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• Extract Video Meta Data from First Few MB on S3

  22 août 2016, par David Williams

  I have a large collection of video files on S3. I also have application servers running in AWS running a Java webapp. From those application servers, I would like to be able to extract metadata from each video file such as is provided by the Quicktime movie inspector :

  Source: /home/me/foo.mov
  
  Format: H.264, 1920x1080
  
  FPS: 29.97
  
  Data Size: 16.8 MB
  
  Data Rate: 6.70 Mbit/s

  Now, I can clearly get this information from ffmpeg :

  $ ffmpeg -i /home/me/foo.mov
  
  
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/me/foo.mov':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 1
  
      compatible_brands: isomavc1mp42
  
      creation_time   : 2014-06-30 22:40:08
  
    Duration: 00:00:20.02, start: 0.000000, bitrate: 6698 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 6696 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
  
      Metadata:
  
        creation_time   : 2014-06-30 22:39:09
  
        handler_name    : GPAC ISO Video Handler

  I could easily parse out the equivalent fields to the Quicktime output ! But, this would require I have the file locally. Is it possible to do this from the first few MB (or some other mechanism) of a file hosted on S3 without downloading the whole thing locally ? The goal here is to extract the same fields as the quicktime inspector from a file on S3. Any ideas ?

• Bash : displaying selected output, do not print unnecessary output

  2 juillet 2014, par Guillaume

  I don’t know if it’s possible :
  I’m using ffmpeg and I would like to reduce the output of a command. I have this result :

  ffmpeg version 2.2.git Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Jun 17 2014 11:08:12 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  
    configuration: --prefix=/usr/local --enable-gpl --enable-nonfree --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-libvidstab --enable-libx265
  
    libavutil      52. 89.100 / 52. 89.100
  
    libavcodec     55. 67.100 / 55. 67.100
  
    libavformat    55. 43.100 / 55. 43.100
  
    libavdevice    55. 13.101 / 55. 13.101
  
    libavfilter     4.  8.100 /  4.  8.100
  
    libswscale      2.  6.100 /  2.  6.100
  
    libswresample   0. 19.100 /  0. 19.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, hls,applehttp, from 'http://ftvodhdsecz-f.akamaihd.net/i/streaming-adaptatif_france-dom-tom/2014/S26/J7/104904507-20140629-,398,632,934,k.mp4.csmil/index_2_av.m3u8?null=':
  
    Duration: 00:51:05.07, start: 0.100667, bitrate: 0 kb/s
  
    Program 0 
  
      Metadata:
  
        variant_bitrate : 0
  
      Stream #0:0: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 704x396 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Stream #0:1: Audio: aac ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 67 kb/s
  
      Stream #0:2: Data: timed_id3 (ID3  / 0x20334449)
  
  File '/media/path/video.mkv' already exists. Overwrite ? [y/N] y
  
  [matroska @ 0x2958840] Error parsing AAC extradata, unable to determine samplerate.
  
  Output #0, matroska, to '/media/path/video.mkv':
  
    Metadata:
  
      encoder         : Lavf55.43.100
  
      Stream #0:0: Video: h264 (H264 / 0x34363248), yuv420p, 704x396 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 1k tbn, 90k tbc
  
      Stream #0:1: Audio: aac ([255][0][0][0] / 0x00FF), 48000 Hz, stereo, 67 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  [hls,applehttp @ 0x2864c20] Failed to open segment of playlist 0ate= 844.6kbits/s    
  
  frame= 3000 fps=174 q=-1.0 Lsize=   12325kB time=00:02:00.00 bitrate= 841.4kbits/s 

  I just would like to have this 4 informations :

  1) Duration: 00:51:05.07, start: 0.100667, bitrate: 0 kb/s
  
  2)  File '/media/path/video.mkv' already exists. Overwrite ? [y/N] y
  
  3)  Output #0, matroska, to '/media/path/video.mkv':
  
  4)  frame= 3000 fps=174 q=-1.0 Lsize=   12325kB time=00:02:00.00 bitrate= 841.4kbits/s 

  I’ve tried the -v option, but the output is either -v info (this long output), or -v warning, or -v error. There’s not what I would like to have.
  I’ve seen this question but the output is totally clear. Can I put an exception for specially string ?
  Thanks all

  Edit : my line in my script is like that :

  ffmpeg -i "${M3U2}" -vcodec copy -acodec copy "${Directory}/${PROG}_${ID}.mkv"

• Convert stream to a stream on the fly with ffmpeg/avconv

  6 juillet 2014, par Apacci

  I’m trying to convert flv stream to another mp3 or ogg stream. The point is I want to use mp3/ogg stream on HTML5 page, because flv stream can’t be played with HTML5. So, I configured avserver.conf :

  Port 8090
  
  BindAddress 0.0.0.0
  
  MaxHTTPConnections 2000
  
  MaxClients 1000
  
  MaxBandwidth 1000
  
  CustomLog -
  
  
  
  <feed>
  
      File /tmp/feed1.ffm
  
      FileMaxSize 200K
  
      ACL allow 127.0.0.1
  
  </feed>
  
  
  
  <stream>
  
      Feed feed1.ffm
  
      Format ogg
  
      AudioBitRate 64
  
      AudioChannels 1
  
      AudioSampleRate 44100
  
      NoVideo
  
  </stream>
  
  
  
  <stream>
  
      ACL allow localhost
  
      ACL allow 192.168.0.0 192.168.255.255
  
  </stream>
  
  
  
  <redirect>
  
      URL http://www.libav.org/
  
  </redirect>

  the command I use :

  avconv -i http://some_stream_service?format=flv -acodec mp3 http://localhost:8090/feed1.ffm

  console output :

  avconv version 9.13-6:9.13-0ubuntu0.14.04.1+fdkaac, Copyright (c) 2000-2014 the Libav developers
  
    built on May 10 2014 17:26:31 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  
  [flv @ 0x126e020] max_analyze_duration reached
  
  Input #0, flv, from 'http://some_stream_service?format=flv':
  
    Metadata:
  
      encoder         : Lavf52.87.1
  
    Duration: 00:00:00.00, start: 0.000000, bitrate: N/A
  
      Stream #0.0: Audio: aac, 44100 Hz, stereo, fltp, 31 kb/s
  
  Output #0, ffm, to 'http://localhost:8090/feed1.ffm':
  
    Metadata:
  
      encoder         : Lavf54.20.4
  
      Stream #0.0: Audio: libmp3lame, 44100 Hz, stereo, fltp
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (aac -> libmp3lame)
  
  Press ctrl-c to stop encoding
  
  size=    1080kB time=66.14 bitrate= 133.8kbits/s 

  It looks like working, but I keep getting 0 bytes on web page http://localhost:8090/test1.ogg. Does anybody have ideas what I’m doing wrong ?