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Autres articles (96)
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MediaSPIP 0.1 Beta version
25 avril 2011, parMediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...) -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...) -
ANNEXE : Les plugins utilisés spécifiquement pour la ferme
5 mars 2010, parLe site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)
Sur d’autres sites (9646)
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One subtitle "page" to Image via FFMPEG
12 mai 2017, par EdwinI love FFMPEG since it can do so much. But one thing I have been wondering. Is it actually possible to have one subtitle page converted into a transparent (PNG) image ?
I know I can embed (burn) an SRT stream into a video. It can export to images. So, I think it must be doable, right ?
Also, if I just through a line of text in the command line, can I just use a subtitle codec to interpret the text and convert it to an image ?
I would love to make use of certain text styles, like Italic and text colors, stuff like that.
I thought, I will just ask here before I try for a week (like I am kinda doing now) without any luck :)
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Playing Mp3 file using FFmpeg on Android
2 avril 2017, par satyresThis question has been asked a lot but no code has worked for me . i’ve been able to play a file decoded with ffmpeg on Android but it’s noisy and glitchy.
i’ve found code in book called "linux sound programming" using latest ffmpeg version to decode an mp3 file.
the code tries to decode an mp3 file to pcm and then put it in a file called output.
what i want to do is to get the byte decoded on the fly and send them to AudioTrack in Java.void JNICALL Java_com_example_home_hellondk_MainActivity_loadFile
(JNIEnv* env, jobject obj,jstring file,jbyteArray array)
{
jboolean isfilenameCopy;
const char * filename = (*env)->GetStringUTFChars(env, file,
&isfilenameCopy);
jclass cls = (*env)->GetObjectClass(env, obj);
jmethodID play = (*env)->GetMethodID(env, cls, "playSound", "([BI)V");
AVCodec *codec;
AVCodecContext *c= NULL;
int len;
FILE *f, *outfile;
uint8_t inbuf[AUDIO_INBUF_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
AVPacket avpkt;
AVFrame *decoded_frame = NULL;
AVFormatContext* container=NULL;
av_init_packet(&avpkt);
int num_streams = 0;
int sample_size = 0;
printf("Decode audio file %s \n", filename);
LOGE("Decode audio file %s\n", filename);
/* find the MPEG audio decoder */
/* codec = avcodec_find_decoder(AV_CODEC_ID_MP3);
if (!codec) {
fprintf(stderr, "Codec not found\n");
LOGE("Codec not found\n");
exit(1);
}*/
int lError;
if ((lError = avformat_open_input(&container, filename, NULL, NULL))
!= 0) {
LOGE("Error open source file: %d", lError);
exit(1);
}
if ((lError = avformat_find_stream_info(container,NULL)) < 0) {
LOGE("Error find stream information: %d", lError);
exit(1);
}
LOGE("Stage 1.5");
LOGE("audio format: %s", container->iformat->name);
LOGE("audio bitrate: %llu", container->bit_rate);
int stream_id = -1;
// To find the first audio stream. This process may not be necessary
// if you can gurarantee that the container contains only the desired
// audio stream
LOGE("nb_streams: %d", container->nb_streams);
int i;
for (i = 0; i < container->nb_streams; i++) {
if (container->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
stream_id = i;
LOGE("stream_id: %d", stream_id);
break;
}
}
AVCodecContext* codec_context = container->streams[stream_id]->codec;
codec = avcodec_find_decoder(codec_context->codec_id);
LOGE("stream_id: %d", stream_id);
LOGE("codec %s", codec->name);
if (!codec) {
fprintf(stderr, "codec not found\n");
exit(1);
}
c = avcodec_alloc_context3(codec);
if (!c) {
fprintf(stderr, "Could not allocate audio codec context\n");
LOGE("Could not allocate audio codec context\n");
exit(1);
}
/* open it */
if (avcodec_open2(c, codec, NULL) < 0) {
fprintf(stderr, "Could not open codec\n");
LOGE("Could not open codec\n");
exit(1);
}
f = fopen(filename, "rb");
if (!f) {
fprintf(stderr, "Could not open %s\n", filename);
LOGE("Could not open %s\n",filename);
exit(1);
}
const char *outfilename;
outfile = fopen(outfilename, "wb");
if (!outfile) {
av_free(c);
exit(1);
}
avpkt.data = inbuf;
avpkt.size = fread(inbuf, 1, AUDIO_INBUF_SIZE, f);
LOGE("Stage 5");
/* decode until eof */
while (avpkt.size > 0) {
int got_frame = 0;
if (!decoded_frame) {
if (!(decoded_frame = av_frame_alloc())) {
fprintf(stderr, "out of memory\n");
exit(1);
}
} else {
av_frame_unref(decoded_frame);
}
printf("Stream idx %d\n", avpkt.stream_index);
len = avcodec_decode_audio4(c, decoded_frame, &got_frame, &avpkt);
if (len < 0) {
fprintf(stderr, "Error while decoding\n");
exit(1);
}
if (got_frame) {
printf("Decoded frame nb_samples %d, format %d\n",
decoded_frame->nb_samples,
decoded_frame->format);
if (decoded_frame->data[1] != NULL)
printf("Data[1] not null\n");
else
printf("Data[1] is null\n");
/* if a frame has been decoded, output it */
int data_size = av_samples_get_buffer_size(NULL, c->channels,
decoded_frame->nb_samples,
c->sample_fmt, 1);
// first time: count the number of planar streams
if (num_streams == 0) {
while (num_streams < AV_NUM_DATA_POINTERS &&
decoded_frame->data[num_streams] != NULL)
num_streams++;
printf("Number of streams %d\n", num_streams);
}
// first time: set sample_size from 0 to e.g 2 for 16-bit data
if (sample_size == 0) {
sample_size =
data_size / (num_streams * decoded_frame->nb_samples);
}
int m, n;
for (n = 0; n < decoded_frame->nb_samples; n++) {
// interleave the samples from the planar streams
for (m = 0; m < num_streams; m++) {
fwrite(&decoded_frame->data[m][n*sample_size],
1, sample_size, outfile);
}
}
/* jbyte *bytes = (*env)->GetByteArrayElements(env, array, NULL);
memcpy(bytes, decoded_frame->data[1], data_size);
(*env)->ReleaseByteArrayElements(env, array, bytes, 0);
(*env)->CallVoidMethod(env, obj, play, array, data_size);
*/
}
avpkt.size -= len;
avpkt.data += len;
if (avpkt.size < AUDIO_REFILL_THRESH) {
/* Refill the input buffer, to avoid trying to decode
* incomplete frames. Instead of this, one could also use
* a parser, or use a proper container format through
* libavformat. */
memmove(inbuf, avpkt.data, avpkt.size);
avpkt.data = inbuf;
len = fread(avpkt.data + avpkt.size, 1,
AUDIO_INBUF_SIZE - avpkt.size, f);
if (len > 0)
avpkt.size += len;
}
}
fclose(f);
avcodec_free_context(&c);
av_frame_free(&decoded_frame);
}the decoded bytes are in this section
fwrite(&decoded_frame->data[m][n*sample_size], 1, sample_size, outfile);the code that let you send bytes to java is this :
jbyte *bytes = (*env)->GetByteArrayElements(env, array, NULL);
memcpy(bytes, decoded_frame->data[0], data_size);
(*env)->ReleaseByteArrayElements(env, array, bytes, 0);
(*env)->CallVoidMethod(env, obj, play, array, data_size);i’ve been working on it now for more than a week and nothing worked for me.
Thank you in advance for your help
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Decoding an mp3 file using FFmpeg but sound is glitchy
28 avril 2017, par satyresAfter successfuly compiling the latest version of FFmpeg library and generated .a library in Ubuntu I’ve been struggling now for more than a week to play a simple mp3 file in Android without a success !
The sound on my S4 working but it’s glitchy and stuttering
I’ve followed this tutorial given by FFmpeg team in Github i’ve tried to use it in Android but no luck !
here is the Native code.void Java_com_example_home_hellondk_MainActivity_audio_1decode_1example(JNIEnv * env, jobject obj, jstring file, jbyteArray array) {
jboolean isfilenameCopy;
const char * filename = (*env)->GetStringUTFChars(env, file,
&isfilenameCopy);
jclass cls = (*env)->GetObjectClass(env, obj);
jmethodID play = (*env)->GetMethodID(env, cls, "playSound", "([BI)V");
AVCodec *codec;
AVCodecContext *c= NULL;
int len;
FILE *f, *outfile;
uint8_t inbuf[AUDIO_INBUF_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
AVPacket avpkt;
AVFrame *decoded_frame = NULL;
AVFormatContext* container=NULL;
av_init_packet(&avpkt);
printf("Decode audio file %s \n", filename);
LOGE("Decode audio file %s\n", filename);
/* find the MPEG audio decoder */
/* codec = avcodec_find_decoder(AV_CODEC_ID_MP3);
if (!codec) {
fprintf(stderr, "Codec not found\n");
LOGE("Codec not found\n");
exit(1);
}*/
int lError;
if ((lError = avformat_open_input(&container, filename, NULL, NULL))
!= 0) {
LOGE("Error open source file: %d", lError);
exit(1);
}
if ((lError = avformat_find_stream_info(container,NULL)) < 0) {
LOGE("Error find stream information: %d", lError);
exit(1);
}
LOGE("Stage 1.5");
LOGE("audio format: %s", container->iformat->name);
LOGE("audio bitrate: %llu", container->bit_rate);
int stream_id = -1;
// To find the first audio stream. This process may not be necessary
// if you can gurarantee that the container contains only the desired
// audio stream
LOGE("nb_streams: %d", container->nb_streams);
int i;
for (i = 0; i < container->nb_streams; i++) {
if (container->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
stream_id = i;
LOGE("stream_id: %d", stream_id);
break;
}
}
AVCodecContext* codec_context = container->streams[stream_id]->codec;
codec = avcodec_find_decoder(codec_context->codec_id);
LOGE("stream_id: %d", stream_id);
LOGE("codec %s", codec->name);
if (!codec) {
fprintf(stderr, "codec not found\n");
exit(1);
}
c = avcodec_alloc_context3(codec);
if (!c) {
fprintf(stderr, "Could not allocate audio codec context\n");
LOGE("Could not allocate audio codec context\n");
exit(1);
}
/* open it */
if (avcodec_open2(c, codec, NULL) < 0) {
fprintf(stderr, "Could not open codec\n");
LOGE("Could not open codec\n");
exit(1);
}
f = fopen(filename, "rb");
if (!f) {
fprintf(stderr, "Could not open %s\n", filename);
LOGE("Could not open %s\n",filename);
exit(1);
}
avpkt.data = inbuf;
avpkt.size = fread(inbuf, 1, AUDIO_INBUF_SIZE, f);
LOGE("Stage 5");
/* decode until eof */
while (1) {
if ((len = av_read_frame(container, &avpkt)) < 0)
break;
if (avpkt.stream_index == stream_id)
{
if (!decoded_frame) {
if (!(decoded_frame = av_frame_alloc())) {
fprintf(stderr, "Could not allocate audio frame\n");
LOGE("Could not allocate audio frame\n");
exit(1);
}
}
int got_frame = 0;
len = avcodec_decode_audio4(c, decoded_frame, &got_frame, &avpkt);
LOGE("len=%d",len);
if (len < 0)
{
LOGE("Error decoding audio\n");
continue;
}
if (got_frame)
{
LOGE("begin frame decode\n");
int data_size = av_samples_get_buffer_size(NULL, c->channels,decoded_frame->nb_samples,c->sample_fmt, 1);
if (data_size>0)
{
LOGE("after frame decode %d\n",data_size);
jbyte *bytes = (*env)->GetByteArrayElements(env, array, NULL);
memcpy(bytes, decoded_frame->data[0], data_size);
(*env)->ReleaseByteArrayElements(env, array, bytes, 0);
(*env)->CallVoidMethod(env, obj, play, array, data_size);
}
else
{
fprintf(stderr, "Failed to calculate data size\n");
exit(1);
}
}
avpkt.size -= len;
avpkt.data += len;
avpkt.pts = AV_NOPTS_VALUE;
if (avpkt.size < AUDIO_REFILL_THRESH)
{
memmove(inbuf, avpkt.data, avpkt.size);
avpkt.data = inbuf;
len = fread(avpkt.data + avpkt.size, 1, AUDIO_INBUF_SIZE - avpkt.size, f);
if (len > 0)
avpkt.size += len;
}
}
}
fclose(f);
avcodec_free_context(&c);
av_frame_free(&decoded_frame);
}The Java code :
package com.example.home.hellondk;
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioTrack;
import android.media.MediaPlayer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
static {
System.loadLibrary("MyLibraryPlayer");
}
public native void createEngine();
public native void audio_decode_example(String outfilename, byte[] array);
private AudioTrack track;
private FileOutputStream os;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
createEngine();
/* MediaPlayer mp = new MediaPlayer();
mp.start();*/
int bufSize = AudioTrack.getMinBufferSize(32000,
AudioFormat.CHANNEL_CONFIGURATION_STEREO,
AudioFormat.ENCODING_PCM_16BIT);
track = new AudioTrack(AudioManager.STREAM_MUSIC,
32000,
AudioFormat.CHANNEL_CONFIGURATION_STEREO,
AudioFormat.ENCODING_PCM_16BIT,
bufSize,
AudioTrack.MODE_STREAM);
byte[] bytes = new byte[bufSize];
audio_decode_example("/storage/emulated/0/test.mp3", bytes);
}
void playSound(byte[] buf, int size) {
//android.util.Log.v("ROHAUPT", "RAH Playing");
if (track.getPlayState() != AudioTrack.PLAYSTATE_PLAYING)
track.play();
track.write(buf, 0, size);
}
}Thank you so much for your help.
Kind regards
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