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• How to grab voice and video in ffmpeg/mplayer/mencoder ? [closed]

  4 février 2013, par Kill Kill

  My target is to grab voice and video via webcamera.
  There are three ways to do :

  1.ffmpeg

  ffmpeg -f oss -i /dev/dsp -f video4linux2 -r 25 -b 500000 -s 320x240 -i /dev/video0 out.mpg  
  
  WARNING: gnome-keyring:: couldn't connect to: /home/debian/.cache/keyring-4Hzs4r/pkcs11: No such file or directory  
  
  ffmpeg version 0.8.5-6:0.8.5-1, Copyright (c) 2000-2012 the Libav developers  
  
  built on Jan 13 2013 16:02:15 with gcc 4.7.2  
  
  *** THIS PROGRAM IS DEPRECATED ***  
  
  This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.  
  
  [oss @ 0x9d63c60] /dev/dsp: No such file or directory  
  
  /dev/dsp: Input/output error

  in my computer how to revise it ?

  2.mplayer :

  mplayer tv:// -tv driver=v4l2:input=0:width=640:height=480:fps=25 -vo x11  

  I can see the video when the command run, how can I save the output into a file and grab the voice ?

  3.mencoder :

  mencoder tv:// -tv driver=v4l2:width=800:height=600:device=/dev/video0:fps=30:outfmt=yuy2:forceaudio:alsa:adevice=hw.2,0 -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=1800 -ffourcc xvid -oac mp3lame -lameopts cbr=128 -o output.avi  
  
  
  
  MEncoder svn r34540 (Debian), built with gcc-4.7 (C) 2000-2012 MPlayer Team  
  
  success: format: 9 data: 0x0 - 0x0  
  
  TV file format detected.  
  
  Selected driver: v4l2  
  
  name: Video 4 Linux 2 input  
  
  author: Martin Olschewski   
  
  comment: first try, more to come   
  
  v4l2: your device driver does not support VIDIOC_G_STD ioctl, VIDIOC_G_PARM was used instead.  
  
  Selected device: PC Camera  
  
  Capabilities: video capture read/write streaming  
  
  supported norms:  
  
  inputs: 0 = zc3xx;  
  
  Current input: 0  
  
  Current format: unknown (0x4745504a)  
  
  tv.c: norm_from_string(pal): Bogus norm parameter, setting default.  
  
  v4l2: ioctl enum norm failed: Inappropriate ioctl for device  
  
  Error: Cannot set norm!  
  
  Selected input hasn't got a tuner!  
  
  ALSA lib pcm_hw.c:1401:(_snd_pcm_hw_open) Invalid value for card  
  
  Error opening audio: No such file or directory  
  
  ALSA lib pcm_hw.c:1401:(_snd_pcm_hw_open) Invalid value for card  
  
  Error opening audio: No such file or directory  
  
  ALSA lib pcm_hw.c:1401:(_snd_pcm_hw_open) Invalid value for card  
  
  Error opening audio: No such file or directory  
  
  v4l2: ioctl set mute failed: Invalid argument  
  
  v4l2: 0 frames successfully processed, 0 frames dropped.  
  
  ============ Sorry, this file format is not recognized/supported =============  
  
  === If this file is an AVI, ASF or MPEG stream, please contact the author! ===  
  
  Cannot open demuxer.  
  
  
  
  Exiting...  

• Encoding a readable movie by QuickTime using FFMPEG

  3 octobre 2014, par itamarb

  I’m trying to encode an image sequence using the following command :

  ffmpeg.exe -i %d.png -f mp4 -vcodec h264 test.mp4

  However, QuickTime failed to open this file or sometimes play a black movie, while this movie plays great in VLC player. Any suggestions how to make it play well in QuickTime ?

  Here is the output :

  ffmpeg.exe -i %d.png -f mp4 -vcodec libx264 13.mp4
  
  ffmpeg version N-49044-g89afa63 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jan 19 2013 20:36:06 with gcc 4.7.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libg
  
  sm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --e
  
  nable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --e
  
  nable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --en
  
  able-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable
  
  -libxavs --enable-libxvid --enable-zlib --enable-filter=frei0r
  
    libavutil      52. 15.100 / 52. 15.100
  
    libavcodec     54. 89.100 / 54. 89.100
  
    libavformat    54. 61.101 / 54. 61.101
  
    libavdevice    54.  3.102 / 54.  3.102
  
    libavfilter     3. 32.101 /  3. 32.101
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100
  
  [image2 @ 0221b940] max_analyze_duration 5000000 reached at 5000000 microseconds
  
  
  
  Input #0, image2, from '%d.png':
  
    Duration: 00:01:19.36, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: png, rgb24, 639x480, 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  [libx264 @ 0221edc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE
  
  4.2 AVX
  
  [libx264 @ 0221edc0] profile High 4:4:4 Predictive, level 3.0, 4:4:4 8-bit
  
  [libx264 @ 0221edc0] 264 - core 129 r2230 1cffe9f - H.264/MPEG-4 AVC codec - Cop
  
  yleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deb
  
  lock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 m
  
  e_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chro
  
  ma_qp_offset=4 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 in
  
  terlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b
  
  _bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecu
  
  t=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0
  
   qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to '13.mp4':
  
    Metadata:
  
      encoder         : Lavf54.61.101
  
      Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv444p, 639x480, q=-1--1
  
  , 12800 tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (png -> libx264)
  
  Press [q] to stop, [?] for help
  
  frame=   76 fps=0.0 q=28.0 size=       3kB time=00:00:00.96 bitrate=  22.3kbits/
  
  frame=  156 fps=155 q=28.0 size=       7kB time=00:00:04.16 bitrate=  14.7kbits/
  
  frame=  219 fps=145 q=28.0 size=      12kB time=00:00:06.68 bitrate=  14.1kbits/
  
  frame=  283 fps=141 q=28.0 size=      16kB time=00:00:09.24 bitrate=  14.2kbits/
  
  frame=  352 fps=140 q=28.0 size=      25kB time=00:00:12.00 bitrate=  17.4kbits/

• Realtime ffmpeg shell output PHP

  26 septembre 2013, par matthew johnston

  Alright, I've been fighting this problem for a few days. Works fine on my local windows machine but, can't seem to get it to work on my CentOS server. My script grabs the duration of the video being converted and also grabs the current seconds it has processed inside of ffmpeg. However, it is only grabbing the "input file" of the ffmpeg output and stopping there. I have tried using both pipes (STDOUT [1] & STDERR [2]) for some reason ffmpeg likes to output on the STDERR pipe. Weird.

  $filename = "somefilename.tmp";
  
  $descriptor = array(
  
      0 => array("pipe", "r"),
  
      1 => array("pipe", "w"),
  
      2 => array("pipe", "w")
  
  );
  
  
  
  $ffmpeg = "ffmpeg -i /var/www/spotloader/videos/flipped/tmp/".$file."_comb.ts -vcodec mpeg2video -acodec pcm_s16le -pix_fmt yuv422p -vtag xdvb -b:v 13000k -r 30000/1001 /var/www/spotloader/videos/flipped/tmp/".$file.".mov";
  
  
  
  //open the process
  
  $process = proc_open($ffmpeg, $descriptor, $pipes, NULL, $_ENV);
  
  
  
  //if the process opened
  
  if ( is_resource( $process ) == true )
  
  {
  
      //get process status
  
      $procStatus = proc_get_status( $process );
  
  
  
      //if its running, let node know
  
      if ( $procStatus['running'] )
  
      {
  
          //nodejs socket, nothing wrong here
  
          $this->_sendSocket('converting', array('filename' => str_replace('.tmp', '', $file)));
  
      }
  
  
  
      //while the process is running
  
      while( $procStatus['running'] === true )
  
      {
  
          //there is output in the pipe
  
          if ( !feof( $pipes[1] ) )
  
          {
  
              //get the output
  
              $data = fgets($pipes[1], 128);
  
              //match the outputs duration and save it.
  
              if(preg_match('/Duration:\s([0-9]{2}:[0-9]{2}:[0-9]{2})/', $data, $matches)) 
  
              {
  
                  static $duration;
  
                  $duration = $this->_convertToSeconds($matches[1]);
  
              }
  
  
  
              //match the outputs current encoding time
  
              if(preg_match('/time=([0-9]{2}:[0-9]{2}:[0-9]{2})/', $data, $matches)) 
  
              {
  
                  //convert to seconds works fine, so it is not included.
  
                  $curTime = $this->_convertToSeconds($matches[1]);
  
                  //nodejs socket, nothing wrong here
  
                  $this->_sendSocket('update', array('percent' => round( ($curTime / $duration) * 100), 'filename' => str_replace('.tmp', '', $file)));
  
              }
  
          }
  
  
  
          //update process status
  
          $procStatus = proc_get_status( $process );
  
      }
  
  
  
      //nodejs socket, nothing wrong here
  
      $this->_sendSocket('converted', array('percent' => 100, 'filename' => str_replace('.tmp', '', $file)));
  
  }

  FFMPEG output I receive using the PHP code above

  ffmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers
  
  built on May 10 2013 15:14:14 with gcc 4.4.6 (GCC) 20120305 (Red Hat 4.4.6-4)
  
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 
  
  --mandir=/usr/share/man --enable-shared --enable-runtime-cpudetect --enable-gpl 
  
  --enable-version3 --enable-postproc --enable-avfilter --enable-pthreads 
  
  --enable-x11grab --enable-vdpau --disable-avisynth --enable-frei0r --enable-libopencv 
  
  --enable-libdc1394 --enable-libgsm --enable-libmp3lame --enable-libnut 
  
  --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg 
  
  --enable-librtmp --enable-libspeex --enable-libtheora --enable-libvorbis 
  
  --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid 
  
  --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions 
  
  -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC' 
  
  --disable-stripping
  
  libavutil      52. 18.100 / 52. 18.100
  
  libavcodec     54. 92.100 / 54. 92.100
  
  libavformat    54. 63.104 / 54. 63.104
  
  libavdevice    54.  3.103 / 54.  3.103
  
  libavfilter     3. 42.103 /  3. 42.103
  
  libswscale      2.  2.100 /  2.  2.100
  
  libswresample   0. 17.102 /  0. 17.102
  
  libpostproc    52.  2.100 / 52.  2.100
  
  [mpegts @ 0x243c620] max_analyze_duration 5000000 reached at 5016000 microseconds
  
  Input #0, mpegts, from '/var/www/spotloader/videos/flipped/tmp/Wildlife10.tmp_comb.ts':
  
  Duration: 00:00:02.02, start: 1.389978, bitrate: 227018 kb/s
  
  Program 1
  
  Metadata:
  
    service_name    : Service01
  
    service_provider: FFmpeg
  
  Stream #0:0[0x100]: Video: mpeg2video (4:2:2) ([2][0][0][0] / 0x0002), yuv422p, 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
  
  Stream #0:1[0x101](eng): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, 1 channels (FL+FR), s16p, 128 kb/s

  FFMPEG output I'm expecting the "time=00:00:00" towards the end is what I need to capture in realtime. This is taken by running the FFMPEG command directly in the shell.

  ffmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers
  
  built on May 10 2013 15:14:14 with gcc 4.4.6 (GCC) 20120305 (Red Hat 4.4.6-4)
  
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 
  
  --mandir=/usr/share/man --enable-shared --enable-runtime-cpudetect --enable-gpl 
  
  --enable-version3 --enable-postproc --enable-avfilter --enable-pthreads 
  
  --enable-x11grab --enable-vdpau --disable-avisynth --enable-frei0r --enable-libopencv 
  
  --enable-libdc1394 --enable-libgsm --enable-libmp3lame --enable-libnut 
  
  --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg 
  
  --enable-librtmp --enable-libspeex --enable-libtheora --enable-libvorbis 
  
  --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid 
  
  --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions 
  
  -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC' 
  
  --disable-stripping
  
    libavutil      52. 18.100 / 52. 18.100
  
    libavcodec     54. 92.100 / 54. 92.100
  
    libavformat    54. 63.104 / 54. 63.104
  
    libavdevice    54.  3.103 / 54.  3.103
  
    libavfilter     3. 42.103 /  3. 42.103
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100
  
  [mpegts @ 0x10c9620] max_analyze_duration 5000000 reached at 5016000 microseconds
  
  Input #0, mpegts, from '/var/www/spotloader/videos/flipped/tmp/Wildlife10.tmp_comb.ts':
  
    Duration: 00:00:02.02, start: 1.389978, bitrate: 227018 kb/s
  
    Program 1
  
      Metadata:
  
        service_name    : Service01
  
        service_provider: FFmpeg
  
      Stream #0:0[0x100]: Video: mpeg2video (4:2:2) ([2][0][0][0] / 0x0002), yuv422p, 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
  
      Stream #0:1[0x101](eng): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, 1 channels (FL+FR), s16p, 128 kb/s
  
  Channel layout 'stereo' with 2 channels does not match specified number of channels 1: ignoring specified channel layout
  
  Output #0, mov, to '/var/www/spotloader/videos/flipped/tmp/Wildlife10.tmp.mov':
  
    Metadata:
  
      encoder         : Lavf54.63.104
  
      Stream #0:0: Video: mpeg2video (xdvb / 0x62766478), yuv422p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 13000 kb/s, 30k tbn, 29.97 tbc
  
      Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mpeg2video -> mpeg2video)
  
    Stream #0:1 -> #0:1 (mp2 -> pcm_s16le)
  
  Press [q] to stop, [?] for help
  
  Input stream #0:1 frame changed from rate:48000 fmt:s16p ch:1 chl:1 channels (FL+FR) to rate:48000 fmt:s16p ch:2 chl:stereo
  
  Input stream #0:1 frame changed from rate:48000 fmt:s16p ch:2 chl:stereo to rate:48000 fmt:s16p ch:1 chl:mono
  
  Input stream #0:1 frame changed from rate:48000 fmt:s16p ch:1 chl:mono to rate:48000 fmt:s16p ch:2 chl:stereo
  
  Input stream #0:0 frame changed from size:1920x1080 fmt:yuv422p to size:1280x720 fmt:yuv422p0
  
  Input stream #0:1 frame changed from rate:48000 fmt:s16p ch:2 chl:stereo to rate:44100 fmt:s16p ch:2 chl:stereo
  
  frame=  741 fps= 52 q=2.6 size=   43866kB time=00:00:24.65 bitrate=14573.5kbits/s dup=5 drop=0

  Any ideas ? What needs changing from the switch from Windows to CentOS ?

  EDIT :
  I got this to work using popen instead. It also reduced my code. If anyone else does have a solution go ahead and post it. Thanks !