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• Connect external cameras to iOS and decompress to a usable form

  27 septembre 2017, par Ping Chen

  I want to create a 2 camera setup which can send 1 of the camera views out as an RTMP stream depending on the motion intensity detected. The chosen camera view can change if motion intensity on the views changes.

  I imagine that I could use an iPhone/iPad as encoding/streaming hub as well as 1 of the cameras. And connect a WiFi camera to the iPad/iPhone to feed the 2nd camera view.

  My goals for the iOS side are :

  1. Connect with a WiFi camera on the local network
  2. Decode the data and run motion intensity detection on the WiFi camera feed AND the iPhone/iPad’s own camera feed with Brad Larson’s GPUImage framework https://github.com/BradLarson/GPUImage
  3. Stream out the chosen camera view. depending on motion detected

  Larson’s GPUImage framework works with an AVCaptureSession subclass. I’m only familiar with AVFoundation objects, but am a complete noob with it comes to VideoToolbox and some of the lower level iOS video stuff. Through googling, I kind of know that VTDecompressionSession is what I’d get from the WiFi camera. I have no clue how I can manipulate that to a usable form for my purposes.

  I’ve dug through stackoverflow answers such as : https://stackoverflow.com/a/29525001/7097455

  Very informative, but maybe I don’t even know to ask the correct questions

• 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 !

• Converting jpg's to mp4 using FFmPy

  30 juin 2018, par Matt

  I have a file full of jpg images that I would like to convert into an mp4 video. I have managed to do this on the command line using

  cat path/to/pictures/%d.jpg | ffmpeg -f image2pipe -i - output.mp4

  However when I try and go about doing it via FFmPy :

  ff = ffmpy.FFmpeg(
  
  inputs={'path/to/pictures/%d.jpg': None},
  
  outputs={'output.mp4': None})
  
  
  
  ff.cmd
  
  ff.run()

  I will run into the error :

      FFRuntimeError: `ffmpeg -i path/to/pictures/1.jpg -f output.mp4` exited with status 1
  
  
  
  STDOUT:
  
  
  
  
  
  STDERR:

  I’m really not sure what the issue is here, any change I make results in the same error. Any help would be appreciated, thanks.