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• Load processed video instead of original video - Rails, Dragonfly

  1er février 2016, par Michael B

  In my Rails 4-Project, I am using Dragonfly to upload images and videos.
  For image-processing I use imagemagick, for videoprocessing I use ffmpeg.

  Videos are uploaded and stored in the folder uploads/videos. After processing, they are stored in public/ffmpeg_videos/

  My question is : How can I use the processed-video instead of the uploaded video ?

  e.g. I use this code in the view, to display a video :

  <video src="&lt;%=@video.video.url%>"></video>

  This successfully loads the original video from the upload-path. But what do I have to change, to load the video from the ffmpeg-path ?

  initializers/dragonfly.rb

  require 'dragonfly'
  
  
  
  # Configure
  
  Dragonfly.app(:images).configure do
  
    plugin :imagemagick
  
    protect_from_dos_attacks false
  
    secret 'd045734b043b4383a246c5c8daf2d3e31217dc8b030f21861e4fd16c4b72d382'
  
    url_format '/media/:job/:name'
  
  
  
    datastore :file,
  
              root_path: Rails.root.join('uploads/images/'),
  
              server_root: Rails.root.join('uploads')
  
  end
  
  
  
  Dragonfly.app(:videos).configure do
  
    secret 'd045734b043b4383a246c5c8daf2d3e31217dc8b030f21861e4fd16c4b72d382'
  
    url_format "/video/:job/:name"
  
  
  
    datastore :file,
  
              root_path: Rails.root.join('uploads/videos/'),
  
              server_root: Rails.root.join('uploads')
  
  end
  
  
  
  # Logger
  
  Dragonfly.logger = Rails.logger
  
  
  
  # Mount as middleware
  
  Rails.application.middleware.use Dragonfly::Middleware, :images
  
  Rails.application.middleware.use Dragonfly::Middleware, :videos
  
  
  
  # Add model functionality
  
  if defined?(ActiveRecord::Base)
  
    ActiveRecord::Base.extend Dragonfly::Model
  
    ActiveRecord::Base.extend Dragonfly::Model::Validations
  
  end

• Fast Video Streaming and Upload Android

  6 avril 2016, par vminind

  Fast Streaming & Uploading Videos On Mobile Apps with AWS S3

  Im developing a app witch has Android, iOS Clients were users can upload videos and photos and view as news feed. I store my video file on Amazone s3. Video length is limited to 30sec.

  When user is uploading 30 sec video from their gallery there are some high quality videos witch is even exceed 100MB so those video files take ages to upload. So i tried to convert them before upload using ffmpeg-android library but it also take almost same amount of time to convert the file so it seems this solution also point less. (convert in the scene reducing the video resolution and frame rate)

  Im using ExoPlayer to play videos

  Note : Videos uploading from iOS are not that huge files.

  I want videos to upload fast and stream fast. Its big help if anyone can share their thoughts on this.

• ffmpeg recognises MXF dv but won't encode to h264

  6 août 2017, par 3pointedit

  I have a DV file encoded as an MXF that I want to transcode to h264. Running ffmpeg against the file it reads ok and understands the stream but won’t write the h264 file. It seems to get all the streams correct and I can confirm the attributes of video and audio streams.

  I just don’t understand why it won’t encode ? I tried to force a Decoder with -f dv but it complained that the source header was incorrect.

   ./ffmpeg -f dv -i camb_onitefire_050914.mov  camb_onitefire_A.mp4
  
  ffmpeg version 3.3.1 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
  
    configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --enable-libvidstab --enable-libx265 --disable-doc --arch=x86_64 --enable-runtime-cpudetect
  
    libavutil      55. 58.100 / 55. 58.100
  
    libavcodec     57. 89.100 / 57. 89.100
  
    libavformat    57. 71.100 / 57. 71.100
  
    libavdevice    57.  6.100 / 57.  6.100
  
    libavfilter     6. 82.100 /  6. 82.100
  
    libswscale      4.  6.100 /  4.  6.100
  
    libswresample   2.  7.100 /  2.  7.100
  
    libpostproc    54.  5.100 / 54.  5.100
  
  [dv @ 0x7fd6f4800000] Cannot find DV header.
  
  camb_onitefire_050914.mov: Operation not permitted
  
  Davids-MacBook-Pro:camb_onitefire_050914(1).vmf davidmcsween$ ./ffmpeg -i camb_onitefire_050914.mov camb_onitefire_A.mp4
  
  ffmpeg version 3.3.1 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
  
    configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --enable-libvidstab --enable-libx265 --disable-doc --arch=x86_64 --enable-runtime-cpudetect
  
    libavutil      55. 58.100 / 55. 58.100
  
    libavcodec     57. 89.100 / 57. 89.100
  
    libavformat    57. 71.100 / 57. 71.100
  
    libavdevice    57.  6.100 / 57.  6.100
  
    libavfilter     6. 82.100 /  6. 82.100
  
    libswscale      4.  6.100 /  4.  6.100
  
    libswresample   2.  7.100 /  2.  7.100
  
    libpostproc    54.  5.100 / 54.  5.100
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe1fb000000] Skipped opening external track: stream 0, alias: path='/VibrintAVFiles/P2 News Ingest/camb_onitefire_050914(1).vmf/video.vid', dir='camb_onitefire_050914(1).vmf', filename='video.vid', volume='default', nlvl_from=1, nlvl_to=1.Set enable_drefs to allow this.
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe1fb000000] Skipped opening external track: stream 1, alias: path='/VibrintAVFiles/P2 News Ingest/camb_onitefire_050914(1).vmf/audio_0.pcm', dir='camb_onitefire_050914(1).vmf', filename='audio_0.pcm', volume='default', nlvl_from=1, nlvl_to=1.Set enable_drefs to allow this.
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe1fb000000] Skipped opening external track: stream 2, alias: path='/VibrintAVFiles/P2 News Ingest/camb_onitefire_050914(1).vmf/audio_1.pcm', dir='camb_onitefire_050914(1).vmf', filename='audio_1.pcm', volume='default', nlvl_from=1, nlvl_to=1.Set enable_drefs to allow this.
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe1fb000000] Skipped opening external track: stream 3, alias: path='/VibrintAVFiles/P2 News Ingest/camb_onitefire_050914(1).vmf/audio_2.pcm', dir='camb_onitefire_050914(1).vmf', filename='audio_2.pcm', volume='default', nlvl_from=1, nlvl_to=1.Set enable_drefs to allow this.
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe1fb000000] Skipped opening external track: stream 4, alias: path='/VibrintAVFiles/P2 News Ingest/camb_onitefire_050914(1).vmf/audio_3.pcm', dir='camb_onitefire_050914(1).vmf', filename='audio_3.pcm', volume='default', nlvl_from=1, nlvl_to=1.Set enable_drefs to allow this.
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe1fb000000] Could not find codec parameters for stream 0 (Video: dvvideo (dvpp / 0x70707664), none, 720x576, 28800 kb/s): unspecified pixel format
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  Guessed Channel Layout for Input Stream #0.1 : mono
  
  Guessed Channel Layout for Input Stream #0.2 : mono
  
  Guessed Channel Layout for Input Stream #0.3 : mono
  
  Guessed Channel Layout for Input Stream #0.4 : mono
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'camb_onitefire_050914.mov':
  
    Metadata:
  
      creation_time   : 2014-09-04T18:54:07.000000Z
  
    Duration: 00:17:47.18, start: 0.000000, bitrate: 1 kb/s
  
      Stream #0:0(eng): Video: dvvideo (dvpp / 0x70707664), none, 720x576, 28800 kb/s, SAR 118:81 DAR 295:162, 25 fps, 25 tbr, 2500 tbn, 2500 tbc (default)
  
      Metadata:
  
        creation_time   : 2014-09-04T18:54:07.000000Z
  
        handler_name    : Apple Alias Data Handler
  
        timecode        : 01:46:43:02
  
      Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-09-04T18:54:07.000000Z
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:2(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-09-04T18:54:07.000000Z
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:3(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-09-04T18:54:07.000000Z
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:4(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-09-04T18:54:07.000000Z
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:5(eng): Data: none (tmcd / 0x64636D74) (default)
  
      Metadata:
  
        creation_time   : 2014-09-04T18:54:07.000000Z
  
        handler_name    : Apple Handle Data Handler
  
        timecode        : 01:46:43:02
  
  File 'camb_onitefire_A.mp4' already exists. Overwrite ? [y/N] y
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (dvvideo (native) -> h264 (libx264))
  
    Stream #0:1 -> #0:1 (pcm_s16le (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  Finishing stream 0:0 without any data written to it.
  
  Finishing stream 0:1 without any data written to it.
  
  Nothing was written into output file 0 (camb_onitefire_A.mp4), because at least one of its streams received no packets.
  
  frame=    0 fps=0.0 q=0.0 Lsize=       0kB time=-577014:32:22.77 bitrate=  -0.0kbits/s speed=N/A    
  
  video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  [aac @ 0x7fe1fd010e00] Qavg: nan

  Heres an example of the file structure of this novel mxd :