LSMASHSource/LWLibavAudioSource - Revision history

FranceBB: /* Syntax and Parameters */

2026-03-01T22:44:19Z

‎Syntax and Parameters

Raffriff42: v901 changes

2016-08-15T01:09:43Z

v901 changes

Reel.Deal: heading

2015-12-23T13:37:03Z

heading

Reel.Deal: /* Description */

2014-09-21T08:44:10Z

‎Description

Reel.Deal: minor formatting

2014-09-21T08:43:51Z

minor formatting

Reel.Deal: category

2014-08-23T16:08:22Z

Reel.Deal: /* Description */

2014-06-14T02:48:34Z

‎Description

Reel.Deal: LWLibavAudioSource

2014-06-02T13:46:33Z

LWLibavAudioSource

New page

'''Back to [[LSMASHSource]] ←'''
-----------------------------------------------
 
 
== Description ==
:This function uses [http://en.wikipedia.org/wiki/Libavcodec#Implemented_audio_codecs libavcodec] as an audio decoder and [http://www.ffmpeg.org/libavformat.html libavformat] as a demuxer.

:: * If audio stream can be coded as lossy, do pre-roll whenever any seek of audio stream
 

== [[Script variables|Syntax and Parameters]] ==
:{{Template:FuncDef|LSMASHAudioSource (string source, int "stream_index", bool "cache", bool "av_sync", string "layout", int "rate")}}
 
::{{Par2|source|string| }}
:::The path to the source file; path can be omitted if the source file is in the same directory as the AviSynth script (*.avs).
 
::{{Par2|stream_index|int|-1}}
:::The stream index to open in the source file.
:::The value -1 means trying to get the first detected audio stream.
 
::{{Par2|cache|bool|true}}
:::Create the index file (.lwi) to the same directory as the source file if set to true.
:::The index file avoids parsing all frames in the source file at the next or later access
 
::{{Par2|av_sync|bool|false}}
:::Try Audio/Visual synchronization at the first video frame of the video stream activated in the index file if set to true.
 
::{{Par2|layout|string|""}}
:::Output audio channel layout.
:::If unspecified, audio stream is output to the buffer from the decoder via the resampler at the channel layout
:::which is the first maximum number of channels in audio stream.
:::You can specify channel layout by combination of the name of a channel layout with separator (+) as follows.
 
::::- The name or mask of a single channel.
:::::{| class="wikitable" border="1"; width="400px"
|-
|FL
|(0x1)
|=
|Front Left
|-
|FR
|(0x2)
|=
|Front Right
|-
|FC
|(0x4)
|=
|Front Center
|-
|LFE
|(0x8)
|=
|Low Frequency Effect
|-
|BL
|(0x10)
|=
|Back Left
|-
|BR
|(0x20)
|=
|Back Right
|-
|FLC
|(0x40)
|=
|Front Left of Center
|-
|FRC
|(0x80)
|=
|Front Right of Center
|-
|BC
|(0x100)
|=
|Back Center
|-
|SL
|(0x200)
|=
|Side Left
|-
|SR
|(0x400)
|=
|Side Right
|-
|TC
|(0x800)
|=
|Top Center
|-
|TFL
|(0x1000)
|=
|Top Front Left
|-
|TFC
|(0x2000)
|=
|Top Front Center
|-
|TFR
|(0x4000)
|=
|Top Front Right
|-
|TBL
|(0x8000)
|=
|Top Back Left
|-
|TBC
|(0x10000)
|=
|Top Back Center
|-
|TBR
|(0x20000)
|=
|Top Back Right
|-
|DL
|(0x20000000)
|=
|Stereo Downmixed Left
|-
|DR
|(0x40000000)
|=
|Stereo Downmixed Right
|-
|WL
|(0x80000000)
|=
|Wide Left
|-
|WR
|(0x100000000)
|=
|Wide Right
|-
|SDL
|(0x200000000)
|=
|Surround Direct Left
|-
|SDR
|(0x400000000)
|=
|Surround Direct Right
|-
|LFE2
|(0x800000000)
|=
|Low Frequency Effect 2
|-
! colspan="4"| $ Example: standard ffmpeg based 5.1ch surround layout : FL+FR+FC+LFE+BL+BR = 0x3f
|}
 
:::- The name of a usual channel layout.
::::{| class="wikitable" border="1"; width="570px"
|-
!!width="150px"|
!!width="20px"|
!!width="250px"|libav
!!width="250px"|ffmpeg
|-
|mono
|=
|FC
|FC
|-
|stereo
|=
|FL+FR
|FL+FR
|-
|2.1
|=
|FL+FR+LFE
|FL+FR+LFE
|-
|3.0
|=
|FL+FR+FC
|FL+FR+FC
|-
|3.0(back)
|=
|FL+FR+BC
|FL+FR+BC
|-
|3.1
|=
|FL+FR+FC+LFE
|FL+FR+FC+LFE
|-
|4.0
|=
|FL+FR+FC+BC
|FL+FR+FC+BC
|-
|quad
|=
|FL+FR+BL+BR
|FL+FR+BL+BR
|-
|quad(side)
|=
|FL+FR+SL+SR
||FL+FR+SL+SR
|-
|5.0
|=
|FL+FR+FC+SL+SR
|FL+FR+FC+BL+BR
|-
|5.1
|=
|FL+FR+FC+LFE+SL+SR
|FL+FR+FC+LFE+BL+BR
|-
|6.0
|=
|FL+FR+FC+BC+SL+SR
|FL+FR+FC+BC+SL+SR
|-
|6.0(front)
|=
|FL+FR+FLC+FRC+SL+SR
|FL+FR+FLC+FRC+SL+SR
|-
|hexagonal
|=
|FL+FR+FC+BL+BR+BC
|FL+FR+FC+BL+BR+BC
|-
|6.1
|=
|FL+FR+FC+LFE+BC+SL+SR
|FL+FR+FC+LFE+BC+SL+SR
|-
|6.1(front)
|=
|FL+FR+LFE+FLC+FRC+SL+SR
|FL+FR+LFE+FLC+FRC+SL+SR
|-
|7.0
|=
|FL+FR+FC+BL+BR+SL+SR
|FL+FR+FC+BL+BR+SL+SR
|-
|7.0(front)
|=
|FL+FR+FC+FLC+FRC+SL+SR
|FL+FR+FC+FLC+FRC+SL+SR
|-
|7.1
|=
|FL+FR+FC+LFE+BL+BR+SL+SR
|FL+FR+FC+LFE+BL+BR+SL+SR
|-
|7.1(wide)
|=
|FL+FR+FC+LFE+FLC+FRC+SL+SR
|FL+FR+FC+LFE+BL+BR+FLC+FRC
|-
|7.1(wide-side)
|=
|N/A
|FL+FR+FC+LFE+FLC+FRC+SL+SR
|-
|octagonal
|=
|FL+FR+FC+BL+BR+BC+SL+SR
|FL+FR+FC+BL+BR+BC+SL+SR
|-
|downmix
|=
|DL+DR
|DL+DR
|}
 
:::- Number of channels.
::::{| class="wikitable" border="1"; width="570px"
|-
!!width="100px"|
!!width="20px"|
!!width="200px"| libav
!!width="200px"| ffmpeg
|-
|1
|=
|FC
|FC
|-
|2
|=
|FL+FR
|FL+FR
|-
|3
|=
|FL+FR+FC
|FL+FR+LFE
|-
|4
|=
|FL+FR+BL+BR
|FL+FR+FC+BC
|-
|5
|=
|FL+FR+FC+SL+SR
|FL+FR+FC+BL+BR
|-
|6
|=
|FL+FR+FC+LFE+SL+SR
|FL+FR+FC+LFE+BL+BR
|-
|7
|=
|FL+FR+FC+LFE+BC+SL+SR
|FL+FR+FC+LFE+BC+SL+SR
|-
|8
|=
|FL+FR+FC+LFE+BL+BR+SL+SR
|FL+FR+FC+LFE+BL+BR+SL+SR
|}

:::Note: the above listed notations are the present things.
:::In the future, they might be changed.
 
::{{Par2|rate|int|0}}
:::Audio sampling rate or sampling frequency in units of Hz.
:::The value 0 means audio stream is output to the buffer via the resampler at the maximum sampling rate in audio stream.
:::Otherwise, audio stream is output to the buffer via the resampler at specified sampling rate.
 
== Examples ==
LWLibavAudioSource with default settings:
LWLibavAudioSource(source="source.m2t2", stream_index=-1, cache=true, av_sync=false, layout="", rate=0)
 
 
 
-----------------------------------------------
'''Back to [[LSMASHSource]] ←'''

@@ Line 1: / Line 1: @@
 {{FilterCat|External_filters|Plugin_functions|Source_filters}}
+'''LWLibavAudioSource''' uses [http://en.wikipedia.org/wiki/Libav#Audio_codecs libavcodec] as an audio decoder and libavformat as a demuxer.<br>
-'''Back to [[LSMASHSource]] &larr;'''
------------------------------------------------
-<br>
-== Description ==
-This function uses [http://en.wikipedia.org/wiki/Libav#Audio_codecs libavcodec] as an audio decoder and libavformat as a demuxer.<br>
 *If audio stream can be coded as lossy, do pre-roll whenever any seek of audio stream.
 <br>
 == [[Script variables|Syntax and Parameters]] ==
-:{{Template:FuncDef|LSMASHAudioSource (string source, int "stream_index", bool "cache", bool "av_sync", string "layout", int "rate")}}
+:{{Template:FuncDef|LWLibavAudioSource (string source, int "stream_index", bool "cache", bool "av_sync", string "layout", int "rate")}}
 <br>
 ::{{Par2|source|string| }}

@@ Line 1: / Line 1: @@
-[[Category:Plugin_Filters]]
+{{FilterCat|External_filters|Plugin_functions|Source_filters}}
-[[Category:Source_filters]]
 '''Back to [[LSMASHSource]] &larr;'''
 -----------------------------------------------
 <br>
 == Description ==
-:This function uses [http://en.wikipedia.org/wiki/Libav#Audio_codecs libavcodec] as an audio decoder and libavformat as a demuxer.
+This function uses [http://en.wikipedia.org/wiki/Libav#Audio_codecs libavcodec] as an audio decoder and libavformat as a demuxer.<br>
+*If audio stream can be coded as lossy, do pre-roll whenever any seek of audio stream.
-:: * If audio stream can be coded as lossy, do pre-roll whenever any seek of audio stream
+<br>
 <br>
 == [[Script variables|Syntax and Parameters]] ==
 :{{Template:FuncDef|LSMASHAudioSource (string source, int "stream_index", bool "cache", bool "av_sync", string "layout", int "rate")}}
@@ Line 349: / Line 347: @@
 LWLibavAudioSource with default settings:
   LWLibavAudioSource(source="source.m2t2", stream_index=-1, cache=true, av_sync=false, layout="", rate=0)
 <br>
 <br>
 -----------------------------------------------
 '''Back to [[LSMASHSource]] &larr;'''

← Older revision		Revision as of 16:08, 23 August 2014
Line 1:		Line 1:
		+	[[Category:Plugin_Filters]]
		+	[[Category:Source_filters]]
	'''Back to [[LSMASHSource]] ←'''		'''Back to [[LSMASHSource]] ←'''
	-----------------------------------------------		-----------------------------------------------

@@ Line 341: / Line 341: @@
 :::Same as 'decoder' of [[LSMASHSource/LSMASHVideoSource|LSMASHVideoSource]].
 <br>
 == Examples ==
 LWLibavAudioSource with default settings:

@@ Line 5: / Line 5: @@
 == [[Script variables|Syntax and Parameters]] ==
-:{{Template:FuncDef|LWLibavAudioSource (string source, int "stream_index", bool "cache", bool "av_sync", string "layout", int "rate")}}
+:{{Template:FuncDef|LWLibavAudioSource (string source, int "stream_index", bool "cache", bool "av_sync", string "layout", int "rate", string&nbsp;"decoder")}}
 <br>
 ::{{Par2|source|string| }}
@@ Line 330: / Line 330: @@
 |FL+FR+FC+LFE+BL+BR+SL+SR
 |}
 :::Note: the above listed notations are the present things.
 :::In the future, they might be changed.
@@ Line 338: / Line 337: @@
 :::The value 0 means audio stream is output to the buffer via the resampler at the maximum sampling rate in audio stream.
 :::Otherwise, audio stream is output to the buffer via the resampler at specified sampling rate.
 <br>
 == Examples ==
 LWLibavAudioSource with default settings:
-  LWLibavAudioSource(source="source.m2t2", stream_index=-1, cache=true, av_sync=false, layout="", rate=0)
+  LWLibavAudioSource(source="source.m2t2", stream_index=-1, cache=true,
 <br>
 <br>
 -----------------------------------------------
 '''Back to [[LSMASHSource]] &larr;'''