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La file d’attente de SPIPmotion
28 novembre 2010, parUne file d’attente stockée dans la base de donnée
Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...) -
Les vidéos
21 avril 2011, parComme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...) -
Websites made with MediaSPIP
2 mai 2011, parThis page lists some websites based on MediaSPIP.
Sur d’autres sites (6502)
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How to play raw h264 produced by MediaCodec encoder ?
1er novembre 2014, par jackos2500I’m a bit new when it comes to MediaCodec (and video encoding/decoding in general), so correct me if anything I say here is wrong.
I want to play the raw h264 output of MediaCodec with VLC/ffplay. I need this to play becuase my end goal is to stream some live video to a computer, and MediaMuxer only produces a file on disk rather than something I can stream with (very) low latency to a desktop. (I’m open to other solutions, but I have not found anything else that fits the latency requirement)
Here is the code I’m using encode the video and write it to a file : (it’s based off the MediaCodec example found here, only with the MediaMuxer part removed)
package com.jackos2500.droidtop;
import android.media.MediaCodec;
import android.media.MediaCodecInfo;
import android.media.MediaFormat;
import android.opengl.EGL14;
import android.opengl.EGLConfig;
import android.opengl.EGLContext;
import android.opengl.EGLDisplay;
import android.opengl.EGLExt;
import android.opengl.EGLSurface;
import android.opengl.GLES20;
import android.os.Environment;
import android.util.Log;
import android.view.Surface;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
public class StreamH264 {
private static final String TAG = "StreamH264";
private static final boolean VERBOSE = true; // lots of logging
// where to put the output file (note: /sdcard requires WRITE_EXTERNAL_STORAGE permission)
private static final File OUTPUT_DIR = Environment.getExternalStorageDirectory();
public static int MEGABIT = 1000 * 1000;
private static final int IFRAME_INTERVAL = 10;
private static final int TEST_R0 = 0;
private static final int TEST_G0 = 136;
private static final int TEST_B0 = 0;
private static final int TEST_R1 = 236;
private static final int TEST_G1 = 50;
private static final int TEST_B1 = 186;
private MediaCodec codec;
private CodecInputSurface inputSurface;
private BufferedOutputStream out;
private MediaCodec.BufferInfo bufferInfo;
public StreamH264() {
}
private void prepareEncoder() throws IOException {
bufferInfo = new MediaCodec.BufferInfo();
MediaFormat format = MediaFormat.createVideoFormat("video/avc", 1280, 720);
format.setInteger(MediaFormat.KEY_BIT_RATE, 2 * MEGABIT);
format.setInteger(MediaFormat.KEY_FRAME_RATE, 30);
format.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);
format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, IFRAME_INTERVAL);
codec = MediaCodec.createEncoderByType("video/avc");
codec.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
inputSurface = new CodecInputSurface(codec.createInputSurface());
codec.start();
File dst = new File(OUTPUT_DIR, "test.264");
out = new BufferedOutputStream(new FileOutputStream(dst));
}
private void releaseEncoder() throws IOException {
if (VERBOSE) Log.d(TAG, "releasing encoder objects");
if (codec != null) {
codec.stop();
codec.release();
codec = null;
}
if (inputSurface != null) {
inputSurface.release();
inputSurface = null;
}
if (out != null) {
out.flush();
out.close();
out = null;
}
}
public void stream() throws IOException {
try {
prepareEncoder();
inputSurface.makeCurrent();
for (int i = 0; i < (30 * 5); i++) {
// Feed any pending encoder output into the file.
drainEncoder(false);
// Generate a new frame of input.
generateSurfaceFrame(i);
inputSurface.setPresentationTime(computePresentationTimeNsec(i, 30));
// Submit it to the encoder. The eglSwapBuffers call will block if the input
// is full, which would be bad if it stayed full until we dequeued an output
// buffer (which we can't do, since we're stuck here). So long as we fully drain
// the encoder before supplying additional input, the system guarantees that we
// can supply another frame without blocking.
if (VERBOSE) Log.d(TAG, "sending frame " + i + " to encoder");
inputSurface.swapBuffers();
}
// send end-of-stream to encoder, and drain remaining output
drainEncoder(true);
} finally {
// release encoder, muxer, and input Surface
releaseEncoder();
}
}
private void drainEncoder(boolean endOfStream) throws IOException {
final int TIMEOUT_USEC = 10000;
if (VERBOSE) Log.d(TAG, "drainEncoder(" + endOfStream + ")");
if (endOfStream) {
if (VERBOSE) Log.d(TAG, "sending EOS to encoder");
codec.signalEndOfInputStream();
}
ByteBuffer[] outputBuffers = codec.getOutputBuffers();
while (true) {
int encoderStatus = codec.dequeueOutputBuffer(bufferInfo, TIMEOUT_USEC);
if (encoderStatus == MediaCodec.INFO_TRY_AGAIN_LATER) {
// no output available yet
if (!endOfStream) {
break; // out of while
} else {
if (VERBOSE) Log.d(TAG, "no output available, spinning to await EOS");
}
} else if (encoderStatus == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) {
// not expected for an encoder
outputBuffers = codec.getOutputBuffers();
} else if (encoderStatus == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
// should happen before receiving buffers, and should only happen once
MediaFormat newFormat = codec.getOutputFormat();
Log.d(TAG, "encoder output format changed: " + newFormat);
} else if (encoderStatus < 0) {
Log.w(TAG, "unexpected result from encoder.dequeueOutputBuffer: " + encoderStatus);
// let's ignore it
} else {
ByteBuffer encodedData = outputBuffers[encoderStatus];
if (encodedData == null) {
throw new RuntimeException("encoderOutputBuffer " + encoderStatus + " was null");
}
if ((bufferInfo.flags & MediaCodec.BUFFER_FLAG_CODEC_CONFIG) != 0) {
// The codec config data was pulled out and fed to the muxer when we got
// the INFO_OUTPUT_FORMAT_CHANGED status. Ignore it.
if (VERBOSE) Log.d(TAG, "ignoring BUFFER_FLAG_CODEC_CONFIG");
bufferInfo.size = 0;
}
if (bufferInfo.size != 0) {
// adjust the ByteBuffer values to match BufferInfo (not needed?)
encodedData.position(bufferInfo.offset);
encodedData.limit(bufferInfo.offset + bufferInfo.size);
byte[] data = new byte[bufferInfo.size];
encodedData.get(data);
out.write(data);
if (VERBOSE) Log.d(TAG, "sent " + bufferInfo.size + " bytes to file");
}
codec.releaseOutputBuffer(encoderStatus, false);
if ((bufferInfo.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) {
if (!endOfStream) {
Log.w(TAG, "reached end of stream unexpectedly");
} else {
if (VERBOSE) Log.d(TAG, "end of stream reached");
}
break; // out of while
}
}
}
}
private void generateSurfaceFrame(int frameIndex) {
frameIndex %= 8;
int startX, startY;
if (frameIndex < 4) {
// (0,0) is bottom-left in GL
startX = frameIndex * (1280 / 4);
startY = 720 / 2;
} else {
startX = (7 - frameIndex) * (1280 / 4);
startY = 0;
}
GLES20.glClearColor(TEST_R0 / 255.0f, TEST_G0 / 255.0f, TEST_B0 / 255.0f, 1.0f);
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
GLES20.glEnable(GLES20.GL_SCISSOR_TEST);
GLES20.glScissor(startX, startY, 1280 / 4, 720 / 2);
GLES20.glClearColor(TEST_R1 / 255.0f, TEST_G1 / 255.0f, TEST_B1 / 255.0f, 1.0f);
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
GLES20.glDisable(GLES20.GL_SCISSOR_TEST);
}
private static long computePresentationTimeNsec(int frameIndex, int frameRate) {
final long ONE_BILLION = 1000000000;
return frameIndex * ONE_BILLION / frameRate;
}
/**
* Holds state associated with a Surface used for MediaCodec encoder input.
* <p>
* The constructor takes a Surface obtained from MediaCodec.createInputSurface(), and uses that
* to create an EGL window surface. Calls to eglSwapBuffers() cause a frame of data to be sent
* to the video encoder.
* </p><p>
* This object owns the Surface -- releasing this will release the Surface too.
*/
private static class CodecInputSurface {
private static final int EGL_RECORDABLE_ANDROID = 0x3142;
private EGLDisplay mEGLDisplay = EGL14.EGL_NO_DISPLAY;
private EGLContext mEGLContext = EGL14.EGL_NO_CONTEXT;
private EGLSurface mEGLSurface = EGL14.EGL_NO_SURFACE;
private Surface mSurface;
/**
* Creates a CodecInputSurface from a Surface.
*/
public CodecInputSurface(Surface surface) {
if (surface == null) {
throw new NullPointerException();
}
mSurface = surface;
eglSetup();
}
/**
* Prepares EGL. We want a GLES 2.0 context and a surface that supports recording.
*/
private void eglSetup() {
mEGLDisplay = EGL14.eglGetDisplay(EGL14.EGL_DEFAULT_DISPLAY);
if (mEGLDisplay == EGL14.EGL_NO_DISPLAY) {
throw new RuntimeException("unable to get EGL14 display");
}
int[] version = new int[2];
if (!EGL14.eglInitialize(mEGLDisplay, version, 0, version, 1)) {
throw new RuntimeException("unable to initialize EGL14");
}
// Configure EGL for recording and OpenGL ES 2.0.
int[] attribList = {
EGL14.EGL_RED_SIZE, 8,
EGL14.EGL_GREEN_SIZE, 8,
EGL14.EGL_BLUE_SIZE, 8,
EGL14.EGL_ALPHA_SIZE, 8,
EGL14.EGL_RENDERABLE_TYPE, EGL14.EGL_OPENGL_ES2_BIT,
EGL_RECORDABLE_ANDROID, 1,
EGL14.EGL_NONE
};
EGLConfig[] configs = new EGLConfig[1];
int[] numConfigs = new int[1];
EGL14.eglChooseConfig(mEGLDisplay, attribList, 0, configs, 0, configs.length,
numConfigs, 0);
checkEglError("eglCreateContext RGB888+recordable ES2");
// Configure context for OpenGL ES 2.0.
int[] attrib_list = {
EGL14.EGL_CONTEXT_CLIENT_VERSION, 2,
EGL14.EGL_NONE
};
mEGLContext = EGL14.eglCreateContext(mEGLDisplay, configs[0], EGL14.EGL_NO_CONTEXT,
attrib_list, 0);
checkEglError("eglCreateContext");
// Create a window surface, and attach it to the Surface we received.
int[] surfaceAttribs = {
EGL14.EGL_NONE
};
mEGLSurface = EGL14.eglCreateWindowSurface(mEGLDisplay, configs[0], mSurface,
surfaceAttribs, 0);
checkEglError("eglCreateWindowSurface");
}
/**
* Discards all resources held by this class, notably the EGL context. Also releases the
* Surface that was passed to our constructor.
*/
public void release() {
if (mEGLDisplay != EGL14.EGL_NO_DISPLAY) {
EGL14.eglMakeCurrent(mEGLDisplay, EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_SURFACE,
EGL14.EGL_NO_CONTEXT);
EGL14.eglDestroySurface(mEGLDisplay, mEGLSurface);
EGL14.eglDestroyContext(mEGLDisplay, mEGLContext);
EGL14.eglReleaseThread();
EGL14.eglTerminate(mEGLDisplay);
}
mSurface.release();
mEGLDisplay = EGL14.EGL_NO_DISPLAY;
mEGLContext = EGL14.EGL_NO_CONTEXT;
mEGLSurface = EGL14.EGL_NO_SURFACE;
mSurface = null;
}
/**
* Makes our EGL context and surface current.
*/
public void makeCurrent() {
EGL14.eglMakeCurrent(mEGLDisplay, mEGLSurface, mEGLSurface, mEGLContext);
checkEglError("eglMakeCurrent");
}
/**
* Calls eglSwapBuffers. Use this to "publish" the current frame.
*/
public boolean swapBuffers() {
boolean result = EGL14.eglSwapBuffers(mEGLDisplay, mEGLSurface);
checkEglError("eglSwapBuffers");
return result;
}
/**
* Sends the presentation time stamp to EGL. Time is expressed in nanoseconds.
*/
public void setPresentationTime(long nsecs) {
EGLExt.eglPresentationTimeANDROID(mEGLDisplay, mEGLSurface, nsecs);
checkEglError("eglPresentationTimeANDROID");
}
/**
* Checks for EGL errors. Throws an exception if one is found.
*/
private void checkEglError(String msg) {
int error;
if ((error = EGL14.eglGetError()) != EGL14.EGL_SUCCESS) {
throw new RuntimeException(msg + ": EGL error: 0x" + Integer.toHexString(error));
}
}
}
}
</p>However, the file produced from this code does not play with VLC or ffplay. Can anyone tell me what I’m doing wrong ? I believe it is due to an incorrect format (or total lack) of headers required for the playing of raw h264, as I have had success playing .264 files downloaded from the internet with ffplay. Also, I’m not sure exactly how I’m going to stream this video to a computer, so if somebody could give me some suggestions as to how I might do that, I would be very grateful ! Thanks !
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Get Proper Progress Updates on Two Long Waited Concurrent Processes in ASP.NET
17 juillet 2012, par irfanmcsdI implemented background video processing using .net ffmpeg wrapper http://www.mediasoftpro.com with progress bar indication to calculate how much video is processed and send information to web page to update progress bar indicator. Its working fine if only single process works at a time, but in case of two concurrent processes (start two video publishing at once let say from two different computers), progress bar suddenly mixed progress status.
Here is my code where i used static objects to properly send information of single instance to progress bar.static string FileName = "grey_03";
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
if (Request.Params["file"] != null)
{
FileName = Request.Params["file"].ToString();
}
}
}
public static double ProgressValue = 0;
public static MediaHandler _mhandler = new MediaHandler();
[WebMethod]
public static string EncodeVideo()
{
// MediaHandler _mhandler = new MediaHandler();
string RootPath = HttpContext.Current.Server.MapPath(HttpContext.Current.Request.ApplicationPath);
_mhandler.FFMPEGPath = HttpContext.Current.Server.MapPath("~\\ffmpeg_july_2012\\bin\\ffmpeg.exe");
_mhandler.InputPath = RootPath + "\\contents\\original";
_mhandler.OutputPath = RootPath + "\\contents\\mp4";
_mhandler.BackgroundProcessing = true;
_mhandler.FileName = "Grey.avi";
_mhandler.OutputFileName =FileName;
string presetpath = RootPath + "\\ffmpeg_july_2012\\presets\\libx264-ipod640.ffpreset";
_mhandler.Parameters = " -b:a 192k -b:v 500k -fpre \"" + presetpath + "\"";
_mhandler.OutputExtension = ".mp4";
_mhandler.VCodec = "libx264";
_mhandler.ACodec = "libvo_aacenc";
_mhandler.Channel = 2;
_mhandler.ProcessMedia();
return _mhandler.vinfo.ErrorCode.ToString();
}
[WebMethod]
public static string GetProgressStatus()
{
return Math.Round(_mhandler.vinfo.ProcessingCompleted, 2).ToString();
// if vinfo.processingcomplete==100, then you can get complete information from vinfo object and store it in database and perform other processing.
}Here is jquery functions responsible for updating progress bar indication after every second etc.
$(function () {
$("#vprocess").on({
click: function (e) {
ProcessEncoding();
var IntervalID = setInterval(function () {
GetProgressValue(IntervalID);
}, 1000);
return false;
}
}, '#btn_process');
});
function GetProgressValue(intervalid) {
$.ajax({
type: "POST",
url: "concurrent_03.aspx/GetProgressStatus",
data: "{}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (msg) {
// Do something interesting here.
$("#pstats").text(msg.d);
$("#pbar_int_01").attr('style', 'width: ' + msg.d + '%;');
if (msg.d == "100") {
$('#pbar01').removeClass("progress-danger");
$('#pbar01').addClass("progress-success");
if (intervalid != 0) {
clearInterval(intervalid);
}
FetchInfo();
}
}
});
}The problem arises due to static mediahandler object
public static MediaHandler _mhandler = new MediaHandler();I need a way to keep two concurrent processes information separate from each other in order to update progress bar with value exactly belong to that process.
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how to make live streaming for multiple clients
19 septembre 2014, par Abdulrahman AlcharbajiI have new project to do and I need some help to know where to start.
I have more than 1000 DVR each with 4 channels, I need to be able to do live streaming for multiple clients, and clients could be android,iPhone or windows.
Now throw searching i tried to check ffserver and ffmpeg but i couldn’t find much references to guide me throw a solution for my problem.
NOTE : the DVRs streaming with h.264 encoding.So Please can anybody help me by guiding me for a start or some good references about this particular issue.
Many Thnaks
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