Newest 'ffmpeg' Questions - Stack Overflow

Les articles publiés sur le site

• How to take pictures of the video through mplayer or ffmpeg to php ?

  22 novembre 2012, par Zhasulan Berdybekov

  How to take pictures of the video through mplayer or ffmpeg to php?

• How to display a frame number on each frame of a video using ffmpeg ?

  22 novembre 2012, par igorg

  The test command I have is as follows:

  ffmpeg -i in.mov -vf "drawtext=fontfile=/usr/share/fonts/ttf-bitstream-vera/Vera.ttf: x=(w-tw)/2: y=h-(2*lh)-n: fontcolor=white: fontsize=40: box=1: boxcolor=0x00000000@1: text=" -an -y out.mov
  

  I want to display the frame number on each frame. However, setting the "text" variable to "n" does not help (it displays n) and %n seems to be the new line symbol. The thing that confuses me most is that this part

  y=h-(2*lh)-n
  

  works well, meaning it gets the right value of the current frame and moves the text up accordingly.

• Capture FFMPEG output in PHP

  22 novembre 2012, par Andrew

  I need to read the output from ffmpeg in order to even try the solution to my question from yesterday. This is a separate issue from my problem there, so I made a new question.

  How the heck do I get the output from an ffmpeg -i command in PHP?

  This is what I've been trying:

  <?PHP
      error_reporting(E_ALL);
      $src = "/var/videos/video1.wmv";
      $command = "/usr/bin/ffmpeg -i " . $src;
      echo "",$command,"
  ";
      $command = escapeshellcmd($command);
  
      echo "backtick:
  ";
      `$command`;
  
      echo "
  
  system:
  ";
      echo system($command);
  
      echo "
  
  shell_exec:
  ";
      echo shell_exec($command);
  
      echo "
  
  passthru:
  ";
      passthru($command);
  
      echo "
  
  exec:
  ";
      $output = array();
      exec($command,$output,$status);
      foreach($output AS $o)
      {
              echo $o , "
  ";
      }
      echo "
  
  popen:
  ";
      $handle = popen($command,'r');
      echo fread($handle,1048576);
      pclose($handle);
      echo "
  
  ";
  ?>
  

  This is my output:

  /usr/bin/ffmpeg -i /var/videos/video1.wmv
  
  backtick:
  
      
  
  
  system:
  
      
  
  
  shell_exec:
  
      
  
  
  passthru:
  
      
  
  
  exec:
  
      
  
  
  popen:
  
      
  
  
  

  I don't get it. safe_mode is off. There's nothing in disable_functions. The directory is owned by www-data (the apache user on my Ubuntu system). I get a valid status back from exec() and system() and running the same command from the command line give me tons of output. I feel like I must be missing something obvious but I have no idea what it is.

  Help. Please.

• creating Chrome compatible .mp4 with ffmpeg from commandline

  22 novembre 2012, par Baxter

  How do you encode en .mp4 file from commandline with ffmpeg, so it works in chrome? This can be really challenging, because ffmpeg has a lot of parameter combinations and Chrome are sensitive to the color encoding of the output format.

• Invalid data found when processing input

  22 novembre 2012, par user1726619

  I want to use ffmpeg lib in my library.For that purpose,i have successfully compiled it.The input video is otherwise running fine,but when i try to execute any command,i am getting this message:

  Invalid data found when processing input.
  

  I don't know whats the reason behind it.This is the code:

   public class Videokit extends Activity {
          String FilePath;
          String OutPut;
          Context mycontext;
          Videokit vk ;
          static 
          {
              System.loadLibrary("videokit");
          }
  
          public native void run(String[] args);
  
          public void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);
              setContentView(R.layout.main);
              FilePath =Environment.getExternalStorageDirectory().toString()+"/output.3gp";
              try {
                  ffmpegrun();
              } catch (IOException e) {
                  // TODO Auto-generated catch block
                  e.printStackTrace();
              }
          }
  
          public String ffmpegrun() throws IOException
          {
              boolean success=false;
              File folder = new File(Environment.getExternalStorageDirectory().toString() + "/image-%3d.jpeg");
              File file = new File(FilePath);
              System.out.println("filepath exists at:"+file.getAbsolutePath());
              if (!folder.exists()) {
                  success = folder.mkdirs();
      //              Toast.makeText(mycontext,"outfile.mp4 exists at"+folder.getAbsolutePath(),Toast.LENGTH_LONG).show();
                   OutPut = folder.getAbsolutePath();
              }
              System.out.println("outfile.flv exists at:"+folder.getAbsolutePath());
              run(new String[]{
                      "ffmpeg",
                      "-i",
                      FilePath,
                      "-r 1", 
                       "-f",
                       "image2",
                       "image-%3d.jpeg"
              }); 
              return OutPut;
          }
      }
  

  This is the log :

  10-07 17:00:03.707: D/dalvikvm(8760): Trying to load lib /data/data/uk.co.halfninja.videokit/lib/libvideokit.so 0x44e8c958
  10-07 17:00:03.837: D/dalvikvm(8760): Added shared lib /data/data/uk.co.halfninja.videokit/lib/libvideokit.so 0x44e8c958
  10-07 17:00:03.837: I/Videokit(8760): Loading native library compiled at 13:52:27 Oct  7 2012
  10-07 17:00:03.917: I/System.out(8760): filepath exists at:/sdcard/output.3gp
  10-07 17:00:03.917: I/System.out(8760): outfile.flv exists at:/sdcard/image-%3d.jpeg
  10-07 17:00:03.917: D/dalvikvm(8760): +++ not scanning '/system/lib/libwebcore.so' for 'run' (wrong CL)
  10-07 17:00:03.917: D/dalvikvm(8760): +++ not scanning '/system/lib/libmedia_jni.so' for 'run' (wrong CL)
  10-07 17:00:03.928: D/dalvikvm(8760): +++ not scanning '/system/lib/libexif.so' for 'run' (wrong CL)
  10-07 17:00:03.928: D/Videokit(8760): run() called
  10-07 17:00:03.928: D/Videokit(8760): run passing off to main()
  10-07 17:00:03.928: D/Videokit(8760): main(): registering all modules
  10-07 17:00:03.938: D/Videokit(8760): main(): registered everything
  10-07 17:00:03.938: D/Videokit(8760): main(): initting opts
  10-07 17:00:03.968: D/Videokit(8760): main(): initted opts.
  10-07 17:00:03.968: E/Videokit(8760): ffmpeg version N-30996-gf925b24, Copyright (c) 2000-2011 the FFmpeg developers
  10-07 17:00:03.979: E/Videokit(8760):   built on Oct  7 2012 13:52:32 with gcc 4.4.3
  10-07 17:00:03.979: E/Videokit(8760):   configuration: --enable-cross-compile --arch=arm5te --enable-armv5te --target-os=linux --disable-stripping --prefix=../output --disable-neon --enable-version3 --disable-shared --enable-static --enable-gpl --enable-memalign-hack --cc=arm-linux-androideabi-gcc --ld=arm-linux-androideabi-ld --extra-cflags='-fPIC -DANDROID -D__thumb__ -mthumb -Wfatal-errors -Wno-deprecated' --disable-everything --enable-decoder=mjpeg --enable-demuxer=mjpeg --enable-parser=mjpeg --enable-demuxer=image2 --enable-muxer=mp4 --enable-encoder=libx264 --enable-libx264 --enable-decoder=rawvideo --enable-protocol=file --enable-hwaccels --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-network --enable-filter=buffer --enable-filter=buffersink --disable-demuxer=v4l --disable-demuxer=v4l2 --disable-indev=v4l --disable-indev=v4l2 --extra-cflags='-I../x264 -Ivideokit' --extra-ldflags=-L../x264
  10-07 17:00:03.987: D/Videokit(8760): main(): parsing options
  10-07 17:00:03.987: D/Videokit(8760): parse_options has 7 options to parse
  10-07 17:00:04.050: E/Videokit(8760): /sdcard/output.3gp: Invalid data found when processing input
  10-07 17:00:04.050: E/Videokit(8760): ffmpeg_exit(1) called!
  

  Please help me.I am clueless about this problem.Thanks in advance.