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vwutrim.js
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function trim(){
if (videoDecoder.state==="configured"){
videoDecoder.reset();
}
if (videoDecoder.state==="unconfigured"){
var config = {
codec:codecinfo,
codedWidth:videoinfo.width/2,
codedHeight: videoinfo.height/2,
description:avcC,
}
videoDecoder.configure(config);
}
var init = {
type: 'key',
data: keyframe,
timestamp: 2000,
duration: 37,
};
var chunk = new EncodedVideoChunk(init);
videoDecoder.decode(chunk);
clearInterval(intervalid);
clearInterval(videointerval)
var start = parseFloat(document.getElementById("start").value);
var end = parseFloat(document.getElementById("end").value);
time=0;
var final = end - start;
if(source){
source.stop();
}
if (waveformsource){
waveformsource.stop();
}
document.getElementById("timer").innerHTML = time;
if (check === null ){
document.getElementById("error").innerHTML = "Please select a file"
}
else if (array===null){
document.getElementById("error").innerHTML = "No data available"
}
else if (isNaN(start)){
document.getElementById("error").innerHTML = "Starting point is not a number"
}
else if (start >= source.buffer.duration){
document.getElementById("error").innerHTML = "starting point is greater than or equal to source buffer duration"
}
else if (start < 0 )
{
document.getElementById("error").innerHTML = "Starting Point must be greater than 0"
}
else if (start >= end) {
document.getElementById("error").innerHTML = "Starting Point must be less than Ending Point"
}
else if (isNaN(end)){
document.getElementById("error").innerHTML = "Ending Point is not a number"
}
else if ( end >= source.buffer.duration ){
document.getElementById("error").innerHTML = "Ending point is greater than or equal to duration"
end < 0 }
else if ( end <= start){
document.getElementById("error").innerHTML = "Ending Point is greater than equal to Starting Point"
}
else{
document.getElementById("timer").innerHTML = time;
array.splice(parseInt(start*audiocontext.sampleRate), parseInt(final*audiocontext.sampleRate));
videodata.splice(parseInt(start*videoinfo.samplerate), parseInt(final*videoinfo.samplerate))
document.getElementById("start").value="";
document.getElementById("end").value="";
document.getElementById("totallength").innerHTML=array.length;
source = audiocontext.createBufferSource();
var array1 = new Float32Array(array);
var audiobuffer = audiocontext.createBuffer(1, array.length, audiocontext.sampleRate);
var ab1= audiobuffer.getChannelData(0);
ab1.set(array);
source.buffer=audiobuffer;
source.connect(audiocontext.destination);
source.start(0,0,0)
sourceduration = source.buffer.duration;
document.getElementById("duration").innerHTML = source.buffer.duration.toFixed(3);
if ( source.buffer.duration >=1){
intervalid = setInterval(()=>{
time++;
document.getElementById("timer").innerHTML = time;
if (time === parseInt(source.buffer.duration)){
clearInterval(intervalid);
}
}, 1000);
}
}}