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• FFmpeg doesn't work in Rails 3 app with Apache and Passenger in GoDaddy CentOS

  29 décembre 2011, par pablo89

  I try to upload a .mp4 video file, and it works ; I made a Bash script that calls ffmpeg in order to get the thumbs of the video. It works fine in localhost, but when I uploaded the project to a dedicated server in GoDaddy with CentOS it doesn't work, it doesn't create the thumbnails, and it shows no error. The Rails App is running under Apache with Passenger. I have tried everything, even I gave 0777 permissions to the action and to the Bash script, but nothing, it doesn't show any error, but it doesn't work.

  This is the action in Rails (as you can see, I use the commands system and exec) :

  def create
  
    if !params[:video][:video].nil?
  
      videoName = params[:video][:video].original_filename.gsub(/\s/,'_') 
  
      @video = Video.new({:title => params[:video][:title], :video => "/worshipvideos/#{videoName}"})
  
    else
  
      @video = Video.new({:title => params[:video][:title]})
  
    end
  
  
  
    if !params[:video][:video].nil?
  
      tmp = params[:video][:video].tempfile
  
      file = File.join("public/worshipvideos", videoName)
  
      FileUtils.cp tmp.path, file
  
      FileUtils.rm tmp
  
    end
  
  
  
    respond_to do |format|
  
      if @video.save
  
        if !params[:video][:video].nil?
  
          logger.debug "./createVideoPics.sh '#{videoName}'"
  
          fork do
  
            system("./createVideoPics.sh '#{videoName}'")
  
            #exec("./createVideoPics.sh '#{videoName}'")
  
          end
  
  
  
          @video.update_attribute("pic1", "worship_pics/#{videoName}_1.jpg")
  
          @video.update_attribute("pic2", "worship_pics/#{videoName}_2.jpg")
  
          @video.update_attribute("pic3", "worship_pics/#{videoName}_3.jpg")
  
        end
  
  
  
        format.html { redirect_to @video, notice: 'Video was successfully created.' }
  
        format.json { render json: @video, status: :created, location: @video }
  
      else
  
        format.html { render action: "new" }
  
        format.json { render json: @video.errors, status: :unprocessable_entity }
  
      end
  
    end
  
  end

  This is the script in Bash :

  #!/bin/bash
  
  chmod 0777 "public/worshipvideos/$1"
  
  ffmpeg -i "public/worshipvideos/$1" -an -ss 00:00:20 -r 1 -vframes 1 -f mjpeg -y "app/assets/images/worship_pics/${1}_1.jpg"
  
  ffmpeg -i "public/worshipvideos/$1" -an -ss 00:00:40 -r 1 -vframes 1 -f mjpeg -y "app/assets/images/worship_pics/${1}_2.jpg"
  
  ffmpeg -i "public/worshipvideos/$1" -an -ss 00:01:00 -r 1 -vframes 1 -f mjpeg -y "app/assets/images/worship_pics/${1}_3.jpg"
  
  echo "End of making thumbs"

  If I try to make the command in terminal ./createVideoPics.sh "abc.mp4" it works, it makes the thumbs ; it only doesn't work inside the Rails App.

  What do you think would be the problem ? thanks in advance

• live streaming video file from iphone to internet using FFMpeg

  18 avril 2014, par Luis Mok

  i am trying to live streaming some video content from iphone to the internet (or server). I have read the following post (http://stackoverflow.com/questions/4084811/iphone-http-live-streaming-without-any-server-side-processing)

  And i understand i can first capture the images and audio into file then send it out to the internet. But i really have no idea how to start the work on constantly send out these video files.

  I understand i can use ffmpeg to do the streaming part. after long researching i can only found a sample program called iFrameExtractor using FFmpeg library. But the sample only shows how to use ffmpeg to playback a video file, but no sample on how to use the live streaming function in ffmpeg...

  Can anyone provide a direction or tutorial how to live streaming a video file using ffmpeg ? or anyone can suggest other ways to solve this problem ? i am sure lots of people want to know how to do that.

• Unable to execute CLI commands through PHP

  13 janvier 2012, par user940154

  OS : ubuntu 11.10
  Webserver : Apache
  Code : PHP
  I am trying to display the output of command "ffmpeg -i " on the webpage using php.
  Required : The webpage should show the information about video (text).
  Whats happening : The webpage shows no text output on running the php code.
  If I was however doing system("ls") the code runs fine and outputs the list of files.
  Here's my code

  <?php
  
   echo "Details of video file:";
  
   system('ffmpeg -i /home/atish/Videos/T2V0040006_Angled_ride_720x576i_FLDCMB.avi');
  
  ?>

  The same command works fine on my shell, and my system has ffmpeg installed. Here's a snapshot of executing this command directly on shell :

  ThinkPad-T420:~/Videos$ ffmpeg -i /home/xx/Videos/T2V0040006_Angled_ride_720x576i_FLDCMB.avi
  
  ffmpeg version git-2012-01-10-7e2ba2d Copyright (c) 2000-2012 the FFmpeg developers
  
  built on Jan 10 2012 12:01:19 with gcc 4.6.1
  
  configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-    amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree --enable-postproc --enable-version3 --enable-x11grab
  
    libavutil      51. 34.100 / 51. 34.100
  
    libavcodec     53. 54.100 / 53. 54.100
  
    libavformat    53. 29.100 / 53. 29.100
  
    libavdevice    53.  4.100 / 53.  4.100
  
    libavfilter     2. 58.100 /  2. 58.100
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0.  6.100 /  0.  6.100
  
    libpostproc    51.  2.100 / 51.  2.100
  
    Input #0, avi, from '/home/atish/Videos/T2V0040006_Angled_ride_720x576i_FLDCMB.avi':
  
    Metadata:
  
    encoder         : Lavf52.23.1
  
    Duration: 00:00:29.00, start: 0.000000, bitrate: 124422 kb/s
  
    Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 720x576, 25 tbr, 25 tbn, 25 tbc
  
    At least one output file must be specified

  I have tried appending "DISPLAY=:0" to my command and also done "xhost +" before running php code, but nothing is helping me out.

  Thanks.