Producers
---------
+ avformat
+
+ Description
+
+ ffmpeg libavformat based producer for video and audio.
+
+ Constructor Argument
+
+ 'file' - producer a/v from file
+
+ 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
+
+ double fps - this is fixed at 25 for PAL currently
+ double aspect_ratio - this is determined on the first frame read
+
+ Dependencies
+
+ ffmpeg must be configured as --enable-shared and installed prior
+ to compilation of mlt.
+
+ Oddities
+
+ There seems to be a discrepancy between audio and video pts (time
+ stamps) which causes audio seeking to be unreliable in some cases.
+ If audio playback is broken, try adding discrepancy=3 as a
+ property.
+
+ Not sure of the exact reasons, but am investigating.
+
+ Known Bugs
+
+ Fixed frame rate.
+ Audio sync discrepancy with some content.
+ Not all libavformat supported formats are seekable.
+ ogg is currently broken.
+ mpeg seeking is inaccurate - doesn't seek to i-frames so you may
+ get junk for a few frames.
+
ffmpeg
Description
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
Implementation does not allow fast random access.
+ fezzik
+
+ Description
+
+ A freindly giant that likes to throw rocks
+
+ Constructor Argument
+
+ 'file' - produce a/v from file
+
+ Initialisation Properties
+
+ int in - in point
+ int out - out point
+
+ Read Only Properties
+
+ 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
+
+ all.
+
+ Known Bugs
+
+ None.
+
libdv
Description
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
Since it uses pipes, it is not compatible with bluefish.
+ westley
+
+ Description
+
+ Construct a service network from an XML description.
+
+ 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.
+ A referenced producer or playlist must appear before the reference.
+
+ 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
-------
none
+ obscure
+
+ Description
+
+ Obscuring filter.
+
+ Constructor Argument
+
+ none
+
+ Initialisation Properties
+
+ string start - in the format X,Y:WxH[:PWxPY]
+ 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
+
resize
Description
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
Dependencies
none
+ rescale
+
+ Description
+
+ Scale the producer video frame size to match the consumer.
+
+ Constructor Argument
+
+ interpolation - the rescaling method, one of:
+ nearest (lowest quality, fastest),
+ tiles,
+ bilinear (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
+
+ Dependencies
+
+ libgdk_pixbuf-2.0, libglib-2.0, libgobject-2.0, libgmodule-2.0
+
+ Known Bugs
+
+ none
+
Transitions
-----------
Constructor Argument
- mix - see below
+ string start - X,Y:WxH[:mix]
Initialisation Properties
+ string end - X,Y:WxH[:mix]
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
-
+
Read Only Properties
none
Constructor Argument
- string file - the luma map file name. If not supplied, a dissolve.
+ string resource - the luma map file name. If not supplied, a dissolve.
Initialisation Properties
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.
Known Bugs
The luma map must be the same size as the B frame.
+ The PGM parser does not handle comments.
mix
Dependencies
Known Bugs
+ libdv
+
+ Description
+
+ libdv dv producer.
+
+ Constructor Argument
+
+ string video_standard - "PAL" (default) or "NTSC"
+
+ Initialisation Properties
+ Read Only Properties
+ Dependencies
+ Known Bugs
+
sdl
+
Description
Simple DirectMedia Layer audio and video output module.
NTSC handling needs tightening up - sdl:NTSC is the only valid
constructor for NTSC playback at the moment.
+ westley
+
+ Description
+
+ Serialise the service network to XML.
+
+ Constructor Argument
+
+ resource - the name of a file in which to store the XML.
+ stdout is used if not supplied.
+
+ 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.
+
projects / melted / blobdiff