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Exemple de boutons d’action pour une collection collaborative
27 février 2013, par
Mis à jour : Mars 2013
Langue : français
Type : Image
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Exemple de boutons d’action pour une collection personnelle
27 février 2013, par
Mis à jour : Février 2013
Langue : English
Type : Image
Autres articles (83)
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Use, discuss, criticize
13 avril 2011, parTalk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
A discussion list is available for all exchanges between users. -
Installation en mode standalone
4 février 2011, parL’installation de la distribution MediaSPIP se fait en plusieurs étapes : la récupération des fichiers nécessaires. À ce moment là deux méthodes sont possibles : en installant l’archive ZIP contenant l’ensemble de la distribution ; via SVN en récupérant les sources de chaque modules séparément ; la préconfiguration ; l’installation définitive ;
[mediaspip_zip]Installation de l’archive ZIP de MediaSPIP
Ce mode d’installation est la méthode la plus simple afin d’installer l’ensemble de la distribution (...) -
Multilang : améliorer l’interface pour les blocs multilingues
18 février 2011, parMultilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela.
Sur d’autres sites (11030)
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How to save/encode recorded raw PCM Data as AAC/MP4 format file in Android
28 janvier 2015, par INVISIBLEi want to save recorder pcm data as aac/mp4 format file.
i am using AudioRecord class for recording audio in android. i have success fully saved it as wave file by adding a wave header to raw data. but dont know how to save it as aac/mp4 file, because aac/mp4 format is compressed then wave.
the methods i am using for saving pcm data as wave is pasted below.recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,
SavedSampleRate, RECORDER_CHANNELS, RECORDER_AUDIO_ENCODING,
bufferSize);
recorder.startRecording();
isRecording = true;
isRecording = true;
recordingThread = new Thread(new Runnable() {
@Override
public void run() {
writeAudioDataToFile();
}
}, "AudioRecorder Thread");
recordingThread.start();second
private void writeAudioDataToFile() {
byte data[] = new byte[bufferSize];
// short sData[] = new short[bufferSize];
String filename = getTempFilename();
FileOutputStream os = null;
try {
os = new FileOutputStream(filename);
} catch (Exception e) {
e.printStackTrace();
}
int read = 0;
if (null != os) {
while (isRecording) {
double sum = 0;
read = recorder.read(data, 0, bufferSize);
if (AudioRecord.ERROR_INVALID_OPERATION != read) {
try {
synchronized (this) {
// Necessary in order to convert negative shorts!
final int USHORT_MASK = (1 << 16) - 1;
final ByteBuffer buf = ByteBuffer.wrap(data).order(
ByteOrder.LITTLE_ENDIAN);
final ByteBuffer newBuf = ByteBuffer.allocate(
data.length).order(ByteOrder.LITTLE_ENDIAN);
int sample;
while (buf.hasRemaining()) {
short shortSample = buf.getShort();
sample = (int) shortSample & USHORT_MASK;
sample = sample * db_value_global;
sample = mRmsFilterSetting.filter
.apply((((int) 0) | shortSample)
* db_value_global);
newBuf.putShort((short) sample);
}
data = newBuf.array();
os.write(data);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
try {
os.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}and finally saving it as
private void copyWaveFile(ArrayList<string> inFilename, String outFilename) {
FileInputStream[] in = null;
FileOutputStream out = null;
long totalAudioLen = 0;
long totalDataLen = totalAudioLen + 36;
long longSampleRate = SavedSampleRate;
int channels = 2;
long byteRate = RECORDER_BPP * SavedSampleRate * channels / 8;
byte[] data = new byte[bufferSize];
try {
out = new FileOutputStream(outFilename);
in = new FileInputStream[inFilename.size()];
for (int i = 0; i < in.length; i++) {
in[i] = new FileInputStream(inFilename.get(i));
totalAudioLen += in[i].getChannel().size();
}
totalDataLen = totalAudioLen + 36;
WriteWaveFileHeader(out, totalAudioLen, totalDataLen,
longSampleRate, channels, byteRate);
for (int i = 0; i < in.length; i++) {
while (in[i].read(data) != -1) {
out.write(data);
}
in[i].close();
}
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
private void WriteWaveFileHeader(FileOutputStream out, long totalAudioLen,
long totalDataLen, long longSampleRate, int channels, long byteRate)
throws IOException {
byte[] header = new byte[44];
header[0] = 'R'; // RIFF/WAVE header
header[1] = 'I';
header[2] = 'F';
header[3] = 'F';
header[4] = (byte) (totalDataLen & 0xff);
header[5] = (byte) ((totalDataLen >> 8) & 0xff);
header[6] = (byte) ((totalDataLen >> 16) & 0xff);
header[7] = (byte) ((totalDataLen >> 24) & 0xff);
header[8] = 'W';
header[9] = 'A';
header[10] = 'V';
header[11] = 'E';
header[12] = 'f'; // 'fmt ' chunk
header[13] = 'm';
header[14] = 't';
header[15] = ' ';
header[16] = 16; // 4 bytes: size of 'fmt ' chunk
header[17] = 0;
header[18] = 0;
header[19] = 0;
header[20] = 1; // format = 1
header[21] = 0;
header[22] = (byte) channels;
header[23] = 0;
header[24] = (byte) (longSampleRate & 0xff);
header[25] = (byte) ((longSampleRate >> 8) & 0xff);
header[26] = (byte) ((longSampleRate >> 16) & 0xff);
header[27] = (byte) ((longSampleRate >> 24) & 0xff);
header[28] = (byte) (byteRate & 0xff);
header[29] = (byte) ((byteRate >> 8) & 0xff);
header[30] = (byte) ((byteRate >> 16) & 0xff);
header[31] = (byte) ((byteRate >> 24) & 0xff);
header[32] = (byte) (2 * 16 / 8); // block align
header[33] = 0;
header[34] = RECORDER_BPP; // bits per sample
header[35] = 0;
header[36] = 'd';
header[37] = 'a';
header[38] = 't';
header[39] = 'a';
header[40] = (byte) (totalAudioLen & 0xff);
header[41] = (byte) ((totalAudioLen >> 8) & 0xff);
header[42] = (byte) ((totalAudioLen >> 16) & 0xff);
header[43] = (byte) ((totalAudioLen >> 24) & 0xff);
out.write(header, 0, 44);
}
</string>in this piece of code i am recording small PCM files with AudioRecord and saving them as wave file by adding wave header.
is there any step by step tutorial for how to save pcm data as mp4/aac file.
thanks in advance.
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Transcode video and upload on amazon s3
7 juillet 2019, par devI want to transcode video in 360p, 480p, 720p and then upload to amazon s3.
Currently we are using php library FFMPEG
I have successfully transcode video on my server. But I did not get that how to achieve same on amazon s3.
Do I need to first upload original video on s3 and then get that video and transcode in different format and send to amazon s3 ? is it possible ?
Or if any other way than please suggest me.
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Meaning of "ffprobe -v trace demo.mp4" output
17 mai 2019, par blueskyThe ’mdat box’ of Mp4 file may at the last of file. I want to know the position of ’mdat’ box using ’ffmpeg’ or ’ffprobe’.
Mp4 consists of ’ftyp’, ’moov’ and ’mdat’ BOX. each BOX consists of "BoxHeader" and "BoxData". "BoxHeader" consists of "BoxSize(4Byte)", "BoxType(4Byte)", "BoxLargesize(8Byte, only have when box size exceeding the range of 4Byte expression, then the value of BoxSize is 1)".
In program, you could first read 8 Byte and know the size of ’ftyp box’, then seek the size and read 8 Byte to know if the next box is ’moov box’. If not ’moov’, it shoud be ’mdat box’, then seek cross ’mdat box’ to find ’mdat box’...
But I want to use ’ffprobe’ to find the position of ’moov’. I use ’ffprobe -v trace demo.mp4’, and output is like below
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fc8fd000e00] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fc8fd000e00] type:'ftyp' parent:'root' sz: 28 8 41044500
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fc8fd000e00] ISO: File Type Major Brand: mp42
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fc8fd000e00] type:'moov' parent:'root' sz: 17943 36 41044500
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fc8fd000e00] type:'mvhd' parent:'moov' sz: 108 8 17935I want to know the meaning of
type:'ftyp' parent:'root' sz: 28 8 41044500:
type:'ftyp' parent:'root'is easy to know,sz: 28 8 41044500is really make me confused, I guess28is size of ftyp box,but the meaning of8 41044500is what ?Could you explain the meaning of
sz: 28 8 41044500, and where could find the doc ?
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