Newest 'ffmpeg' Questions - Stack Overflow

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• Programmatically blend two frames using libavfilter

  19 septembre 2013, par Alexander Eroma

  I need to programmatically draw an image over the video frame when encoding video via libavcodec. (which is part of ffmpeg). As I understand I need to use libavfilter tools to do this.

  I can access AVFilter via avfilter_get_by_name("blend"). Also I can access filter graph via avfilter_graph_create_filter(&filterCtx, filter, "blender", NULL, NULL, fgr). But I can not understand what should I do next.

  I have two AV frames, for example:

  AVFrame* bottomFrame;
  AVFrame* topFrame;
  

  How can I put topFrame over the bottomFrame using libav API?

  Thank you

• ffmpeg+php Add Music to video

  19 septembre 2013, par user2792392

  Dear Sir i create this code for simple video convert from one to another. i want to add more feature like
  ffmpeg+php Add Music to video

  how to do it?? convert request to begin encoding the video, and status request that retrieves * the current encoding status so the progress bar can be updated. * * The $outfile variable should be changed to an input value, but is set this way * for now for testing purposes. * * @ver 0.1 */ require 'config.php'; require 'functions.php';

  //<<-- CHECK FOR ERRORS -->>//
  $type       = _chkVal('type', '');
  $fkey       = _chkVal('fkey', '');
  $infile     = _chkVal('filename', '');
  $outfile    = 'testing.mp4';
  $params     = _chkVal('params', '');
  
  // Check Request Type
  $validTypes = array('convert', 'status');
  
  if( !in_array($type, $validTypes) )
      json_response(array('fkey' => $fkey, 'msg' => 'Invalid process type!'), true);
  
  // $fkey will always be 8 characters.
  // It's created with PHP's hash() function using 'crc32' algorithm in index.php
  if( strlen($fkey) != 8 )
      json_response(array_merge(array('fkey' => '', 'msg' => 'Invalid fkey given!')), true);
  
  // Filename should be at least 5 (1 character + 4 character extension. EX : i.mp4)
  if( $type == 'convert' && ( strlen($infile) < 5) )
      json_response(array('fkey' => $fkey, 'msg' => 'Invalid input filename given!'), true);
  
  // Filename should be at least 5 (1 character + 4 character extension. EX : i.mp4)
  if( $type == 'convert' && ( strlen($outfile) < 5) )
      json_response(array('fkey' => $fkey, 'msg' => 'Invalid output filename given!'), true);
  
  if( $type == 'convert' && (strlen($params) < 1) )
      json_response(array('fkey' => $fkey, 'msg' => 'Invalid parameters given!'), true);
  
  //<<-- END OF ERROR CHECK -->>//
  
  
  $ffmpegConvert = new ffmpegConvert($fkey);
  
  
  //<<-- PROCESS REQUEST -->>//
  
  // Start the video conversion
  if( $type == 'convert' )
  {
      $ffmpegConvert->exec( $infile, $outfile, $params, $fkey );
      // Add 2 second delay to give the server time to start writing the status log,
      // otherwise $ffmpegConvert->jsonStatus() will trigger an error...
      sleep(2);
      $ffmpegConvert->jsonStatus();
  }
  
  // Check on video conversion progress
  if( $_POST['type'] == 'status' )
  {
      $ffmpegConvert->jsonStatus();
  }
  
  //<<-- END OF PROCESS REQUEST -->>//
  
  // Shouldn't get to this, but if so, let's send a message for debugging reasons....
  json_response(array('msg' => 'Unhandled request type!'), true);
  

• How to count video length and size in PHP ?

  19 septembre 2013, par Learn PHP

  I want to get video details like length, size, frame, height and width from one video url.

  I got the video details after download video using ffmpeg but unable to find the details of video from URL.

  Here is my download video youtube link.

  http://r4---sn-np4tjvg2-cvhe.c.youtube.com/videoplayback?fexp=927610%2C935016%2C941300%2C916626%2C936204%2C924606%2C929117%2C929121%2C929906%2C929907%2C929922%2C929923%2C929127%2C929129%2C929131%2C929930%2C936403%2C925724%2C925726%2C936310%2C925720%2C925722%2C925718%2C925714%2C929917%2C906945%2C929933%2C929935%2C920302%2C906842%2C913428%2C920605%2C919811%2C935020%2C935021%2C932309%2C913563%2C919373%2C930803%2C908536%2C932211%2C938701%2C931924%2C934005%2C940501%2C936308%2C909549%2C901608%2C900816%2C912711%2C934507%2C907231%2C936312%2C906001&itag=17&sver=3&expire=1379625974&sparams=algorithm%2Cburst%2Ccp%2Cfactor%2Cgcr%2Cid%2Cip%2Cipbits%2Citag%2Csource%2Cupn%2Cexpire&mt=1379599833&mv=u&id=a1902c59b3e797d1&upn=rjoiIino7rU&factor=1.25&source=youtube&ms=au&algorithm=throttle-factor&burst=40&gcr=in&key=yt1&ip=202.191.214.174&cp=U0hWTlZNU19MTkNONl9OR1dKOlZGT2E1U2xXM0hN&ipbits=8&signature=CEE61FCB88931236269EE8661F62C1D834DCD32E.95869B5D4D79ED6D4D890749A49C228631CD3340
  

• flv thumbnail using ffmpeg asp.net

  19 septembre 2013, par Michael

  I am trying to find a working sample on how to generate a thumbnail from a flv file using ffmpeg and asp.net & VB.net. I am uploading a pre-encoded flv so I do not have to generate the video file, just the thumbnail.

  Anyone have any suggestions?

• ffmpeg options for playing in iPad WebView with tag

  19 septembre 2013, par Waynn Lue

  I'm trying to convert a video to be played in a tag in a WebView in iOS. I've tried the options at this link but it still doesn't seem to play. I've found videos that do successfully play, though, so I'm sure it's possible, I just can't seem to get any working. Here's the ffmpeg -i output for something that works.

  Here's what I tried from the wiki:

  ffmpeg -i {filename} -acodec aac -ac 2 -strict experimental -ab 160k -vcodec libx264 -preset slow -profile:v baseline -level 30 -maxrate 10000000 -bufsize 10000000 -b 1200k -f mp4 -threads 0 {filename}.ipad.mp4
  

  But the file doesn't play in the WebView.

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.m4v':
    Metadata:
      major_brand     : M4V 
      minor_version   : 1
      compatible_brands: M4V M4A mp42isom
      creation_time   : 2005-12-20 20:20:15
    Duration: 00:01:25.50, start: 0.000000, bitrate: 209 kb/s
      Stream #0:0(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, s16, 115 kb/s
      Metadata:
        creation_time   : 2005-12-20 20:20:15
        handler_name    : Apple Sound Media Handler
      Stream #0:1(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 320x240, 90 kb/s, 10 fps, 10 tbr, 1k tbn, 2k tbc
      Metadata:
        creation_time   : 2005-12-20 20:20:15
        handler_name    : Apple Video Media Handler
  

  And here's the output for my input file:

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'cheerfulness.mov':
    Metadata:
      major_brand     : qt  
      minor_version   : 537199360
      compatible_brands: qt  
      creation_time   : 2013-07-31 00:47:22
    Duration: 00:00:06.00, start: 0.000000, bitrate: 120849 kb/s
      Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1200x1920, 120823 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 60k tbc
      Metadata:
        creation_time   : 2013-07-31 00:48:33
        handler_name    : Apple Alias Data Handler
  

  edit: Here's the full output of the command:

  wlue:$ ffmpeg -i cheerfulness.mov -acodec aac -ac 2 -strict experimental -ab 160k -vcodec libx264 -preset slow -profile:v baseline -level 30 -maxrate 10000000 -bufsize 10000000 -b 1200k -f mp4 -threads 0 output.ipad.mp4
  ffmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers
    built on Sep 18 2013 18:44:15 with Apple LLVM version 4.2 (clang-425.0.28) (based on LLVM 3.2svn)
    configuration: --prefix=/usr/local/Cellar/ffmpeg/1.2.1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=cc --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid
    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
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'cheerfulness.mov':
    Metadata:
      major_brand     : qt  
      minor_version   : 537199360
      compatible_brands: qt  
      creation_time   : 2013-07-31 00:47:22
    Duration: 00:00:06.01, start: 0.000000, bitrate: 120849 kb/s
      Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1200x1920, 120823 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 60k tbc
      Metadata:
        creation_time   : 2013-07-31 00:48:33
        handler_name    : Apple Alias Data Handler
  Please use -b:a or -b:v, -b is ambiguous
  [libx264 @ 0x7fa67401fa00] frame MB size (75x120) > level limit (1620)
  [libx264 @ 0x7fa67401fa00] DPB size (5 frames, 17280000 bytes) > level limit (0 frames, 3110400 bytes)
  [libx264 @ 0x7fa67401fa00] MB rate (269730) > level limit (40500)
  [libx264 @ 0x7fa67401fa00] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
  [libx264 @ 0x7fa67401fa00] profile Constrained Baseline, level 3.0
  [libx264 @ 0x7fa67401fa00] 264 - core 125 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=0 ref=5 deblock=1:0:0 analyse=0x1:0x111 me=umh subme=8 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=abr mbtree=1 bitrate=1200 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=10000 vbv_bufsize=10000 nal_hrd=none ip_ratio=1.40 aq=1:1.00
  Output #0, mp4, to 'output.ipad.mp4':
    Metadata:
      major_brand     : qt  
      minor_version   : 537199360
      compatible_brands: qt  
      encoder         : Lavf54.63.104
      Stream #0:0(eng): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1200x1920, q=-1--1, 1200 kb/s, 30k tbn, 29.97 tbc
      Metadata:
        creation_time   : 2013-07-31 00:48:33
        handler_name    : Apple Alias Data Handler
  Stream mapping:
    Stream #0:0 -> #0:0 (h264 -> libx264)
  Press [q] to stop, [?] for help
  frame=  180 fps= 16 q=-1.0 Lsize=     828kB time=00:00:06.00 bitrate=1129.2kbits/s    
  video:826kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.177851%
  [libx264 @ 0x7fa67401fa00] frame I:2     Avg QP:32.23  size: 20942
  [libx264 @ 0x7fa67401fa00] frame P:178   Avg QP:41.03  size:  4515
  [libx264 @ 0x7fa67401fa00] mb I  I16..4: 90.1%  0.0%  9.9%
  [libx264 @ 0x7fa67401fa00] mb P  I16..4:  6.8%  0.0%  0.0%  P16..4: 16.8%  0.6%  0.2%  0.0%  0.0%    skip:75.5%
  [libx264 @ 0x7fa67401fa00] final ratefactor: 37.56
  [libx264 @ 0x7fa67401fa00] coded y,uvDC,uvAC intra: 1.2% 16.4% 2.1% inter: 0.1% 3.4% 0.1%
  [libx264 @ 0x7fa67401fa00] i16 v,h,dc,p: 49% 23%  4% 24%
  [libx264 @ 0x7fa67401fa00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13%  8% 36%  8% 12%  9%  8%  4%  2%
  [libx264 @ 0x7fa67401fa00] i8c dc,h,v,p: 88%  6%  5%  1%
  [libx264 @ 0x7fa67401fa00] ref P L0: 47.7% 22.0% 16.7%  5.7%  7.9%
  [libx264 @ 0x7fa67401fa00] kb/s:1126.21