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• FFMPEG .mov to .mp4 convertion failure

  25 mai 2016, par Pasha Rumkin

  I’m converting .mov and .mp4 to .mp4 with FFMPEG to play them on iOS and Android devices. Mp4 from Android is converting properly and playing on both devices iPhone and Android. But iPhone’s .mov result is strange. It’s playing on iPhone and Android 4. But when I’m trying to open this video with Photo app (Android 5, 6) it outputs unsupported video message.

  FFMPEG command :

  ffmpeg -i app/data/storage/68/fa/39/68fa392b-df25-4622-93ab-cf9bf1253f63 \
  
         -y -b:a 128k -ac 2 -acodec libfdk_aac -b:v 300k -vcodec libx264 \
  
         -filter:v scale=w=320:h=trunc(ow/a/2)*2 -vprofile baseline \
  
         -movflags faststart -f mp4 \
  
         app/data/storage/68/fa/39/68fa392b-df25-4622-93ab-cf9bf1253f63.mp4

  ffprobe with output file :

  ffprobe version N-80026-g936751b Copyright (c) 2007-2016 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
  
    configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab
  
    libavutil      55. 24.100 / 55. 24.100
  
    libavcodec     57. 42.100 / 57. 42.100
  
    libavformat    57. 36.100 / 57. 36.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 45.100 /  6. 45.100
  
    libavresample   3.  0.  0 /  3.  0.  0
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '68fa392b-df25-4622-93ab-cf9bf1253f63.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.36.100
  
    Duration: 00:00:00.65, start: 0.000000, bitrate: 297 kb/s
  
      Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 320x568, 178 kb/s, 30 fps, 30 tbr, 15360 tbn (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 129 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler

• how to convert mp4 using ffmpeg for ios [on hold]

  23 août 2015, par Khaled Hayek

  I have problem to use ffmpeg for windows to convert mp4 file so that it can be played on iphone

      ffmpeg -i input.mkv -c:v libx264 -crf 28 -preset veryslow -tune fastdecode \
  
    -profile:v baseline -level 3.0 -movflags +faststart -c:a libfdk_aac -ac 2 \
  
    -ar 44100 -ab 64k -threads 0 -f mp4 output.mp4

  but still not working, any help please

• How to implement HTTP Live Streaming server on Unix ?

  11 juillet 2019, par alex

  I just realized that Apple required HTTP Live Streaming in order to view videos in iPhone apps. I was not aware of this before... I am now trying to understand what this involves so I can decide whether I want to do the work and make the videos available in 3G or limit video playing to users who are connected to wi-fi.

  I read the overview provided by Apple, and now understand that my server needs to segment and index my media files. I also understand that I don’t have to host the content to be able to stream it (I can point to a video hosted somewhere else, right ?).

  What’s not clear to me at this point is what to implement on my server (Ubuntu Hardy) to do the actual segmenting and indexing on the fly (once again, I do not host the videos I want to serve).

  I found a link explaining how to install FFmpeg and X264, but I don’t know if this is the best solution (since I have an Ubuntu server, I can’t use the Apple Live Streaming tools, is it correct ?). Also, I do not understand at which point my server knows that a video needs to be converted and starts the job...

  Any feedback that could help me understand exactly what to do on the server side to be able to stream videos on my iPhone app in 3G would be greatly appreciated ! (Oh, and just it makes any difference, my app back-end is in Rails)