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• 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 ?

• 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 HLS Live Stream Stuck with iOS 11

  1er novembre 2017, par Lamorun

  I’ve exp with FFmpeg but i recent problem with iOS 11 (Recent release for Apple)

  I used FFmpeg for stream HLS Live Stream for only iPhone and iPad in closed app for online courses. My problem is the next :

  I used this code for HLS Live Stream :

  ffmpeg -i "Input" -preset fast -c:v libx264 -c:a aac -ac 1 -strict -2 -crf 18 -profile:v baseline -maxrate 1000k -bufsize 1835k -pix_fmt yuv420p -b:a 64k -flags -global_header -hls_time 20 -hls_list_size 6 -hls_wrap 10 -start_number 1 /m3u8/test.m3u8

  This work perfect in iOS 8, 9 and 10 devices. But with new version iOS 11, video is stuck after about 30 to 40 seconds, as seen in the image :

  ios11stuck

  I have searched for hours and hours. I have done many tests, but I can not get it out, since it works perfectly with iOS 8,9 and 10 (test in somes devices, even working perfectly on a device with iOS 10, update to iOS 11, and stop working immediately, downgrade to iOS 10 and work again)

  I hope someone can help me out, thank you and greetings to all