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• Improve ffmpeg performance

  8 décembre 2014, par hitesh

  I am using ffmpeg to take screen shot from video , it is video from CDN.

  I am doing below steps

  1.Upload video to CDN using html file tag.

  2.Get CDN url and use it for creating screen shot using ffmpeg.

  3.Upload the screenshot in CDN.

  4.Save video and screenshot CDN url to DB

  the whole process is really time consuming, even if I put loader it is really slow.

  This is code of POC I did for ffmpeg :

  $imageFile = realpath("./videos") . '/test5.png';
  
  $imageFile2 = realpath("./videos") . '/test6.png';
  
  $size = "230x155";
  
  $getfromsecond = 8;
  
  
  
  if (isEnabled('shell_exec')) {
  
      echo "Shall_exec is enabled " . "<br />";
  
      shell_exec('echo "hello world"');
  
      echo "<br />";
  
  } else {
  
      echo "shall exec command is not allowed";
  
  }
  
  
  
  $cmd = "ffmpeg -i $vid -an -ss $getfromsecond -s $size -vframes 1 $imageFile";
  
  $cmd2 = "ffmpeg -i $remoteVideo -an -ss $getfromsecond -s $size -vframes 1 $imageFile2";
  
  
  
  echo 'command 1 - local Image : ' . $cmd . "<br />";
  
  echo 'command 2 - remote video : ' . $cmd2 . "<br />";
  
  echo "<br />command 2 - remote video shell_exec output : " . shell_exec($cmd) . "<br />";
  
  echo '<br />command 2 - remote video shell_exec output : ' . shell_exec($cmd2) . "<br />";
  
  
  
  if (!shell_exec($cmd)) {
  
      echo " video Thumbnail created" . "<br />";
  
  } else {
  
      echo "Error Creating video thumbnail" . "<br />";
  
  }
  
  if (!shell_exec($cmd2)) {
  
      echo "Remote video Thumbnail created" . "<br />";
  
  } else {
  
      echo "Error Creating Remote video thumbnail" . "<br />";
  
  }
  
  
  
  function isEnabled($func) {
  
      return is_callable($func) &amp;&amp; false === stripos(ini_get('disable_functions'), $func);
  
  }  

  Is there some way to improve ffmpeg performance ?

  Thanks

• ffmpeg change video stream resolution

  10 décembre 2014, par skorpionet

  I have an MKV with a video stream with wrong resolution of 1920x800, but the inside film is 1920x1080 so my main video player, an LG Smart TV, shows a flattened image. I can easily change resolution in container metadata but LG TV ignores this data and read only video stream data.

  First question : only way to change video stream resolution data is scale the video ?

  To scale with ffmpeg I used this command :

  ffmpeg -i input.mkv -map 0 -c:a copy -c:s copy -c:v libx264 -preset slow -crf 17 -vf scale=1920:1080,setdar=16/9 output.mkv

  Now the mkv is fine, my LG TV read it, looks awesome but..... size went from 3,3Gb to 12Gb !!
  Overall bit rate of 3,3Gb video is 2.704 Kbps, 12Gb is 9.829 Kbps. I think that 7000Kbps more are useless, in original video there aren’t info to raise quality.

  Second question : Why this huge size change ? What is my mistake ?

  Best Regards

• ffmpeg conversion x264 [error] : malloc of size 769152 failed

  18 décembre 2014, par prashanthp

  I am trying to convert video recorded from Android smart watch (.mp4 format) to a format (.mp4) which playable on all browsers. The video recorded from smart watch is not playing in the browsers. so, i’ve used ffmpeg to convert in into a playable mp4 format.

  But sometimes it is showing error as x264 [error]: malloc of size 503008 failed

  What is the reason for this. Sometimes it’s getting converted and sometimes it is showing error .

  Here is the console output.

   /usr/local/ffmpeg_build/ffmpeg/bin/ffmpeg  -i /home/xestatt1/public_html/app/webroot/mobile/uploads/in/Dec152014161945.mp4 -vcodec libx264   -r 24 -s 352*288 -acodec aac  -ab 12k -strict -2  /home/xestatt1/public_html/app/webroot/mobile/uploads/out/ot12.mp4
  
  
  
  ffmpeg version 2.5.git Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Dec 13 2014 05:42:08 with gcc 4.1.2 (GCC) 20080704 (Red Hat 4.1.2-55)
  
    configuration: --prefix=/usr/local/ffmpeg_build/ffmpeg --enable-libx264 --enable-gpl --extra-cflags=-I/usr/local/ffmpeg_build/x264/include --extra-ldflags=-L/usr/local/ffmpeg_build/x264/lib
  
    libavutil      54. 15.100 / 54. 15.100
  
    libavcodec     56. 14.100 / 56. 14.100
  
    libavformat    56. 15.103 / 56. 15.103
  
    libavdevice    56.  3.100 / 56.  3.100
  
    libavfilter     5.  2.103 /  5.  2.103
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/xestatt1/public_html/app/webroot/mobile/uploads/in/Dec152014161945.mp4':
  
    Metadata:
  
      major_brand     : 3gp4
  
      minor_version   : 0
  
      compatible_brands: isom3gp4
  
      creation_time   : 2014-12-15 10:50:02
  
    Duration: 00:00:10.12, start: 0.000000, bitrate: 151 kb/s
  
      Stream #0:0(eng): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 135 kb/s, 13.14 fps, 50 tbr, 90k tbn, 200 tbc (default)
  
      Metadata:
  
        creation_time   : 2014-12-15 10:50:02
  
        handler_name    : VideoHandle
  
        encoder         :
  
      Stream #0:1(eng): Audio: amr_nb (samr / 0x726D6173), 8000 Hz, mono, flt, 12 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-12-15 10:50:02
  
        handler_name    : SoundHandle
  
  File '/home/xestatt1/public_html/app/webroot/mobile/uploads/out/ot12.mp4' already exists. Overwrite ? [y/N] y
  
  [libx264 @ 0x13b69120] using SAR=12/11
  
  [libx264 @ 0x13b69120] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.1 Cache64
  
  [libx264 @ 0x13b69120] profile High, level 1.3
  
  [libx264 @ 0x13b69120] 264 - core 142 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 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=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=24 scenecut=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 '/home/xestatt1/public_html/app/webroot/mobile/uploads/out/ot12.mp4':
  
    Metadata:
  
      major_brand     : 3gp4
  
      minor_version   : 0
  
      compatible_brands: isom3gp4
  
      encoder         : Lavf56.15.103
  
      Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 352x288 [SAR 12:11 DAR 4:3], q=-1--1, 24 fps, 12288 tbn, 24 tbc (default)
  
      Metadata:
  
        creation_time   : 2014-12-15 10:50:02
  
        handler_name    : VideoHandle
  
        encoder         : Lavc56.14.100 libx264
  
      Stream #0:1(eng): Audio: aac ([64][0][0][0] / 0x0040), 8000 Hz, mono, fltp, 12 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-12-15 10:50:02
  
        handler_name    : SoundHandle
  
        encoder         : Lavc56.14.100 aac
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))
  
    Stream #0:1 -> #0:1 (amr_nb (amrnb) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  Past duration 1.000000 too large
  
  Multiple frames in a packet from stream 1
  
  Past duration 1.000000 too large
  
  av_interleaved_write_frame(): Cannot allocate memory
  
  x264 [error]: malloc of size 769152 failed
  
  Video encoding failed
  
  [libx264 @ 0x13b69120] frame I:1     Avg QP:22.20  size:  3166
  
  [libx264 @ 0x13b69120] mb I  I16..4: 28.3% 70.5%  1.3%
  
  [libx264 @ 0x13b69120] 8x8 transform intra:70.5%
  
  [libx264 @ 0x13b69120] coded y,uvDC,uvAC intra: 47.5% 55.3% 12.4%
  
  [libx264 @ 0x13b69120] i16 v,h,dc,p: 16% 26%  6% 52%
  
  [libx264 @ 0x13b69120] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 19% 15% 12%  3%  3%  3%  5% 16%
  
  [libx264 @ 0x13b69120] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16%  2% 20% 10% 16% 14%  4% 11%  6%
  
  [libx264 @ 0x13b69120] i8c dc,h,v,p: 61% 17% 19%  4%
  
  [libx264 @ 0x13b69120] kb/s:607.87
  
  [aac @ 0x13b6a4c0] 2 frames left in the queue on closing
  
  Conversion failed!

  UPDATED

  When i execute this from shell it is working fine. But when i create a script file and trying to execute that script file from php , it is showing error’s. I increased the memory limit in php, still it is showing error. Also , we are using ZEND framework. Is there any problems with ZEND ??