Remove silence Script for Premiere Pro

[Simon28404974nf7r]

Hello! 🙂 I'm new to Premiere Pro Scripting but not new to coding. 

I've got PP2023 and I'm using JSX Launcher to run my jsx code as ExtendScript won't work on my Mac

I'm trying to create a script which will delete any silences from my project to make my editing faser.

I've made some very simple scripts for JSX (counting the clips etc) which work find. But the script I'm using to cut the silences is doing nothing. Can anyone tell me where I'm going wrong please? 

// Define the noise level, minimum time, and offset time
var noiseLevel = 0.1; // 10%
var minTime = 1; // 1 second
var offsetTime = 0.5; // 0.5 seconds

// Get the active sequence
var activeSequence = app.project.activeSequence;

// Get the audio tracks in the active sequence
var audioTracks = activeSequence.audioTracks;

// Loop through each audio track
for (var i = 0; i < audioTracks.numTracks; i++) {

// Get the audio clips in the current audio track
var audioClips = audioTracks[i].clips;

// Loop through each audio clip in the current audio track
for (var j = 0; j < audioClips.numItems; j++) {

// Get the current audio clip
var audioClip = audioClips[j];

// Get the audio components in the current audio clip
var audioComponents = audioClip.components;

// Get the corresponding video clip for the current audio clip
var videoClip = activeSequence.videoTracks[i].clips[j];

// Create an array to store the cut points for the current clip
var cutPoints = [];

// Loop through each audio component in the current audio clip
for (var k = 0; k < audioComponents.numItems; k++) {

// Get the current audio component
var component = audioComponents[k];

// Check if the current audio component is silent
if (component.audioLevel <= noiseLevel && component.end-component.start >= minTime) {

// Add the start and end points of the silent component to the cut points array
cutPoints.push(component.start-offsetTime);
cutPoints.push(component.end+offsetTime);
}
}

// Sort the cut points array in ascending order
cutPoints.sort(function(a, b) {
return a - b;
});

// If there are any cut points, cut the video and audio clips between them
if (cutPoints.length > 0) {

// Cut the first clip from the start of the original clip to the first cut point
var firstClip = audioClip.clone();
firstClip.end = cutPoints[0];
videoClip.end = cutPoints[0];
audioClip.start = cutPoints[0];

// Cut the rest of the clips between the cut points
for (var l = 0; l < cutPoints.length; l += 2) {
var newClip = audioClip.clone();
newClip.start = cutPoints[l];
newClip.end = cutPoints[l+1];
videoClip.start = cutPoints[l];
videoClip.end = cutPoints[l+1];
}

// Cut the last clip from the last cut point to the end of the original clip
var lastClip = audioClip.clone();
lastClip.start = cutPoints[cutPoints.length-1];
videoClip.start = cutPoints[cutPoints.length-1];
audioClip.end = cutPoints[cutPoints.length-1];
}
}
}

[Kevin-Monahan]

Thanks for the question, Simon. Welcome to Adobe Premiere Pro forums. That is a very cool idea you have there, as this is a feature request I was recently upvoting. I know "delete silence" is possible via ffmpeg, so that may hold some clues if you look at that code. 

Make sure you click the "SDK" label when creating posts along these lines. It alerts our engineering manager who fosters such projects. I edited your post and did that for you. I hope you get a response soon. I wish you luck!

Thanks,

Kevin

[Simon28404974nf7r]

Thank you so much for the warm welcome Kevin! Really appreciate it. 🙂 

How do i change the label on this post please? I'll happily amend so it gets to the right people. 

And thank you so much. Has someone else managed to do this then? (I did have a search but might have missed their post). Thank you so much! Si

[Bruce Bullis]

It seems like you're getting the value of an audio volume setting, but I'm not certain you're getting anything like actual audio data. [If the volume setting is <= 0, the distinction matters less...]

[Simon28404974nf7r]

Good point Bruce. Thank you. I've amended it here to set a DB threshold (and to put markers for now, just to see if it's the cut feature that wasn't working!). But this still isn't doing anything. Is there any additional set-up I need to do (other than installing the JSX launcher) to run scripts please? I'm on a Mac if that makes any difference. 

// Set the threshold for silence (in decibels)
var silenceThreshold = -48;

// Get the active sequence
var activeSequence = app.project.activeSequence;

// Get the first audio track in the active sequence
var audioTrack = activeSequence.audioTracks[0];

// Get the audio clips in the first audio track
var audioClips = audioTrack.clips;

// Loop through each audio clip in the first audio track
for (var i = 0; i < audioClips.numItems; i++) {

// Get the current audio clip
var audioClip = audioClips[i];

// Get the audio components in the current audio clip
var audioComponents = audioClip.components;

// Loop through each audio component in the current audio clip
for (var j = 0; j < audioComponents.numItems; j++) {

// Get the current audio component
var component = audioComponents[j];

// Check if the current audio component is silent
if (component.audioLevels[0].level <= silenceThreshold) {

// Get the start and end time of the current audio component
var start = component.start;
var end = component.end;

// Add a marker at the start of the silent section
var marker = activeSequence.createMarker(start);
marker.name = "Silence start";

// Add a marker at the end of the silent section
var marker = activeSequence.createMarker(end);
marker.name = "Silence end";
}
}
}

[Bruce Bullis · Accepted solution]

I don't think that the value of the volume parameter, will have anything to do with the actual audio amplitude coming from that trackItem, at a given time. 

There is no access to audio data, from within the ExtendScript API. 

[arturos62950942]

¿Any updates on this? i been doing basic scripts but i cant find a way to do this, theres an extension that do it so i know is posible.

[Bruce Bullis]

There have been no changes to PPro's ExtendScript API. 

I'm not sure 'Level' is getting you useful data; you're checking a Level setting associated with a trackItem; you're not checking the value of a VU meter, or actual audio data.

[Bed30321077z973]

Any news since?

I will check this ffmeg to see if it work out in the meantime.