View source for Waveform

{{FilterCat|External_filters|Plugins|Audio_filters}}
{{Filter3
| {{Author/David Horman}}
| v0.3
| 3=[http://horman.net/waveform0.3.zip waveform0.3.zip]
| 4=Audio filters
| 5=?
| 6=[http://forum.doom9.org/showthread.php?t=165703 Doom9 Thread]}}
<br>
== Description ==
Inspired by [[AudioGraph]], waveform is a plugin to overlay audio waveforms on video clips - useful for identifying sync issues and audio glitches.

Improvements over AudioGraph are:
*A nicer, variable height overlay
*Separate graphs for each channel, works with an arbitrary number of channels
*Works with YV12 video, as well as RGB24/RGB32/YUY2
*Audio format is passed through unchanged
<br>
== Requirements ==
* AviSynth 2.5.8 or later
* Supported color formats: [[RGB24]], [[RGB32]], [[YUY2]], [[YV12]]
<br>
== [[Script variables|Syntax and Parameters]] ==

:{{Template:FuncDef|waveform (clip, int "window", float "height", bool "under", float "zoom", bool "marks")}}
<br>
::{{Par2| |clip| }}
:::Input clip; must contain audio and video.
<br>
::{{Par2|window|int|1}}
:::The number of frames either side to display a waveform for (default: 1).
<br>
::{{Par2|height|float|0.333}}
:::*>=1 : height in pixels of each audio channel displayed
:::*<1 : total height of waveform display as a fraction of video height (default: 0.333)

<br>
::{{Par2|under|bool|false}}
:::If true, display the waveform underneath the video instead of superimposed on it (default: false).
<br>
::{{Par2|zoom|float|1.0}}
:::Scale up the waveform.
<br>
::{{Par2|marks|bool|true}}
:::Display frame boundary marks (default: true).
<br>
== Examples ==
waveform with default values:
 [[AviSource]]("blah.avi") # make sure clip has audio and video
 ViewAudio(frames=2, top=-1, height=80, fill=true, channel=-1)
<br>
== Changelog ==
 Version      Date            Changes<br>
 v0.3         2015/02/28      - new parameter: "marks"
                              - mitigate crash when "window" is set to high values<br>
 v0.2         2012/10/06      - commented out the function which uses vsprintf_s
                              - hopefully fixed those rowsize/pitch issues (but only for YV12/YUY2 so far)<br>
 v0.2         2012/08/19      - initial release
<br>
== Archived Downloads ==
{| class="wikitable" border="1"; width="600px"
|-
!!width="100px"| Version
!!width="150px"| Download
!!width="150px"| Mirror
|-
!v0.3
|[http://horman.net/waveform0.3.zip waveform0.3.zip]
|[http://web.archive.org/web/20150228155227/http://horman.net/avisynth/download/waveform0.3.zip waveform0.3.zip]
|-
!v0.2
|[http://horman.net/waveform0.2.zip waveform0.2.zip]
|[http://web.archive.org/web/20130413095328/http://horman.net/waveform0.2.zip waveform0.2.zip]
|}
<br>
==External Links ==
<br>
<br>
-----------------------------------------------
'''Back to [[External_filters#Audio_Filters|External Filters]] &larr;'''