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• Apostrophe issue with FFmpeg

  1er mars 2024, par Rohan Molinillo

  I'm working on a company's project which is vue.js.
There are also code parts in php.
It uses FFmpeg to create a video from multiple videos.
On each video, there is a text type subtitle.
Each text is retrieved from a .txt file
But I have a problem with apostrophes.

  


  If in the subtitle is stored like this ( I'm here ) in the txt file, on the video there will be written ( Im ).
The apostrophe is removed and the rest of the text too ( here ) will not be displayed.

  


  I'm new to php and ffmpeg, I've been on this problem for almost 3 weeks.

  


  I share the php code with you.

  


  <?php

declare(strict_types=1);

array_shift($argv); // remove script name in $argv[0]

$parameters = array_reduce($argv, function ($carry, $arg) {
    $tokens = explode('=', $arg);
    $carry[$tokens[0]] = $tokens[1];
    return $carry;
}, []);

$projectPath = $parameters['projectPath'];
$musicPath = $parameters['musicPath'];

$fontPath = getcwd() . "/public/fonts/cobol/Cobol-Bold.ttf";
$logoPath = getcwd() . "/public/images/saintex.jpg";
$carnetLogoPath = getcwd() . "/public/images/CarnetTitre.jpg";

// Adding descriptions for each clip and fade in and fade out filters
$clipsToDescribe =  glob("$projectPath/*.webm");
$clipFrameRate = (int) shell_exec("cd $projectPath && ffprobe -v error -select_streams v -of default=noprint_wrappers=1:nokey=1 -show_entries stream=r_frame_rate $clipsToDescribe[0]");
$clipFrameRate = $clipFrameRate > 60 ? 30 : $clipFrameRate;

foreach ($clipsToDescribe as $key => $clipToDescribe) {
    $clipIndex = $key + 1;
    $clipFrames = (int) shell_exec("cd $projectPath && ffprobe -v error -select_streams v:0 -count_packets -show_entries stream=nb_read_packets -of csv=p=0 $clipToDescribe");
    $clipDuration = (float) ($clipFrames / $clipFrameRate) - 0.5;
    file_put_contents("$projectPath/clip{$clipIndex}_desc.txt", addslashes($parameters["clip{$clipIndex}_desc"]));
    shell_exec("cd $projectPath && ffmpeg -i $clipToDescribe -vf 'drawtext=fontfile=$fontPath: textfile=clip{$clipIndex}_desc.txt: fontcolor=white: fontsize=46: box=1: boxcolor=black@0.5: boxborderw=5: x=(w-text_w)/2: y=(h-text_h-50): fix_bounds=true, fade=t=in:st=0:d=0.3,fade=t=out:st=$clipDuration:d=0.3' -b:v 3000K -b:a 192K clip{$clipIndex}.webm");
}
array_map('unlink', glob("$projectPath/*desc.txt"));

shell_exec("cd $projectPath && ffmpeg -t 2 -f lavfi -i color=c=black:s=1280x720 -r 30 blank.webm");
shell_exec("cd $projectPath && ffmpeg -i blank.webm -i $carnetLogoPath -filter_complex '[0:v][1:v] overlay=(main_w/2)-(overlay_w/2):(main_h/2)-(overlay_h/2)' -pix_fmt yuv420p -c:a copy logo.webm");



$workshop = $parameters["workshop_type"];
$title = $parameters["title"];
shell_exec("cd $projectPath && ffmpeg -f lavfi -i color=size=1280x720:duration=3:rate=30:color=black -vf 'drawtext=text=$workshop:fontfile=$fontPath:fontcolor=white:fontsize=46:x=(w-text_w)/2:y=(h-text_h)/2, drawtext=text=$title:fontfile=$fontPath:fontcolor=white:fontsize=46:x=(w-text_w)/2:y=((h-text_h)/2)+lh+5' opening.webm");
unlink("$projectPath/blank.webm");

$videosFile = "file 'logo.webm'\n";
$videosFile .= "file 'opening.webm'\n";{
    file_put_contents("$projectPath/project_desc.txt", $parameters["project_desc"]);
    shell_exec("cd $projectPath && ffmpeg -f lavfi -i color=size=1280x720:duration=3:rate=30:color=black -vf 'drawtext=fontfile=$fontPath:fontsize=46:fontcolor=white:x=(w-text_w)/2:y=(h-text_h)/2:textfile=project_desc.txt' project_desc.webm");
    unlink("$projectPath/project_desc.txt");
    $videosFile .= "file 'project_desc.webm'\n";
} 
if(array_key_exists("participants", $parameters)) {
    file_put_contents("$projectPath/participants.txt", "Participants :\n" . $parameters["participants"]);
    shell_exec("cd $projectPath && ffmpeg -f lavfi -i color=size=1280x720:duration=2:rate=30:color=black -vf 'drawtext=fontfile=$fontPath:fontsize=46:fontcolor=white:x=(w-text_w)/2:y=(h-text_h)/2:textfile=participants.txt' participants.webm");
    unlink("$projectPath/participants.txt");
}

$videos =  glob("$projectPath/clip*.webm");
foreach($videos as $video) {
    if($video != "originalVideos") {
        $videosFile .= "file ". "'{$video}'\n";
    }
} 
if(array_key_exists("participants", $parameters)) {
    $videosFile .= "file '$projectPath/participants.webm'";
}
array_map('unlink', glob("$projectPath/*webm.txt"));
file_put_contents("$projectPath/videosFile.txt", $videosFile);
if($musicPath == "/_musics/") {
    echo(shell_exec("cd $projectPath && ffmpeg -f concat -safe 0 -i videosFile.txt -b:v 10000K -crf 20 -b:a 192K output.webm"));
} else {
    echo(shell_exec("cd $projectPath && ffmpeg -f concat -safe 0 -i videosFile.txt -b:v 10000K -crf 20 -b:a 192K assembled.webm && ffmpeg -i assembled.webm -i ../..$musicPath -filter_complex ' [1:0] apad ' -shortest -y -b:v 3000K -b:a 192K output.webm"));
}


  


  I tried many things but each time there were errors.
I think I didn't implement the code properly.

  


  I share you the error

  


          [09:21:02] RECEIVED EVENT: videoRequest
{ Error: Command failed: php ./public/src/generate.php projectPath='/home/rohan/Documents/dodoc2/_projects/its-a-test' musicPath='/_musics/classic.mp3' clip1_name='' clip2_name='' clip3_name='' clip4_name='' clip5_name='' clip1_desc='It's a first test' clip2_desc='It's a second test' clip3_desc='It's a third test' clip4_desc='It's a fourth' clip5_desc='It's a last test' project_desc='' workshop_type='Atelier Robotique' title='It's a test' participants='Molinillo Rohan
'
PHP Warning:  Undefined array key 1 in /home/rohan/carnet-numerique/public/src/generate.php on line 9
PHP Warning:  Undefined array key 1 in /home/rohan/carnet-numerique/public/src/generate.php on line 9
PHP Warning:  Undefined array key 1 in /home/rohan/carnet-numerique/public/src/generate.php on line 9
PHP Warning:  Undefined array key 1 in /home/rohan/carnet-numerique/public/src/generate.php on line 9
PHP Warning:  Undefined array key 1 in /home/rohan/carnet-numerique/public/src/generate.php on line 9
PHP Warning:  Undefined array key 1 in /home/rohan/carnet-numerique/public/src/generate.php on line 9
ffmpeg version 5.1.1-1ubuntu2.1 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 12 (Ubuntu 12.2.0-3ubuntu1)
  configuration: --prefix=/usr --extra-version=1ubuntu2.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librist --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --disable-sndio --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-libplacebo --enable-shared
  libavutil      57. 28.100 / 57. 28.100
  libavcodec     59. 37.100 / 59. 37.100
  libavformat    59. 27.100 / 59. 27.100
  libavdevice    59.  7.100 / 59.  7.100
  libavfilter     8. 44.100 /  8. 44.100
  libswscale      6.  7.100 /  6.  7.100
  libswresample   4.  7.100 /  4.  7.100
  libpostproc    56.  6.100 / 56.  6.100
Input #0, matroska,webm, from '/home/rohan/Documents/dodoc2/_projects/its-a-test/video-20230404-091933-682.webm':
  Metadata:
    encoder         : QTmuxingAppLibWebM-0.0.1
  Duration: N/A, start: -0.001000, bitrate: N/A
  Stream #0:0(eng): Video: vp8, yuv420p(progressive), 1280x720, SAR 1:1 DAR 16:9, 1k tbr, 1k tbn (default)
  Stream #0:1(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
Stream mapping:
  Stream #0:0 -> #0:0 (vp8 (native) -> vp9 (libvpx-vp9))
  Stream #0:1 -> #0:1 (opus (native) -> opus (libopus))
Press [q] to stop, [?] for help
[libvpx-vp9 @ 0x55952c183000] v1.12.0
Output #0, webm, to 'clip1.webm':
  Metadata:
    encoder         : Lavf59.27.100
  Stream #0:0(eng): Video: vp9, yuv420p(tv, bt470bg/unknown/unknown, progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 3000 kb/s, 1k fps, 1k tbn (default)
    Metadata:
      encoder         : Lavc59.37.100 libvpx-vp9
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
  Stream #0:1(eng): Audio: opus, 48000 Hz, stereo, flt, 192 kb/s (default)
    Metadata:
      encoder         : Lavc59.37.100 libopus
frame=  229 fps= 11 q=12.0 Lsize=    2786kB time=00:00:07.52 bitrate=3034.7kbits/s speed=0.377x    
video:2601kB audio:181kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.175036%
PHP Warning:  Undefined array key "clip2_desc" in /home/rohan/carnet-numerique/public/src/generate.php on line 29
PHP Fatal error:  Uncaught TypeError: addslashes(): Argument #1 ($string) must be of type string, null given in /home/rohan/carnet-numerique/public/src/generate.php:29
Stack trace:
#0 /home/rohan/carnet-numerique/public/src/generate.php(29): addslashes()
#1 {main}
  thrown in /home/rohan/carnet-numerique/public/src/generate.php on line 29

    at ChildProcess.exithandler (child_process.js:275:12)
    at emitTwo (events.js:126:13)
    at ChildProcess.emit (events.js:214:7)
    at maybeClose (internal/child_process.js:925:16)
    at Socket.stream.socket.on (internal/child_process.js:346:11)
    at emitOne (events.js:116:13)
    at Socket.emit (events.js:211:7)
    at Pipe._handle.close [as _onclose] (net.js:554:12)
  killed: false,
  code: 255,
  signal: null,
  cmd: 'php ./public/src/generate.php projectPath=\'/home/rohan/Documents/dodoc2/_projects/its-a-test\' musicPath=\'/_musics/classic.mp3\' clip1_name=\'\' clip2_name=\'\' clip3_name=\'\' clip4_name=\'\' clip5_name=\'\' clip1_desc=\'It\'s a first test\' clip2_desc=\'It\'s a second test\' clip3_desc=\'It\'s a third test\' clip4_desc=\'It\'s a fourth\' clip5_desc=\'It\'s a last test\' project_desc=\'\' workshop_type=\'Atelier Robotique\' title=\'It\'s a test\' participants=\'Molinillo Rohan\n\'' }


  


• How to stream Audio/Video using Node.js express streaming with ffmpeg and flowplayer usage ??

  30 septembre 2014, par iknowv

  I want to create node server which streams media file to public using express module in chunks

  Server.js ( This is nodejs server which works for me but without chunks )

              var express = require('express');
  
              var app = express();
  
  
  
              var http = require('http');
  
              var fs = require('fs');
  
              var path = require('path');
  
              var ext = /[\w\d_-]+\.[\w\d]+$/;
  
  
  
              ffmpeg_path = "ffmpeg\\";
  
              app.get('/player', function(req, res){
  
              res.writeHead(200, {'Content-Type': 'text/html'});
  
              fs.createReadStream('video.html').pipe(res);
  
              });
  
  
  
              app.get('/audio', function(req, res){
  
  
  
              myParam = [];
  
              myParam.push("-i","","-f","mp3","pipe:1");
  
              myParam[1] = 'media\\example_aac.m4a';
  
              var child_process = require("child_process");
  
              ffmpeg = child_process.spawn(ffmpeg_path + 'ffmpeg.exe',myParam);   
  
              ffmpeg.stderr.on('data', function(data)
  
              {
  
                  console.log('ffmpeg .error=' + data.toString());
  
              });
  
               res.writeHead(200, {
  
                 'Content-Type': 'audio/mp3'
  
               });
  
              ffmpeg.stdout.pipe(res); 
  
              });
  
  
  
  
  
              app.get('/video', function(req, res){
  
  
  
              myParam = [];
  
              myParam.push("-i","","-f","flv","pipe:1");
  
              myParam[1] = 'media\\example_video.wmv';
  
              var child_process = require("child_process");
  
              ffmpeg = child_process.spawn(ffmpeg_path + 'ffmpeg.exe',myParam);   
  
              ffmpeg.stderr.on('data', function(data)
  
              {
  
                  console.log('ffmpeg .error=' + data.toString());
  
              });
  
              /*ffmpeg.stdout.on('data', function(data)
  
              {
  
              //var buff = new Buffer(data).toString();
  
              //res.send(buff);
  
              });*/
  
              res.writeHead(200, {
  
                 'Content-Type': 'video/flv'
  
               });
  
              ffmpeg.stdout.pipe(res); 
  
              });
  
  
  
              app.listen(3000);

  =================================================

  video.html

                  <code class="echappe-js">&lt;script src=&quot;http://releases.flowplayer.org/js/flowplayer-3.2.13.min.js&quot;&gt;&lt;/script&gt;
              
  
              
  
              
  Audio Player
              
  
              
              
  
              
  Video Player
              
  
              
              
              
  &lt;script type=&quot;text/javascript&quot;&gt;<br />
  
              $f(&quot;player&quot;, &quot;http://releases.flowplayer.org/swf/flowplayer-3.2.18.swf&quot;, {<br />
  
              clip: {<br />
  
                 autoPlay: false,<br />
  
                 url: &quot;http://localhost:3000/audio&quot;<br />
  
              },<br />
  
               plugins: {<br />
  
                  controls: {<br />
  
                      fullscreen: false,<br />
  
                      height: 30,<br />
  
                      autoHide: false<br />
  
                  }<br />
  
              }<br />
  
  <br />
  
              });<br />
  
              &lt;/script&gt;
              
  &lt;script type=&quot;text/javascript&quot;&gt;<br />
  
              flowplayer(&quot;videoplayer&quot;, &quot;http://localhost/flowplayer/flowplayer.commercial-3.2.2.swf&quot;, {<br />
  
                  clip: {<br />
  
                      autoPlay: false,<br />
  
                      autoBuffering: false,<br />
  
                      scaling: 'fit',<br />
  
                      url: 'http://localhost:3000/video',<br />
  
                      captionUrl: ''<br />
  
                      },<br />
  
                      plugins: {<br />
  
                  controls: {<br />
  
                      fullscreen: false,<br />
  
                      height: 30,<br />
  
                      autoHide: false<br />
  
                  }<br />
  
              }<br />
  
                  }<br />
  
              );<br />
  
              &lt;/script&gt;
  
  

• Gstreamer pipeline to scale down video before streaming

  20 novembre 2014, par r3dsm0k3

  Here is what Im trying to achieve.

  Im streaming from a Logitech C920 camera on beaglebone black with gstreamer. I have to save a copy of the video saved locally while it is streaming. I have achieved that with tee.
  Logitech camera gives h264 encoded video at a certain bitrate, mostly very high.

  Im streaming from a moving car on 3G, and the network is not good enough to send the stream to nginx-rtmp server Im using to re-distribute thus gives strong artifacts in the result.

  Im able to alter the bitrate of captured video using uvch264.
  But then, the locally saved video also would have lower bitrate.

  Is there anyway of capturing a higher bitrate 1080p video from the camera and sending a lower resolution, lower bitrate video the streaming server ?

  Following is the pipeline I have currently.

  gst-launch-1.0 -v -e uvch264src initial-bitrate=400000 average-bitrate=400000 iframe-period=3000  device=/dev/video0 name=src auto-start=true  src.vidsrc ! queue ! video/x-h264,width=1920,height=1080,framerate=30/1 ! h264parse ! flvmux streamable=true  name=flvmuxer ! queue ! tee name=t ! queue ! filesink location=/mnt/test.flv t. ! queue ! rtmpsink location=$SERVER/hls/$CAM1

  I could also try sending the higher bitrate video to a udpsink instead of rtmpsink and with another gstreamer process parallely and takes the data using a udpsink and probably post process/ re-encode and send to rtmp server.

  Im also limited by the processing speed BeagleBone has to do for encoding the videos. Currently Im trying for 1 camera and in the finished project I would like to have 2 cameras connected. Upload speed Im getting for the network is under 1Mbps.

  How do I solve this with less load on the BeagleBone ? Im very open to a new architecture as well.