Recherche avancée
Médias (16)
-
#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
-
#5 End Title
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
-
#3 The Safest Place
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
-
#4 Emo Creates
15 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
-
#2 Typewriter Dance
15 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
Autres articles (52)
-
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.
-
Possibilité de déploiement en ferme
12 avril 2011, parMediaSPIP peut être installé comme une ferme, avec un seul "noyau" hébergé sur un serveur dédié et utilisé par une multitude de sites différents.
Cela permet, par exemple : de pouvoir partager les frais de mise en œuvre entre plusieurs projets / individus ; de pouvoir déployer rapidement une multitude de sites uniques ; d’éviter d’avoir à mettre l’ensemble des créations dans un fourre-tout numérique comme c’est le cas pour les grandes plate-formes tout public disséminées sur le (...)
Sur d’autres sites (4945)
-
ffmpeg unbale to initialize threading [closed]
16 octobre 2020, par Sudipta RoyI have a JAVA service running in wildfly which is calling an external ffmpeg binary to convert .au files to .wav files. The actual command that is being executed is as follows :


ffmpeg -y -i INPUT.au OUTPUT.wav


It is running smoothly, except every once in a while it is creating an empty .wav file becasue of the following error :


Error: ffmpeg version c6710aa Copyright (c) 2000-2017 the FFmpeg 
developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
configuration: --prefix=/tmp/ffmpeg-static/target --pkg-config-flags=- 
-static --extra-cflags=-I/tmp/ffmpeg-static/target/include --extra- 
ldflags=-L/tmp/ffmpeg-static/target/lib --extra-ldexeflags=-static -- 
bindir=/tmp/ffmpeg-static/bin --enable-pic --enable-ffplay --enable- 
ffserver --enable-fontconfig --enable-frei0r --enable-gpl --enable- 
version3 --enable-libass --enable-libfribidi --enable-libfdk-aac -- 
enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb -- 
enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus -- 
enable-librtmp --enable-libsoxr --enable-libspeex --enable-libtheora - 
-enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis -- 
enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 -- 
enable-libxvid --enable-libzimg --enable-nonfree --enable-openssl
libavutil 55. 34.101 / 55. 34.101
libavcodec 57. 64.101 / 57. 64.101
libavformat 57. 56.101 / 57. 56.101
libavdevice 57. 1.100 / 57. 1.100
libavfilter 6. 65.100 / 6. 65.100
libswscale 4. 2.100 / 4. 2.100
libswresample 2. 3.100 / 2. 3.100
libpostproc 54. 1.100 / 54. 1.100

Input #0, ogg, from 'INPUT.au'
Duration: 00:00:34.08, start: 0.01500, bitrate: 15kb/s
Stream: #0.0: Audio: speex, 8000Hz, mono, s16, 15kb/s

[AVFilterGraph @ 0x43ec6e0] Error initializing threading.
[AVFilterGraph @ 0x43ec6e0] Error creating filter 'anull'


If I try to manually convert the file from command line, it works. A brief internet search (this) shows that it might be due to the fact that
ffmpegis unable to create threads for internal use. Can anyone please elaborate ?

The server where I am facing the problem have relatively high load. I have seen that wildfly is creating close to 1800 threads.


Thanks


P.s. I have managed to recreate the problem. Below is the code :


SystemCommandExecutor.java


import java.io.*;
 import java.util.List;
 public class SystemCommandExecutor {
 private List<string> commandInformation;
 private String adminPassword;
 private ThreadedStreamHandler inputStreamHandler;
 private ThreadedStreamHandler errorStreamHandler;

 public SystemCommandExecutor(final List<string> commandInformation)
 {
 if (commandInformation==null) throw new NullPointerException("The commandInformation is required.");
 this.commandInformation = commandInformation;
 this.adminPassword = null;
 }

 public int executeCommand()
 throws IOException, InterruptedException
 {
 int exitValue = -99;

 try
 {
 ProcessBuilder pb = new ProcessBuilder(commandInformation);
 Process process = pb.start();
 OutputStream stdOutput = process.getOutputStream();
 InputStream inputStream = process.getInputStream();
 InputStream errorStream = process.getErrorStream();
 inputStreamHandler = new ThreadedStreamHandler(inputStream, stdOutput, adminPassword);
 errorStreamHandler = new ThreadedStreamHandler(errorStream);
 inputStreamHandler.start();
 errorStreamHandler.start();
 exitValue = process.waitFor();
 inputStreamHandler.interrupt();
 errorStreamHandler.interrupt();
 inputStreamHandler.join();
 errorStreamHandler.join();
 }
 catch (IOException e)
 {
 throw e;
 }
 catch (InterruptedException e)
 {
 throw e;
 }
 finally
 {
 return exitValue;
 }
 }

 public StringBuilder getStandardOutputFromCommand()
 {
 return inputStreamHandler.getOutputBuffer();
 }

 public StringBuilder getStandardErrorFromCommand()
 {
 return errorStreamHandler.getOutputBuffer();
 }
}
</string></string>

ThreadedStreamHandler.java


import java.io.*;

class ThreadedStreamHandler extends Thread
{
 InputStream inputStream;
 String adminPassword;
 OutputStream outputStream;
 PrintWriter printWriter;
 StringBuilder outputBuffer = new StringBuilder();
 private boolean sudoIsRequested = false;

 
 ThreadedStreamHandler(InputStream inputStream)
 {
 this.inputStream = inputStream;
 }

 
 ThreadedStreamHandler(InputStream inputStream, OutputStream outputStream, String adminPassword)
 {
 this.inputStream = inputStream;
 this.outputStream = outputStream;
 this.printWriter = new PrintWriter(outputStream);
 this.adminPassword = adminPassword;
 this.sudoIsRequested = true;
 }

 public void run()
 {
 
 if (sudoIsRequested)
 {
 printWriter.println(adminPassword);
 printWriter.flush();
 }

 BufferedReader bufferedReader = null;
 try
 {
 bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
 String line = null;
 while ((line = bufferedReader.readLine()) != null)
 {
 outputBuffer.append(line + "\n");
 }
 }
 catch (IOException ioe)
 {
 ioe.printStackTrace();
 }
 catch (Throwable t)
 {
 t.printStackTrace();
 }
 finally
 {
 try
 {
 bufferedReader.close();
 }
 catch (IOException e)
 {
 // ignore this one
 }
 }
 }

 private void doSleep(long millis)
 {
 try
 {
 Thread.sleep(millis);
 }
 catch (InterruptedException e)
 {
 // ignore
 }
 }

 public StringBuilder getOutputBuffer()
 {
 return outputBuffer;
 }

}


FfmpegRunnable.java


import java.io.IOException;
import java.util.List;

public class FfmpegRunnable implements Runnable {
 private List<string> command;
 SystemCommandExecutor executor;

 public FfmpegRunnable(List<string> command) {
 this.command = command;
 this.executor = new SystemCommandExecutor(command);
 }

 @Override
 public void run() {
 try {
 int id = (int) Thread.currentThread().getId();
 int result = executor.executeCommand();
 if(result != 0) {
 StringBuilder err = executor.getStandardErrorFromCommand();
 System.out.println("[" + id + "]" + "[ERROR] " + err);
 } else {
 System.out.println("[" + id + "]" + "[SUCCESS]");
 }
 } catch (IOException e) {
 e.printStackTrace();
 } catch (InterruptedException e) {
 e.printStackTrace();
 }
 }
}
</string></string>

FfmpegMain.java


import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadPoolExecutor;
public class FfmpegMain {
 public static void main(String[] args) {
 //boolean threading = false;
 System.out.println(args[0]);
 int nrThread = Integer.parseInt(args[0]);
 boolean threading = Boolean.parseBoolean(args[1]);
 System.out.println("nrThread : " + nrThread + ", threading : " + threading);
 if(threading) {
 System.out.println("ffmpeg threading enabled");
 } else {
 System.out.println("ffmpeg threading not enabled");
 }
 ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newFixedThreadPool(nrThread);
 for(int i=0; i cmd = new ArrayList<string>();
 String dest = "/tmp/OUTPUT/output_" + (Math.random()*1000) + ".wav";
 String cmdStr = "/tmp/FFMPEG/ffmpeg" + (threading ? " -threads 1 " : " ")
 + "-y -i /tmp/input.au " + dest;
 cmd.add("/bin/sh");
 cmd.add("-c");
 cmd.add(cmdStr);

 executor.submit(new FfmpegRunnable(cmd));
 }
 executor.shutdown();
 }
}
</string>

I have created a jar with the class files and run the jar from two seperate terminal with the following command


java -jar JAR.jar 40 true


Here 40 is the number of threads, simulating varous users accessing the system. Every once in a while I get above mentioned error.


-
FFMPEG RTSP stream to MPEG4/H264 file using libx264
16 octobre 2020, par PhiHeyo folks,



I'm attempting to transcode/remux an RTSP stream in H264 format into a MPEG4 container, containing just the H264 video stream. Basically, webcam output into a MP4 container.



I can get a poorly coded MP4 produced, using this code :



// Variables here for demo
AVFormatContext * video_file_output_format = nullptr;
AVFormatContext * rtsp_format_context = nullptr;
AVCodecContext * video_file_codec_context = nullptr;
AVCodecContext * rtsp_vidstream_codec_context = nullptr;
AVPacket packet = {0};
AVStream * video_file_stream = nullptr;
AVCodec * rtsp_decoder_codec = nullptr;
int errorNum = 0, video_stream_index = 0;
std::string outputMP4file = "D:\\somemp4file.mp4";

// begin
AVDictionary * opts = nullptr;
av_dict_set(&opts, "rtsp_transport", "tcp", 0);

if ((errorNum = avformat_open_input(&rtsp_format_context, uriANSI.c_str(), NULL, &opts)) < 0) {
 errOut << "Connection failed: avformat_open_input failed with error " << errorNum << ":\r\n" << ErrorRead(errorNum);
 TacticalAbort();
 return;
}

rtsp_format_context->max_analyze_duration = 50000;
if ((errorNum = avformat_find_stream_info(rtsp_format_context, NULL)) < 0) {
 errOut << "Connection failed: avformat_find_stream_info failed with error " << errorNum << ":\r\n" << ErrorRead(errorNum);
 TacticalAbort();
 return;
}

video_stream_index = errorNum = av_find_best_stream(rtsp_format_context, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);

if (video_stream_index < 0) {
 errOut << "Connection in unexpected state; made a connection, but there was no video stream.\r\n"
 "Attempts to find a video stream resulted in error " << errorNum << ": " << ErrorRead(errorNum);
 TacticalAbort();
 return;
}

rtsp_vidstream_codec_context = rtsp_format_context->streams[video_stream_index]->codec;

av_init_packet(&packet);

if (!(video_file_output_format = av_guess_format(NULL, outputMP4file.c_str(), NULL))) {
 TacticalAbort();
 throw std::exception("av_guess_format");
}

if (!(rtsp_decoder_codec = avcodec_find_decoder(rtsp_vidstream_codec_context->codec_id))) {
 errOut << "Connection failed: connected, but avcodec_find_decoder returned null.\r\n"
 "Couldn't find codec with an AV_CODEC_ID value of " << rtsp_vidstream_codec_context->codec_id << ".";
 TacticalAbort();
 return;
}

video_file_format_context = avformat_alloc_context();
video_file_format_context->oformat = video_file_output_format;

if (strcpy_s(video_file_format_context->filename, sizeof(video_file_format_context->filename), outputMP4file.c_str())) {
 errOut << "Couldn't open video file: strcpy_s failed with error " << errno << ".";
 std::string log = errOut.str();
 TacticalAbort();
 throw std::exception("strcpy_s");
}

if (!(video_file_encoder_codec = avcodec_find_encoder(video_file_output_format->video_codec))) {
 TacticalAbort();
 throw std::exception("avcodec_find_encoder");
}

// MARKER ONE

if (!outputMP4file.empty() &&
 !(video_file_output_format->flags & AVFMT_NOFILE) &&
 (errorNum = avio_open2(&video_file_format_context->pb, outputMP4file.c_str(), AVIO_FLAG_WRITE, nullptr, &opts)) < 0) {
 errOut << "Couldn't open video file \"" << outputMP4file << "\" for writing : avio_open2 failed with error " << errorNum << ": " << ErrorRead(errorNum);
 TacticalAbort();
 return;
}

// Create stream in MP4 file
if (!(video_file_stream = avformat_new_stream(video_file_format_context, video_file_encoder_codec))) {
 TacticalAbort();
 return;
}

AVCodecContext * video_file_codec_context = video_file_stream->codec;

// MARKER TWO

// error -22/-21 in avio_open2 if this is skipped
if ((errorNum = avcodec_copy_context(video_file_codec_context, rtsp_vidstream_codec_context)) != 0) {
 TacticalAbort();
 throw std::exception("avcodec_copy_context");
}

//video_file_codec_context->codec_tag = 0;

/*
// MARKER 3 - is this not needed? Examples suggest not.
if ((errorNum = avcodec_open2(video_file_codec_context, video_file_encoder_codec, &opts)) < 0)
{
 errOut << "Couldn't open video file codec context: avcodec_open2 failed with error " << errorNum << ": " << ErrorRead(errorNum);
 std::string log = errOut.str();
 TacticalAbort();
 throw std::exception("avcodec_open2, video file");
}*/

//video_file_format_context->flags |= AVFMT_FLAG_GENPTS;
if (video_file_format_context->oformat->flags & AVFMT_GLOBALHEADER)
{
 video_file_codec_context->flags |= CODEC_FLAG_GLOBAL_HEADER;
}

if ((errorNum = avformat_write_header(video_file_format_context, &opts)) < 0) {
 errOut << "Couldn't open video file: avformat_write_header failed with error " << errorNum << ":\r\n" << ErrorRead(errorNum);
 std::string log = errOut.str();
 TacticalAbort();
 return;
}



However, there are several issues :



- 

- I can't pass any x264 options to the output file. The output H264 matches the input H264's profile/level - switching cameras to a different model switches H264 level.
- The timing of the output file is off, noticeably.
- The duration of the output file is off, massively. A few seconds of footage becomes hours, although playtime doesn't match. (FWIW, I'm using VLC to play them.)









Passing x264 options



If I manually increment PTS per packet, and set DTS equal to PTS, it plays too fast, 2-3 seconds' worth of footage in one second playtime, and duration is hours long. The footage also blurs past several seconds, about 10 seconds' footage in a second.



If I let FFMPEG decide (with or without GENPTS flag), the file has a variable frame rate (probably as expected), but it plays the whole file in an instant and has a long duration too (over forty hours for a few seconds). The duration isn't "real", as the file plays in an instant.



At Marker One, I try to set the profile by passing options to
avio_open2. The options are simply ignored by libx264. I've tried :


av_dict_set(&opts, "vprofile", "main", 0);
av_dict_set(&opts, "profile", "main", 0); // error, missing '('
// FF_PROFILE_H264_MAIN equals 77, so I also tried
av_dict_set(&opts, "vprofile", "77", 0); 
av_dict_set(&opts, "profile", "77", 0);



It does seem to read the profile setting, but it doesn't use them. At Marker Two, I tried to set it after the
avio_open2, beforeavformat_write_header.


// I tried all 4 av_dict_set from earlier, passing it to avformat_write_header.
// None had any effect, they weren't consumed.
av_opt_set(video_file_codec_context, "profile", "77", 0);
av_opt_set(video_file_codec_context, "profile", "main", 0);
video_file_codec_context->profile = FF_PROFILE_H264_MAIN;
av_opt_set(video_file_codec_context->priv_data, "profile", "77", 0);
av_opt_set(video_file_codec_context->priv_data, "profile", "main", 0);



Messing with privdata made the program unstable, but I was trying anything at that point.
I'd like to solve issue 1 with passing settings, since I imagine it'd bottleneck any attempt to solve issues 2 or 3.



I've been fiddling with this for the better part of a month now. I've been through dozens of documentation, Q&As, examples. It doesn't help that quite a few are outdated.



Any help would be appreciated.



Cheers


-
Segfault after 15 seconds while reading a RTSP stream with ffmpeg in Android
27 juillet 2013, par ABentSpoonI'm trying to read a RTSP stream using ffmpeg by way of javacv. I'm able to view the fist 15 seconds or so before I get a segfault on the call to sws_scale. Does this mean I've ran out of memory ? If so, any idea what I'm doing wrong ?
av_register_all();
avcodec.avcodec_register_all();
avformat_network_init();
AVFormatContext avFormatContext = avformat.avformat_alloc_context();
if(0 != avformat_open_input(avFormatContext, "rtsp://192.168.0.107:7654/lov2.ffm", null, null)){
throw new RuntimeException("avformat_open_input failed");
}
if(avformat_find_stream_info(avFormatContext, null) < 0){
throw new RuntimeException("avformat_find_stream_info failed");
}
int video_stream_index = 0;
//search video stream
for(int i = 0; i < avFormatContext.nb_streams(); i++){
if(avFormatContext.streams(i).codec().codec_type() == AVMEDIA_TYPE_VIDEO){
video_stream_index = i;
}
}
Log.d(TAG, "checkpoint 3");
AVPacket packet = new AVPacket();
av_init_packet(packet);
AVStream stream = new AVStream();
int cnt = 0;
//start reading packets from stream and write them to file
av_read_play(avFormatContext);//play RTSP
AVCodecContext avCodecContext = avFormatContext.streams(video_stream_index).codec();
AVCodec codec = avcodec_find_decoder(avCodecContext.codec_id());
if (codec == null){
throw new RuntimeException("codec not found");
}
if (avcodec_open2(avCodecContext, codec, null) < 0){
throw new RuntimeException("could not open codec");
}
SwsContext img_convert_ctx = new SwsContext();
img_convert_ctx = swscale.sws_getCachedContext(
img_convert_ctx,
avCodecContext.width(), avCodecContext.height(),
avCodecContext.pix_fmt(), avCodecContext.width(), avCodecContext.height(),
PIX_FMT_RGB24, SWS_BICUBIC, null, null, null
);
int size = avpicture_get_size(PIX_FMT_YUV420P, avCodecContext.width(), avCodecContext.height());
BytePointer picture_buf = new BytePointer(av_malloc(size));
AVFrame frame = avcodec_alloc_frame();
AVFrame picrgb = avcodec_alloc_frame();
int size2 = avpicture_get_size(avutil.PIX_FMT_RGB24, avCodecContext.width(), avCodecContext.height());
BytePointer picture_buf2 = new BytePointer(av_malloc(size2));
avpicture_fill(frame, picture_buf, PIX_FMT_YUV420P, avCodecContext.width(), avCodecContext.height());
avpicture_fill(picrgb, picture_buf2, avutil.PIX_FMT_RGB24, avCodecContext.width(), avCodecContext.height());
Log.d(TAG, String.format("h: %d, w: %d; h: %d w: %d", avCodecContext.width(), avCodecContext.height(), avCodecContext.height(), frame.width()));
Log.d(TAG, "checkpoint 6");
Bitmap bmp = Bitmap.createBitmap(avCodecContext.width(), avCodecContext.height(), Bitmap.Config.RGB_565);
while(av_read_frame(avFormatContext, packet) >= 0){
if(packet.size() > 0 && packet.stream_index() == video_stream_index){//packet is video
int[] gotFrame = new int[]{0};
int len = avcodec_decode_video2(avCodecContext, frame, gotFrame, packet);
if(gotFrame[0] > 0){
swscale.sws_scale(
img_convert_ctx,
frame.data(0), frame.linesize(),
0, avCodecContext.height(),
picrgb.data(0), picrgb.linesize());
bmp.copyPixelsFromBuffer(picture_buf2.asByteBuffer());
videoView.drawFrame(bmp);
}
}
av_free_packet(packet);
av_init_packet(packet);
}
av_free(frame);
av_free(picrgb);
av_free(picture_buf);
av_free(picture_buf2);
av_read_pause(avFormatContext);Stack trace :
F/libc ( 7460): Fatal signal 11 (SIGSEGV) at 0x76100005 (code=1), thread 7474 (Thread-13601)
E/Sensors ( 720): accelHandler 0.201182 0.180824 10.950029
I/DEBUG ( 6409): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
I/DEBUG ( 6409): Build fingerprint: 'Verizon/d2vzw/d2vzw:4.1.2/JZO54K/I535VRBMB1:user/release-keys'
I/DEBUG ( 6409): pid: 7460, tid: 7474, name: Thread-13601 >>> com.example.javacv.stream.test2 <<<
I/DEBUG ( 6409): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 76100005
I/DEBUG ( 6409): r0 57995360 r1 594f3c30 r2 59349200 r3 59349020
I/DEBUG ( 6409): r4 59349020 r5 76100005 r6 00000060 r7 594f3cf0
I/DEBUG ( 6409): r8 59349200 r9 59349020 sl 000001e0 fp 76100005
I/DEBUG ( 6409): ip 594f3cf0 sp 5e08bb08 lr 59308bec pc 593103b8 cpsr 00000010FAQ :
- Why not use MediaPlayer ?
MediaPlayer forces 2 seconds of latency on the stream, I really need <100ms.
Syndiquer tout le site
