Waveform

Revision as of 02:24, 17 March 2020

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

Requirements

• AviSynth 2.5.8 or later
• Supported color formats: RGB24, RGB32, YUY2, YV12

Syntax and Parameters

waveform (clip, int "window", float "height", bool "under", float "zoom", bool "marks")

clip   =

Input clip; must contain audio and video.

int  window = 1

The number of frames either side to display a waveform for (default: 1).

float  height = 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)

bool  under = false

If true, display the waveform underneath the video instead of superimposed on it (default: false).

float  zoom = 1.0

Scale up the waveform.

bool  marks = true

Display frame boundary marks (default: true).

Examples

waveform with default values:

AviSource("blah.avi") # make sure clip has audio and video
waveform(window=1, height=0.333, under=false, zoom=1.0, marks=true)

Changelog

Version      Date            Changes

v0.3         2015/02/28      - new parameter: "marks"
                             - mitigate crash when "window" is set to high values

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)

v0.1         2012/08/19      - initial release

Archived Downloads

External Links

Back to External Filters ←