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docs: updates
MIME-type -> Media type Fix some old gst-inspect output
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8 changed files with 143 additions and 80 deletions
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@ -194,75 +194,137 @@ gst-inspect mad
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<screen>
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Factory Details:
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Long name: Audio Sink (OSS)
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Class: Sink/Audio
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Description: Output to a sound card via OSS
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Version: 0.3.3.1
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Author(s): Erik Walthinsen <omega@cse.ogi.edu>, Wim Taymans <wim.taymans@chello.be>
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Copyright: (C) 1999
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Rank: secondary (128)
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Long-name: Audio Sink (OSS)
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Klass: Sink/Audio
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Description: Output to a sound card via OSS
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Author: Erik Walthinsen <omega@cse.ogi.edu>, Wim Taymans <wim.taymans@chello.be>
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Plugin Details:
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Name: ossaudio
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Description: OSS (Open Sound System) support for GStreamer
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Filename: /home/wim/gst/head/gst-plugins-good/sys/oss/.libs/libgstossaudio.so
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Version: 1.0.0.1
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License: LGPL
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Source module: gst-plugins-good
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Source release date: 2012-09-25 12:52 (UTC)
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Binary package: GStreamer Good Plug-ins git
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Origin URL: Unknown package origin
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GObject
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+----GstObject
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+----GstElement
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+----GstOssSink
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+----GInitiallyUnowned
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+----GstObject
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+----GstElement
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+----GstBaseSink
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+----GstAudioBaseSink
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+----GstAudioSink
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+----GstOssSink
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Pad Templates:
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SINK template: 'sink'
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Availability: Always
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Capabilities:
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'osssink_sink':
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MIME type: 'audio/raw':
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format: String: int
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endianness: Integer: 1234
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width: List:
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Integer: 8
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Integer: 16
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depth: List:
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Integer: 8
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Integer: 16
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channels: Integer range: 1 - 2
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law: Integer: 0
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signed: List:
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Boolean: FALSE
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Boolean: TRUE
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rate: Integer range: 1000 - 48000
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audio/x-raw
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format: { S16LE, U16LE, S8, U8 }
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layout: interleaved
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rate: [ 1, 2147483647 ]
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channels: 1
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audio/x-raw
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format: { S16LE, U16LE, S8, U8 }
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layout: interleaved
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rate: [ 1, 2147483647 ]
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channels: 2
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channel-mask: 0x0000000000000003
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Element Flags:
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GST_ELEMENT_THREADSUGGESTED
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no flags set
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Element Implementation:
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No loopfunc(), must be chain-based or not configured yet
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Has change_state() function: gst_osssink_change_state
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Has custom save_thyself() function: gst_element_save_thyself
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Has custom restore_thyself() function: gst_element_restore_thyself
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Has change_state() function: gst_audio_base_sink_change_state
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Clocking Interaction:
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element requires a clock
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element provides a clock: GstOssClock
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element is supposed to provide a clock but returned NULL
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Element has no indexing capabilities.
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Element has no URI handling capabilities.
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Pads:
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SINK: 'sink'
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Implementation:
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Has chainfunc(): 0x40056fc0
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Has chainfunc(): gst_base_sink_chain
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Has custom eventfunc(): gst_base_sink_event
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Has custom queryfunc(): gst_base_sink_sink_query
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Has custom iterintlinkfunc(): gst_pad_iterate_internal_links_default
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Pad Template: 'sink'
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Element Arguments:
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name : String (Default "element")
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device : String (Default "/dev/dsp")
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mute : Boolean (Default false)
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format : Integer (Default 16)
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channels : Enum "GstAudiosinkChannels" (default 1)
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(0): Silence
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(1): Mono
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(2): Stereo
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frequency : Integer (Default 11025)
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fragment : Integer (Default 6)
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buffer-size : Integer (Default 4096)
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Element Signals:
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"handoff" : void user_function (GstOssSink* object,
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gpointer user_data);
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Element Properties:
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name : The name of the object
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flags: readable, writable
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String. Default: "osssink0"
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parent : The parent of the object
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flags: readable, writable
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Object of type "GstObject"
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sync : Sync on the clock
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flags: readable, writable
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Boolean. Default: true
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max-lateness : Maximum number of nanoseconds that a buffer can be late before it is dropped (-1 unlimited)
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flags: readable, writable
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Integer64. Range: -1 - 9223372036854775807 Default: -1
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qos : Generate Quality-of-Service events upstream
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flags: readable, writable
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Boolean. Default: false
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async : Go asynchronously to PAUSED
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flags: readable, writable
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Boolean. Default: true
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ts-offset : Timestamp offset in nanoseconds
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flags: readable, writable
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Integer64. Range: -9223372036854775808 - 9223372036854775807 Default: 0
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enable-last-sample : Enable the last-sample property
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flags: readable, writable
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Boolean. Default: false
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last-sample : The last sample received in the sink
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flags: readable
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Boxed pointer of type "GstSample"
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blocksize : Size in bytes to pull per buffer (0 = default)
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flags: readable, writable
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Unsigned Integer. Range: 0 - 4294967295 Default: 4096
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render-delay : Additional render delay of the sink in nanoseconds
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flags: readable, writable
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Unsigned Integer64. Range: 0 - 18446744073709551615 Default: 0
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throttle-time : The time to keep between rendered buffers
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flags: readable, writable
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Unsigned Integer64. Range: 0 - 18446744073709551615 Default: 0
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buffer-time : Size of audio buffer in microseconds, this is the minimum latency that the sink reports
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flags: readable, writable
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Integer64. Range: 1 - 9223372036854775807 Default: 200000
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latency-time : The minimum amount of data to write in each iteration in microseconds
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flags: readable, writable
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Integer64. Range: 1 - 9223372036854775807 Default: 10000
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provide-clock : Provide a clock to be used as the global pipeline clock
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flags: readable, writable
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Boolean. Default: true
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slave-method : Algorithm to use to match the rate of the masterclock
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flags: readable, writable
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Enum "GstAudioBaseSinkSlaveMethod" Default: 1, "skew"
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(0): resample - GST_AUDIO_BASE_SINK_SLAVE_RESAMPLE
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(1): skew - GST_AUDIO_BASE_SINK_SLAVE_SKEW
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(2): none - GST_AUDIO_BASE_SINK_SLAVE_NONE
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can-activate-pull : Allow pull-based scheduling
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flags: readable, writable
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Boolean. Default: false
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alignment-threshold : Timestamp alignment threshold in nanoseconds
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flags: readable, writable
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Unsigned Integer64. Range: 1 - 18446744073709551614 Default: 40000000
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drift-tolerance : Tolerance for clock drift in microseconds
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flags: readable, writable
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Integer64. Range: 1 - 9223372036854775807 Default: 40000
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discont-wait : Window of time in nanoseconds to wait before creating a discontinuity
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flags: readable, writable
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Unsigned Integer64. Range: 0 - 18446744073709551614 Default: 1000000000
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device : OSS device (usually /dev/dspN)
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flags: readable, writable
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String. Default: "/dev/dsp"
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</screen>
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<para>
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@ -241,10 +241,10 @@ link_to_multiplexer (GstPad *tolink_pad,
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<command>gst-inspect vorbisdec</command>. You will see two pads:
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a source and a sink pad. Both of these pads are always available,
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and both have capabilities attached to them. The sink pad will
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accept vorbis-encoded audio data, with the mime-type
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accept vorbis-encoded audio data, with the media type
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<quote>audio/x-vorbis</quote>. The source pad will be used
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to send raw (decoded) audio samples to the next element, with
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a raw audio mime-type (in this case,
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a raw audio media type (in this case,
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<quote>audio/x-raw</quote>). The source pad will also
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contain properties for the audio samplerate and the amount of
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channels, plus some more that you don't need to worry about
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@ -60,13 +60,14 @@
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<para>
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If you need a new format that has not yet been defined in our <xref
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linkend="section-types-definitions"/>, you will want to have some general
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guidelines on mimetype naming, properties and such. A mimetype would
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ideally be one defined by IANA; else, it should be in the form
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type/x-name, where type is the sort of data this mimetype handles (audio,
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video, ...) and name should be something specific for this specific type.
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Audio and video mimetypes should try to support the general audio/video
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properties (see the list), and can use their own properties, too. To get
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an idea of what properties we think are useful, see (again) the list.
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guidelines on media type naming, properties and such. A media type would
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ideally be equivalent to the Mime-type defined by IANA; else, it should
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be in the form type/x-name, where type is the sort of data this media type
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handles (audio, video, ...) and name should be something specific for
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this specific type. Audio and video media types should try to support the
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general audio/video properties (see the list), and can use their own
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properties, too. To get an idea of what properties we think are useful,
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see (again) the list.
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</para>
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<para>
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Take your time to find the right set of properties for your type. There
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@ -206,7 +207,7 @@ plugin_init (GstPlugin *plugin)
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<thead>
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<row>
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<entry>Mime Type</entry>
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<entry>Media Type</entry>
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<entry>Description</entry>
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<entry>Property</entry>
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<entry>Property Type</entry>
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<thead>
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<row>
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<entry>Mime Type</entry>
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<entry>Media Type</entry>
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<entry>Description</entry>
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<entry>Property</entry>
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<entry>Property Type</entry>
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@ -878,7 +879,7 @@ plugin_init (GstPlugin *plugin)
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<entry>1, 2 or 4</entry>
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<entry>
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Version of the MPEG codec that this stream was encoded with.
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Note that we have different mimetypes for 3ivx, XviD, DivX and
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Note that we have different media types for 3ivx, XviD, DivX and
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"standard" ISO MPEG-4. This is <emphasis>not</emphasis> a good
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thing and we're fully aware of this. However, we do not have a
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solution yet.
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<entry></entry>
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<entry>
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There are currently no specific properties defined or needed for
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this type. Note that we have different mimetypes for VP-3 and
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this type. Note that we have different media types for VP-3 and
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Theora, which is not necessarily a good idea. This could probably
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be improved.
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</entry>
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<thead>
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<row>
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<entry>Mime Type</entry>
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<entry>Media Type</entry>
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<entry>Description</entry>
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<entry>Property</entry>
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<entry>Property Type</entry>
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<thead>
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<row>
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<entry>Mime Type</entry>
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<entry>Media Type</entry>
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<entry>Description</entry>
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<entry>Property</entry>
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<entry>Property Type</entry>
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<thead>
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<row>
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<entry>Mime Type</entry>
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<entry>Media Type</entry>
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<entry>Description</entry>
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<entry>Property</entry>
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<entry>Property Type</entry>
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The last argument in a template is its type
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or list of supported types. In this example, we use 'ANY', which means
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that this element will accept all input. In real-life situations, you
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would set a mimetype and optionally a set of properties to make sure
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would set a media type and optionally a set of properties to make sure
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that only supported input will come in. This representation should be
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a string that starts with a mimetype, then a set of comma-separates
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a string that starts with a media type, then a set of comma-separates
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properties with their supported values. In case of an audio filter that
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supports raw integer 16-bit audio, mono or stereo at any samplerate, the
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correct template would look like this:
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@ -139,15 +139,15 @@ gst_my_filter_setcaps (GstPad *pad,
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{
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GstStructure *structure = gst_caps_get_structure (caps, 0);
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GstMyFilter *filter = GST_MY_FILTER (GST_OBJECT_PARENT (pad));
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const gchar *mime;
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const gchar *media;
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/* Since we're an audio filter, we want to handle raw audio
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* and from that audio type, we need to get the samplerate and
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* number of channels. */
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mime = gst_structure_get_name (structure);
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if (strcmp (mime, "audio/x-raw") != 0) {
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GST_WARNING ("Wrong mimetype %s provided, we only support %s",
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mime, "audio/x-raw");
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media = gst_structure_get_name (structure);
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if (strcmp (media, "audio/x-raw") != 0) {
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GST_WARNING ("Wrong media type %s provided, we only support %s",
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media, "audio/x-raw");
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return FALSE;
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}
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}
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--><!-- example-end caps.func b --></programlisting>
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<para>
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In here, we check the mimetype of the provided caps. Normally, you don't
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In here, we check the media type of the provided caps. Normally, you don't
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need to do that in your own plugin/element, because the core does that
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for you. We simply use it to show how to retrieve the mimetype from a
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for you. We simply use it to show how to retrieve the media type from a
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provided set of caps. Types are stored in <ulink type="http"
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url="../../gstreamer/html/gstreamer-GstStructure.html"><classname>GstStructure
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</classname></ulink> internally. A <ulink
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{
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GstAviMux *mux = GST_AVI_MUX (gst_pad_get_parent (pad));
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GstStructure *str = gst_caps_get_structure (caps, 0);
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const gchar *mime = gst_structure_get_name (str);
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const gchar *media = gst_structure_get_name (str);
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if (!strcmp (str, "audio/mpeg")) {
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/* get version, make sure it's 1, get layer, make sure it's 1-3,
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@ -163,10 +163,10 @@ the left of it to the element right of it.
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.B Caps
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MIMETYPE \fI[, PROPERTY[, PROPERTY ...]]]\fR \fI[; CAPS[; CAPS ...]]\fR
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MEDIATYPE \fI[, PROPERTY[, PROPERTY ...]]]\fR \fI[; CAPS[; CAPS ...]]\fR
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Creates a capability with the given mimetype and optionally with given
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properties. The mimetype can be escaped using " or '.
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Creates a capability with the given media type and optionally with given
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properties. The media type can be escaped using " or '.
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If you want to chain caps, you can add more caps in the same format afterwards.
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.B Properties
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@ -1,13 +1,13 @@
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.TH GStreamer 1 "May 2003"
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.SH "NAME"
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gst\-typefind - print MIME type of file
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gst\-typefind - print Media type of file
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.SH "SYNOPSIS"
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.B gst\-typefind <file>
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.SH "DESCRIPTION"
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.PP
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\fIgst\-typefind\fP uses the GStreamer type finding system to
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determine the relevant GStreamer plugin to parse or decode \fBfile\fP,
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and the corresponding MIME type.
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and the corresponding media type.
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.
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.SH "OPTIONS"
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.l
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