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• Heroku ffmpeg buildpack

  20 octobre 2015, par Manuel Quintanilla

  Putting together the video upload section in my rails app and am having some issues with video play on mobile phones. Im using

  paperclip-av-transcoder, s3 and  Heroku

  On my laptop I can visit the page and see the video thumbnails and play the videos only because I have previously installed ffmpeg to my machine.

  Remotely on Heroku I’ve set the appropriate buildpacks for ffmpeg and have run push heroku master to install the buildpacks - Now when I visit the page on my mobile iPhone I don’t get a thumbnail but when I play the video it plays - on the other hand when I visit the page on my Android phone I don’t get a thumbnail and the video dose not play but I can upload mp4s on Android.

  Check out my set up here : Heroku ffmpeg buildpacks for video uploads

  It seems I don’t have the proper buildpack setup or some other heroku setting with ffmpeg.

  Any suggestions ? Thanks in advance !

• ffmpeg - Audio not playing on iOS with transcoded video

  23 juin 2015, par Dev

  I am using Laravel 4.2.

  I am working on a project that provides video services. To transcode video (to play on all devices) I’ve used git-hub package php ffmpeg.

  By transcoding video, I found it is NOT working with iPhone 5s. I searched for solution and found some changes in parameters passed to the library.

  Finally, I come up with the command below that the library uses to transcode the video.

  ffmpeg -y -i video.mp4 -async 1 -metadata:s:v:0 start_time=0 -s 560x320 
  
      -vcodec libx264 -strict experimental -pix_fmt yuv420p -profile:v baseline 
  
      -acodec aac -profile:a aac_low -b:v 466k -refs 6 -coder 1 -sc_threshold 40 
  
      -flags +loop -me_range 16 -subq 7 -i_qfactor 0.71 -qcomp 0.6 -qdiff 4 
  
      -trellis 1 -b:a 256k -ac 2 transcode_video.mp4

  The video is playing well but the audio is NOT working on iOS. Hence the video is playing without audio. I am using HTML 5 player to play the video and auto play option is off.

  Any suggestions ?

• ffmpeg does not copy custom metadata

  20 juin 2015, par e110c0

  I’m trying to fix some videos made with an iDevice. The videos have a rotation in the metadata which is only understood by Apple and its software but noone else. Fixing this is quite simple, but I also would like to keep the other metadata in the files like the geolocation.

  I tried a couple of versions, all with the same result, e.g. :

  ffmpeg -i input.mov -vf vflip,hflip -map_metadata 0 -metadata:s:v:0 rotate=0  -acodec copy output.mp4

  This should work, it already gives the correct preview of metadata :

  ffmpeg version 1.1.2 Copyright (c) 2000-2013 the FFmpeg developers
  
  built on Feb  8 2013 23:55:22 with Apple clang version 4.0 (tags/Apple/clang-421.0.60) (based on LLVM 3.1svn)
  
  configuration: --prefix=/usr/local/Cellar/ffmpeg/1.1.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --cc=cc --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid
  
  libavutil      52. 13.100 / 52. 13.100
  
  libavcodec     54. 86.100 / 54. 86.100
  
  libavformat    54. 59.106 / 54. 59.106
  
  libavdevice    54.  3.102 / 54.  3.102
  
  libavfilter     3. 32.100 /  3. 32.100
  
  libswscale      2.  1.103 /  2.  1.103
  
  libswresample   0. 17.102 /  0. 17.102
  
  libpostproc    52.  2.100 / 52.  2.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2013-02-17 00.39.36.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 0
  
      compatible_brands: qt  
  
      creation_time   : 2013-02-16 23:39:25
  
      model           : iPhone 5
  
      model-deu       : iPhone 5
  
      encoder         : 6.1
  
      encoder-deu     : 6.1
  
      date            : 2013-02-17T00:39:25+0100
  
      date-deu        : 2013-02-17T00:39:25+0100
  
      location        : +48.2683+007.7205+172.710/
  
      location-deu    : +48.2683+007.7205+172.710/
  
      make            : Apple
  
      make-deu        : Apple
  
    Duration: 00:00:09.67, start: 0.000000, bitrate: 16764 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 16696 kb/s, 24 fps, 24 tbr, 600 tbn, 1200 tbc
  
      Metadata:
  
        rotate          : 180
  
        creation_time   : 2013-02-16 23:39:25
  
        handler_name    : Core Media Data Handler
  
      Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 61 kb/s
  
      Metadata:
  
        creation_time   : 2013-02-16 23:39:25
  
        handler_name    : Core Media Data Handler
  
  w:1920 h:1080 pixfmt:yuv420p tb:1/600 fr:24/1 sar:0/1 sws_param:flags=2
  
  [libx264 @ 0x7fc248829a00] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
  
  [libx264 @ 0x7fc248829a00] profile High, level 4.0
  
  [libx264 @ 0x7fc248829a00] 264 - core 125 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - 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=6 lookahead_threads=1 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 'output.mp4':
  
  Metadata:
  
    major_brand     : qt  
  
    minor_version   : 0
  
    compatible_brands: qt  
  
    creation_time   : 2013-02-16 23:39:25
  
    model           : iPhone 5
  
    model-deu       : iPhone 5
  
    encoder-deu     : 6.1
  
    date            : 2013-02-17T00:39:25+0100
  
    date-deu        : 2013-02-17T00:39:25+0100
  
    location        : +48.2683+007.7205+172.710/
  
    location-deu    : +48.2683+007.7205+172.710/
  
    make            : Apple
  
    make-deu        : Apple
  
    encoder         : Lavf54.59.106
  
  Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1920x1080, q=-1--1, 12288 tbn, 24 tbc
  
  Metadata:
  
    handler_name    : Core Media Data Handler
  
    creation_time   : 2013-02-16 23:39:25
  
    rotate          : 0
  
  Stream #0:1(und): Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, mono, 61 kb/s
  
  Metadata:
  
    creation_time   : 2013-02-16 23:39:25
  
    handler_name    : Core Media Data Handler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> libx264)
  
    Stream #0:1 -> #0:1 (copy)

  But the resulting file keeps only some of these metadata tags :

  ffmpeg -i output.mp4

  shows :

  fmpeg version 1.1.2 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Feb  8 2013 23:55:22 with Apple clang version 4.0 (tags/Apple/clang-421.0.60) (based on LLVM 3.1svn)
  
  configuration: --prefix=/usr/local/Cellar/ffmpeg/1.1.2 --enable-shared --enable-pthreads -  -enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --cc=cc --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid
  
  libavutil      52. 13.100 / 52. 13.100
  
  libavcodec     54. 86.100 / 54. 86.100
  
  libavformat    54. 59.106 / 54. 59.106
  
  libavdevice    54.  3.102 / 54.  3.102
  
  libavfilter     3. 32.100 /  3. 32.100
  
  libswscale      2.  1.103 /  2.  1.103
  
  libswresample   0. 17.102 /  0. 17.102
  
  libpostproc    52.  2.100 / 52.  2.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
  
  Metadata:
  
    major_brand     : isom
  
    minor_version   : 512
  
    compatible_brands: isomiso2mp41
  
    creation_time   : 2013-02-16 23:39:25
  
    date            : 2013-02-17T00:39:25+0100
  
    encoder         : Lavf54.59.106
  
  Duration: 00:00:09.67, start: 0.000000, bitrate: 3286 kb/s
  
    Stream #0:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 3219 kb/s, 24 fps, 24 tbr, 12288 tbn, 24 tbc
  
    Metadata:
  
      creation_time   : 2013-02-16 23:39:25
  
      handler_name    : VideoHandler
  
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 61 kb/s
  
    Metadata:
  
      creation_time   : 2013-02-16 23:39:25
  
      handler_name    : SoundHandler

  I also tried to add the one tag I’m interested in by hand with

  -metadata:g location=+48.2683+007.7205+172.710/

  with no change in the result.

  Output as .mov doesn’t change anything, neither.

  Is there any trick to add non-standard metadata ? How do I get the location back in there ?

  Thanks in advance to anyone who can give some insight on this.