename specification:
73 [{mlt-service}:]{resource} | {mlt-service}
74 - can also be the name of a producer service that can
75 accept the resource specified post construction.
77 Initialisation Properties
81 + all producer initialising properties
85 string resource - file location
86 + all producer read only properties
90 This producer is has two roles:
92 1. it handles the mappings of all file names to the other
94 2. it attaches normalising filters (rescale, resize and resample)
95 to the producers (when necessary).
97 This producer simplifies many aspects of use. Essentially, it
98 ensures that a consumer will receive images and audio precisely as
114 A simple colour generator.
118 colour - A colour value is a hexadecimal representation of RGB plus
119 alpha channel as 0xrrggbbaa.
120 - Also colours can be the words: white, black, red, green,
122 - The default colour is black.
124 Initialisation Properties
145 Test case pipe based producer for video and audio.
149 'file' - produce a/v from file
150 v4l - produce a/v from video4linux and dsp device
152 Initialisation Properties
154 string video_type - "file" or "v4l"
155 string video_file - file or v4l device
156 string video_size - WxH of video to produce (default: "")
157 int video_loop - loop video until audio exhausted (default: 0)
158 string audio_type - "file" or "dsp"
159 string audio_file - file or dsp device
160 int audio_rate - audio frequency (default: 48000)
161 int audio_channels - audio channels (default: 2)
162 int audio_track - audio track to use (default: 0)
163 int audio_loop - loop audio until video exhausted (default: 0)
166 double fps - output frames per second (default: 25)
167 double aspect_ratio - aspect ratio of video
171 string resource - file or "v4l"
172 int end_of_clip - holds 1 when input is exhausted
180 in point setting is broken.
182 Implementation does not allow fast random access.
188 libdv based decoder for video and audio.
192 'file' - produce a/v from file
194 Initialisation Properties
201 string resource - file location
202 double fps - output frames per second
203 int length - duration of resource (in frames)
207 string quality - one of "best," "fast" or anything else chooses
216 DVCPRO is incorrectly identified as 16:9 aspect ratio. You must use
217 libdv from CVS or a post 0.101 release.
223 MainConcept based dv decoder for video and audio.
227 'file' - produce a/v from file
229 Initialisation Properties
236 string resource - file location
237 double fps - output frames per second
238 int length - duration of resource (in frames)
242 MainConcept DV or DVCPRO SDK, libdv.
243 "dv_sdk" installed parallel to mlt.
253 MainConcept based mpeg decoder for video and audio.
257 'file' - produce a/v from file
259 Initialisation Properties
266 string resource - file location
267 double fps - output frames per second
268 double aspect_ratio - sample aspect ratio of video
269 int length - duration of resource (in frames)
273 MainConcept MPEG SDK.
274 "mpeg_sdk_release" installed parallel to mlt.
284 A title generator that uses the Pango international text layout
285 and Freetype2 font renderer.
289 string file - a text file containing Pango markup, see:
290 http://developer.gnome.org/doc/API/2.0/pango/PangoMarkupFormat.html
291 - requires xml-like encoding special chars from:
292 <, >, & -to- <, >, &
296 Supplying a filename with extension ".txt" causes the Fezzik
297 producer to load with pango. If the filename begins with "+" the
298 pango producer interprets the filename as pango text. This is a
299 shortcut to embed titles in inigo commands. For westley, it is
300 recommended that you embed the title text in the property value.
301 If you need to embed Pango markup in a westley XML file, then
302 enclose the value inside "<![CDATA[ ... ]]>".
304 Pango has builtin scaling. It will rescale the originally rendered
305 title to whatever the consumer requests. Therefore, it will lose
306 its aspect ratio if so requested, and it is up to the consumer to
307 request a proper width and height that maintains the image aspect.
309 Initialisation Properties
316 string markup - a UTF-8 string containing Pango markup see:
317 http://developer.gnome.org/doc/API/2.0/pango/PangoMarkupFormat.html
318 - requires xml-like encoding special chars from:
319 <, >, & -to- <, >, &
320 string fgcolour - an RGBA colour specification of the text
322 string bgcolour - an RGBA colour of the background rectangle
323 string align - paragraph alignment: left, centre, right
324 - also, numbers 0, 1 and 2 can be used respectively.
325 int pad - the number of pixels to pad the background rectangle
326 beyond edges of text. default 0.
327 string markup - see constructor argument
328 string text - non-markup string in UTF-8 encoding (can contain
329 markup chars un-encoded)
330 string font - the default typeface to use when not using markup.
331 default "Sans 48". FreeType2 renders at 72 dpi.
335 string resource - the text/markup file or "pango" if no file.
336 int real_width - the original, unscaled width of the rendered title.
337 int real_height - the original, unscaled height of the title.
338 int width - the last requested scaled image width.
339 int height - the last requested scaled image height.
343 libpango-1.0, libpangoft2-1.0, libfreetype, libgdk_pixbuf-2.0,
344 libglib-2.0, libgobject-2.0, libgmodule-2.0, libfontconfig.
348 The foreground and background Pango markup span attributes are not
350 Word wrapping is not supported.
356 A still graphics to video generator using gdk-pixbuf
360 'file' - The name of a graphics file loadable by
361 a gdk-pixbuf loader. see /usr/lib/gdk-pixbuf/loaders
362 definitely png, jpeg, tiff, pnm, and xpm
363 - If "%" in filename, the filename is used with sprintf
364 generate a filename from a counter for multi-file/flipbook
365 animation. The file sequence ends when numeric
367 - If filename contains "/.all.", suffix with an extension to
368 load all pictures with matching extension from a directory.
369 - If filename contains the string "<svg", then pixbuf tries
370 to load the filename as inline SVG XML, which is convenient
371 for inigo commands. For westley XML, set the resource
372 property value with inline XML embedded using a CDATA node
373 ("<![CDATA[ ... ]]>").
377 Pixbuf has builtin scaling. It will rescale the originally rendered
378 title to whatever the consumer requests. Therefore, it will lose
379 its aspect ratio if so requested, and it is up to the consumer to
380 request a proper width and height that maintains the image aspect.
382 Initialisation Properties
389 int ttl - how long (in frames) to repeat each picture in file
390 sequences. default is 25.
394 string resource - file location. See Constructor Argument above.
395 int real_width - the original, unscaled width of the rendered title.
396 int real_height - the original, unscaled height of the title.
397 int width - the last requested scaled image width.
398 int height - the last requested scaled image height.
402 libgdk_pixbuf-2.0, libglib-2.0, libgobject-2.0, libgmodule-2.0
406 XXX: in/out settings are incorrectly handled.
412 Reads a stream of contiguous PPM images.
416 command - a shell command to run something that produces ppm
419 Initialisation Properties
425 string resource - the command
433 Since it uses pipes, it is not compatible with bluefish.
439 Construct a service network from an XML description.
440 See docs/westley.txt.
444 file - an XML text file containing westley XML (schema pending)
448 string resource - file location
456 Non-referenced producers and playlists are not destroyed until the
457 network is destroyed.
458 A referenced producer or playlist must appear before the reference.
459 A filter that occurs before a producer has been defined causes a
466 OGG Vorbis file reader.
470 'file' - file to use (only .ogg supported at the moment)
472 Initialisation Properties
479 double fps - this is fixed at 25 for PAL currently
487 Fixed frame size (PAL audio chunks).
488 Doesn't cover ogg files with multiple, differing sections.
497 Shift the luma component using a constant value.
501 start - the constant floating point numeric value to apply.
504 Initialisation Properties
508 double start - see Constructor Argument above.
509 double end - the ending adjustment value. the filter interpolates
510 between the start and end adjustments over the
511 duration of the effect.
523 Does not go completely to black or white.
530 Copy audio from one channel to another channel.
534 to - the 0-indexed channel to copy into, default is 1.
539 int from - the channel from which to copy, default is 0.
555 Deinterlace a frame consisting of two fields using bob, weave,
556 greedy, one-field, and linear blend methods. This code is
557 appropriated from the Xine XV video output plugin.
561 method - a string containing the deinterlace method: bob, weave,
562 greedy, onefield, or linearblend. The default is
565 Initialisation Properties
580 If the frame properties "progressive" or "consumer_progressive"
581 are non-zero, then the filter is not applied. Also, if applied,
582 this sets the frame property "progressive" to 1.
590 Not a bug, but it only provides fair quality.
597 Use ffmpeg executable to substitute audio stream.
601 file - filename of a WAV, Ogg Vorbis (--enable-vorbis),
602 MP3 (--enable-mp3lame), or AC-3 (--enable-a52) audio file.
604 Initialisation Properties
611 string resource - file
615 ffmpeg plus for ffmpeg:
616 libogg and libvorbis for Ogg Vorbis, libmp3lame for MP3, liba52 for AC-3.
620 Uses pipes and is therefore not compatible with bluefish.
627 Adjust image luma using a non-linear power-law curve
631 gamma - a floating point value. The default is 1.0, or none.
633 Initialisation Properties
640 double gamma - the exponential factor of the power-law curve
655 Convert colour image to greyscale
661 Initialisation Properties
682 Applies a luma transition between the current and next frames.
683 Useful for transitions from a slideshow created using producer
690 Initialisation Properties
701 int period - how long to wait between success iterations of the
702 transition. For best results set this to a multiple
703 of ttl used in pixbuf. The default is 24.
705 luma. - all properties beginning with "luma." are passed to the
706 encapsulated luma transition. For example, luma.out controls
707 the duration of the wipe.
711 transition_luma and its dependencies
728 Initialisation Properties
730 string start - in the format X,Y:WxH[:PWxPY]
731 - PWxPY is the size of the averaging region in pixels.
732 string end - in the format X,Y:WxH[:PWxPY]
752 Apply one or filters to a region of the video image. The region
753 can be shaped as well using the alpha channel of another producer.
757 file - A file whose alpha channel will "shape" the region.
758 - The string "circle" is a shortcut but it requires pixbuf with
759 the librsvg loader. The circle is automatically stretched
760 to the region to create an ellipse.
762 Initialisation Properties
766 plus and region transition properties
770 see the region transition
778 "circle" is unpredictable in the absence of the librsvg pixbuf loader.
785 Adjust an audio stream's sampling rate, and duplicate channels if
786 producer provides less than consumer requested.
788 This filter is automatically invoked by Fezzik for the sake of
789 normalisation over inputs and with the consumer.
793 frequency - a numeric value for the new sample rate
795 Initialisation Properties
802 int frequency - the target sample rate
810 Assumes 2 channels during libsamplerate initialisation. Untested
817 Scale the producer video frame size to match the consumer.
818 This filter is automatically invoked by Fezzik in order to normalise
823 interpolation - the rescaling method, one of:
824 nearest (lowest quality, fastest),
826 bilinear (default; good quality, moderate speed),
827 hyper (best quality, slowest).
829 Initialisation Properties
836 string interpolation - see constructor argument above
838 If a property "consumer_aspect_ratio" exists on the frame, then
839 rescaler normalises the producer's aspect ratio and maximises the
840 size of the frame, but may not produce the consumer's requested
841 dimension. Therefore, this option works best in conjunction with the
842 resize filter. This behavior can be disabled by another service by
843 either removing the property, setting it to zero, or setting
844 frame property "distort" to 1.
848 libgdk_pixbuf-2.0, libglib-2.0, libgobject-2.0, libgmodule-2.0
858 Image scaling and padding and field order adjustment.
862 Normally resize is used to pad the producer's
863 output to what the consumer has requested after an upstream rescale
864 filter first scales the image to maximise usage of the image area.
865 This filter also adjusts the field order to lower field first
866 if the frame property "top_field_first" has been set to 1.
867 Therefore, when done, it sets the top_field_first to 0.
868 This filter is automatically invoked by Fezzik as part of image
869 sample aspect ratio normalisation.
873 scale - "affine" to use affine transform scaling, otherwise
876 Initialisation Properties
891 Assumes lower field first output.
897 Adjust an audio stream's volume level
901 gain - a string containing one of:
902 - a floating point value of the gain adjustment
903 - a numeric value with the suffix "dB" to adjust in terms of decibels
904 - "normalise" to normalise the volume to the target amplitude -12dBFS
906 Initialisation Properties
910 int window - the number of video frames over which to smooth normalisation.
915 string gain - same as constructor argument above
917 string normalise - normalise the volume to the amplitude:
918 - a numeric value with the suffix "dB" to set amplitude in decibels
919 - a floating point value of the relative volume
920 - an unspecified value uses the default -12dBFS
922 string limiter - limit all samples above:
923 - a numeric value with the suffix "dB"
924 - a floating point value ( dB = 20 * log10(x) )
925 - an unspecified value uses the default -6dBFS
927 double max_gain - a floating point or decibel value of the maximum gain that
928 can be applied during normalisation.
929 - an unspecified value uses the default 20dB
931 string end - a gain value just like the gain property above.
932 This causes the gain to be interpolated from 'gain' to 'end'
935 int window - the size of the normalising smoothing buffer in video frame units.
936 - the smoothing buffer prevents erratic gain changes.
937 - the default value is 75 video frames.
939 gain can be applied as a factor to the normalise amplitude!
953 Add a watermark to the frames.
957 resource - the producer to use (ie: a .png)
959 Initialisation Properties
961 string resource - the producer to use
962 string factory - producer required for the resource ('fezzik')
963 string geometry - composite geometry
964 string distort - control scaling
974 mlt core modules and optionally, fezzik
987 A key-framable alpha-channel compositor for two frames.
991 Performs dissolves and luma wipes in addition to alpha compositing.
993 By default, the aspect ratio of the B frame is respected and the
994 size portion of the geometry specification simply defines a
997 This performs field-based rendering unless the A frame property
998 "progressive" or "consumer_progressive" or the transition property
999 "progressive" is set to 1.
1001 Constructor Argument
1003 string start - a geometry specification as X,Y:WxH[!][:mix]
1004 - X, Y, W, H are assumed to pixel units unless they
1006 - '!' is a shortcut to specify distort, see below.
1007 - mix is always a 2 digit percentage, defaults to 100.
1008 - default is "85%,5%:10%x10%"
1010 Initialisation Properties
1012 string end - the ending size and position.
1013 string key[F] - X,Y:WxH[:mix] - set a key frame for geometry between
1014 the in and out. F is a frame number and can be
1015 negative to make it relative to the out point.
1018 string factory - The name of a factory service used as a non-PGM
1019 producer loader. The default is fezzik.
1021 Read Only Properties
1027 int progressive - set to 1 to disable field-based rendering.
1028 string distort - when set, causes the B frame image to fill the WxH
1029 completely with no regard to B's aspect ratio.
1030 string halign - when not distorting, set the horizontal alignment
1031 of B within the geometry rectangle.
1032 - one of: left (0), centre (1), or right (2).
1033 - the default is left.
1034 string valign - when not distorting, set the vertical alignment of
1035 B within the geometry rectangle.
1036 - one of: top (0), middle (1), or bottom (2).
1037 - the default is top.
1038 string luma - the luma map file name. If not supplied, a dissolve.
1039 double softness - only when using a luma map, how soft to make the
1040 edges between A and B. 0.0 = no softness. 1.0 =
1042 Any property starting with "luma." is passed to the non-PGM luma
1051 Assumes lower field first during field rendering.
1057 A generic dissolve and wipe transition processor.
1062 from how it uses a grayscale "map" file. As the luma value varies
1063 over time, a threshold filter is applied to the map to determine
1064 what parts of frame A vs. frame B to show. It reads PGM files
1065 up to 16 bits! Alternatively, it can use the first frame from any
1066 producer that outputs yuv, but it will be limited to the luma
1067 gamut of 220 values.
1068 This performs field-based rendering unless the A frame property
1069 "progressive" or "consumer_progressive" or the transition property
1070 "progressive" is set to 1.
1072 Constructor Argument
1074 string resource - the luma map file name - either PGM or any other
1076 - If not supplied, a dissolve.
1078 Initialisation Properties
1082 string factory - The name of a factory service used as a non-PGM
1083 producer loader. The default is Fezzik.
1087 string resource - same as above
1088 double softness - only when using a luma map, how soft to make the
1089 edges between A and B. 0.0 = no softness. 1.0 =
1091 Any property starting with "producer." is passed to the non-PGM luma
1094 Read Only Properties
1104 Assumes lower field first output.
1110 An two stream audio mixer.
1112 Constructor Argument
1116 Initalisation Properties
1123 double start - the mix level to apply to the second frame.
1124 - any negative value causes an automatic crossfade from 0 to 1.
1125 double end - the ending value of the mix level. mix level will be interpolated
1126 from start to end over the in-out range.
1127 int reverse - set to 1 to reverse the direction of the mix.
1129 Read Only Properties
1139 Samples from the longer of the two frames are discarded.
1146 Apply zero or more filters to B frame as it is composited onto
1147 a region of the A frame. The "shape" of the region can be defined
1148 by the alpha channel of a third producer.
1150 Constructor Argument
1152 resource - a shape producer
1154 Initialisation Properties
1156 string resource - nothing is rectangle, "circle" is a pixbuf-
1157 generated SVG circle, anything else is loaded by the factory.
1158 string factory - the service that creates the shape producer.
1159 - the default is fezzik.
1160 string filter[N] - one or more filters to apply. All filter
1161 properties are passed using the same filter "key"
1162 Any property starting with "composite." is passed to the
1163 encapsulated composite transition.
1165 Read Only Properties
1171 transition_composite
1181 bluefish (Proprietary)
1185 BlueFish444 audio and video output module.
1187 Constructor Argument
1189 string video_standard - "PAL" (default) or "NTSC"
1191 Initialisation Properties
1193 int video_standard - 0 = PAL, 1 = NTSC
1195 Read Only Properties
1201 BlueVelvet SDK installed parallel to mlt in "bluefish."
1205 Does not work with any service that uses pipes!
1207 If mlt crashes, you must reload the BlueDriver kernel module
1208 due to unreleased DMA buffers.
1210 Needs an argument or property for multi-card address.
1218 Constructor Argument
1220 string target - the filename to write to, e.g. /dev/dv1394.
1222 Initialisation Properties
1224 int buffer - the number of frames to buffer, minimum 1, default 25.
1225 string rescale - a rescale method, see the Filters/rescale.
1229 int progressive - indicates whether to use progressive or field-
1230 based rendering, default 0 (off).
1232 Read Only Properties
1248 Simple DirectMedia Layer audio and video output module.
1250 Constructor Argument
1252 string video_standard - "PAL" (default), "NTSC", or "WxH"
1254 Initialisation Properties
1256 int buffer - the number of frames to buffer, minimum 1, default 25.
1257 string rescale - a rescale method, see the Filters/rescale.
1258 - Hint: "none" works very good with SDL output.
1262 double volume - audio level factor
1263 int video_off - if 1, disable video output
1264 int audio_off - if 1, disable audio output
1265 int scale_overlay - if 1, resample video from source pixel aspect
1266 ratio to square pixels.
1267 int progressive - indicates whether to use progressive or field-
1268 based rendering, default 0 (off).
1270 Read Only Properties
1276 libSDL-1.2, libasound, libaudio, libXt, libX11, libXext, libSM, libICE
1286 Serialise the service network to XML.
1287 See docs/westley.txt for more information.
1289 Constructor Argument
1291 resource - the name of a file in which to store the XML.
1292 - stdout is default.
1294 Initialisation Properties
1296 string resource - same as above.
1304 Untested arbitrary nesting of multitracks and playlists.
1305 Property "id" is generated as service type followed by number if
1306 no property named "id" exists, but it fails to guarantee uniqueness.