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Médias (33)
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Stereo master soundtrack
17 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Audio
-
#7 Ambience
16 octobre 2011, par
Mis à jour : Juin 2015
Langue : English
Type : Audio
-
#6 Teaser Music
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
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#5 End Title
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
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#3 The Safest Place
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
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#4 Emo Creates
15 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
Autres articles (82)
-
Participer à sa traduction
10 avril 2011Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
Actuellement MediaSPIP n’est disponible qu’en français et (...) -
Les autorisations surchargées par les plugins
27 avril 2010, parMediaspip core
autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs -
Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir
Sur d’autres sites (10365)
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audio convert to mp3,pcm and vox using ffmpeg
8 juillet 2014, par user3789242Please can someone help me with the code for ffmpeg.
I have to useffmpegto convert a recorder voice (using HTML5) intomp3,pcmorvoxdepending on the user’s selection.
I don’t know how to write the code forffmpegif some one can help me with the code or libraries.
Thank you in advance.Here is my code for recording the voice with a visualizer :
// variables
var leftchannel = [];
var rightchannel = [];
var recorder = null;
var recording = false;
var recordingLength = 0;
var volume = null;
var audioInput = null;
var sampleRate = 44100;
var audioContext = null;
var context = null;
var outputString;
if (!navigator.getUserMedia)
navigator.getUserMedia = navigator.getUserMedia ||
navigator.webkitGetUserMedia ||
navigator.mozGetUserMedia ||
navigator.msGetUserMedia;
if (navigator.getUserMedia){
navigator.getUserMedia({audio:true}, success, function(e) {
alert('Error capturing audio.');
});
} else alert('getUserMedia not supported in this browser.');
function getVal(value)
{
// if R is pressed, we start recording
if ( value == "record"){
recording = true;
// reset the buffers for the new recording
leftchannel.length = rightchannel.length = 0;
recordingLength = 0;
document.getElementById('output').innerHTML="Recording now...";
// if S is pressed, we stop the recording and package the WAV file
} else if ( value == "stop" ){
// we stop recording
recording = false;
document.getElementById('output').innerHTML="Building wav file...";
// we flat the left and right channels down
var leftBuffer = mergeBuffers ( leftchannel, recordingLength );
var rightBuffer = mergeBuffers ( rightchannel, recordingLength );
// we interleave both channels together
var interleaved = interleave ( leftBuffer, rightBuffer );
var buffer = new ArrayBuffer(44 + interleaved.length * 2);
var view = new DataView(buffer);
// RIFF chunk descriptor
writeUTFBytes(view, 0, 'RIFF');
view.setUint32(4, 44 + interleaved.length * 2, true);
writeUTFBytes(view, 8, 'WAVE');
// FMT sub-chunk
writeUTFBytes(view, 12, 'fmt ');
view.setUint32(16, 16, true);
view.setUint16(20, 1, true);
// stereo (2 channels)
view.setUint16(22, 2, true);
view.setUint32(24, sampleRate, true);
view.setUint32(28, sampleRate * 4, true);
view.setUint16(32, 4, true);
view.setUint16(34, 16, true);
// data sub-chunk
writeUTFBytes(view, 36, 'data');
view.setUint32(40, interleaved.length * 2, true);
var lng = interleaved.length;
var index = 44;
var volume = 1;
for (var i = 0; i < lng; i++){
view.setInt16(index, interleaved[i] * (0x7FFF * volume), true);
index += 2;
}
var blob = new Blob ( [ view ], { type : 'audio/wav' } );
// let's save it locally
document.getElementById('output').innerHTML='Handing off the file now...';
var url = (window.URL || window.webkitURL).createObjectURL(blob);
var li = document.createElement('li');
var au = document.createElement('audio');
var hf = document.createElement('a');
au.controls = true;
au.src = url;
hf.href = url;
hf.download = 'audio_recording_' + new Date().getTime() + '.wav';
hf.innerHTML = hf.download;
li.appendChild(au);
li.appendChild(hf);
recordingList.appendChild(li);
}
}
function success(e){
audioContext = window.AudioContext || window.webkitAudioContext;
context = new audioContext();
volume = context.createGain();
// creates an audio node from the microphone incoming stream(source)
source = context.createMediaStreamSource(e);
// connect the stream(source) to the gain node
source.connect(volume);
var bufferSize = 2048;
recorder = context.createScriptProcessor(bufferSize, 2, 2);
//node for the visualizer
analyser = context.createAnalyser();
analyser.smoothingTimeConstant = 0.3;
analyser.fftSize = 512;
splitter = context.createChannelSplitter();
//when recording happens
recorder.onaudioprocess = function(e){
if (!recording) return;
var left = e.inputBuffer.getChannelData (0);
var right = e.inputBuffer.getChannelData (1);
leftchannel.push (new Float32Array (left));
rightchannel.push (new Float32Array (right));
recordingLength += bufferSize;
// get the average for the first channel
var array = new Uint8Array(analyser.frequencyBinCount);
analyser.getByteFrequencyData(array);
var c=document.getElementById("myCanvas");
var ctx = c.getContext("2d");
// clear the current state
ctx.clearRect(0, 0, 1000, 325);
var gradient = ctx.createLinearGradient(0,0,0,300);
gradient.addColorStop(1,'#000000');
gradient.addColorStop(0.75,'#ff0000');
gradient.addColorStop(0.25,'#ffff00');
gradient.addColorStop(0,'#ffffff');
// set the fill style
ctx.fillStyle=gradient;
drawSpectrum(array);
function drawSpectrum(array) {
for ( var i = 0; i < (array.length); i++ ){
var value = array[i];
ctx.fillRect(i*5,325-value,3,325);
}
}
}
function getAverageVolume(array) {
var values = 0;
var average;
var length = array.length;
// get all the frequency amplitudes
for (var i = 0; i < length; i++) {
values += array[i];
}
average = values / length;
return average;
}
// we connect the recorder(node to destination(speakers))
volume.connect(splitter);
splitter.connect(analyser, 0, 0);
analyser.connect(recorder);
recorder.connect(context.destination);
}
function mergeBuffers(channelBuffer, recordingLength){
var result = new Float32Array(recordingLength);
var offset = 0;
var lng = channelBuffer.length;
for (var i = 0; i < lng; i++){
var buffer = channelBuffer[i];
result.set(buffer, offset);
offset += buffer.length;
}
return result;
}
function interleave(leftChannel, rightChannel){
var length = leftChannel.length + rightChannel.length;
var result = new Float32Array(length);
var inputIndex = 0;
for (var index = 0; index < length; ){
result[index++] = leftChannel[inputIndex];
result[index++] = rightChannel[inputIndex];
inputIndex++;
}
return result;
}
function writeUTFBytes(view, offset, string){
var lng = string.length;
for (var i = 0; i < lng; i++){
view.setUint8(offset + i, string.charCodeAt(i));
}
} -
How can I export a video with a widget overlay in a Flutter app ?
30 juin 2024, par Mohammed BekeleI'm developing a Flutter app for a embedding caption on a videos that need to be export as video file after processing it. I'm utilizing the flutter_ffmpeg_kit package. However, I'm having trouble getting the export to work properly.


Here's the code I'm using :


initially this is my stack :


Expanded(
 child: Stack(
 children: [
 Center(
 child: _videoPlayerController.value.isInitialized
 ? AspectRatio(
 aspectRatio:
 _videoPlayerController.value.aspectRatio,
 child: VideoPlayer(_videoPlayerController),
 )
 : CircularProgressIndicator(),
 ),
 if (_currentCaption.isNotEmpty)
 Positioned.fill(
 child: Center(child: _buildCaptionText()),
 ),
 ],
 ),
 ),


and in export button i executed this function


Future<void> _exportVideo() async {
 setState(() {
 _isProcessing = true;
 });

 try {
 final directory = await getExternalStorageDirectory();
 final rootPath = directory?.parent.parent.parent.parent.path;
 final mobixPath = path.join(rootPath!, 'Mobix App');
 final appPath = path.join(mobixPath, 'Caption');
 final outputPath = path.join(appPath, 'Output');

 // Create the directories if they don't exist
 await Directory(outputPath).create(recursive: true);

 final timestamp = DateTime.now().millisecondsSinceEpoch;
 final outputFilePath = path.join(outputPath, 'output-$timestamp.mp4');


 // Generate the FFmpeg command
 final ffmpegCommand = _generateFFmpegCommand(
 widget.videoPath,
 outputFilePath,
 widget.words,
 _fontSize,
 _isBold,
 _isItalic,
 _fontColor,
 _backgroundColor,
 );

 // Execute the FFmpeg command
 await FFmpegKit.execute(
 ffmpegCommand,
 ).then(
 (session) async {
 // Update progress if needed
 final returnCode = await session.getReturnCode();
 if (ReturnCode.isSuccess(returnCode)) {
 setState(() {
 _outputFilePath = outputFilePath;
 });
 ScaffoldMessenger.of(context).showSnackBar(
 SnackBar(content: Text('Export successful: $_outputFilePath')),
 );
 } else {
 print('Export failed with rc: $returnCode');

 ScaffoldMessenger.of(context).showSnackBar(
 SnackBar(content: Text('Export failed with rc: $returnCode')),
 );
 }
 setState(() {
 _isProcessing = false;
 });
 },
 );
 } catch (e) {
 print('Export failed: $e');
 ScaffoldMessenger.of(context).showSnackBar(
 SnackBar(content: Text('Export failed: $e')),
 );
 setState(() {
 _isProcessing = false;
 });
 }
 }

 String _generateFFmpegCommand(
 String inputPath,
 String outputPath,
 List<dynamic> words,
 double fontSize,
 bool isBold,
 bool isItalic,
 Color fontColor,
 Color backgroundColor,
 ) {
 final ffmpegCommand = StringBuffer();

 // Add input file
 ffmpegCommand.write('-i $inputPath ');

 // Add subtitles filter
 final subtitleFilter = StringBuffer();
 for (var word in words) {
 final startTime = word['startTime'].toDouble();
 final endTime = word['endTime'].toDouble();
 final caption = word['word'];

 final fontStyle = isBold && isItalic
 ? 'bold italic'
 : isBold
 ? 'bold'
 : isItalic
 ? 'italic'
 : 'normal';
 final fontColorHex = fontColor.value.toRadixString(16).substring(2);
 final backgroundColorHex =
 backgroundColor.value.toRadixString(16).substring(2);

 subtitleFilter.write(
 "drawtext=text='$caption':x=(w-tw)/2:y=h-(2*lh):fontcolor=$fontColorHex:fontsize=$fontSize:fontStyle=$fontStyle:box=1:boxcolor=$backgroundColorHex@0.5:boxborderw=5:enable='between(t,$startTime,$endTime)',");
 }
 ffmpegCommand.write('-vf "${subtitleFilter.toString()}" ');

 // Add output file
 ffmpegCommand.write('$outputPath');

 return ffmpegCommand.toString();
 }
</dynamic></void>

When I run this it returns ReturnCode 1. What am i doing wrong ?


-
How to combine three ffmpeg commands into one ?
26 juillet 2018, par NaneI am pretty confused that how to combine three ffmpeg commnads into one which also consists of two inputs.
// rescale with certain dimension
ffmpeg -i front.mp4 -filter_complex scale=600:400 rescale.mp4
//Attach to image
ffmpeg -i 600800.jpg -i rescale.mp4 -filter_complex "overlay=(W-w)/2:(H-h)/2" final.mp4
// After Changed to specific even size Burn Subtitles with Draw Text
ffmpeg -i final.mp4 -filter_complex "drawtext=fontfile=Lucida Grande.ttf:text='I am TEXT':fontsize=72:fontcolor=white:x=50:y=100,subtitles=sample.srt:force_style='Fontsize=22,OutlineColour=&H55000000,BorderStyle=3'" CheckMe.mp4
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