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• How to record (and process ?) a video that is streamable from Android

  13 mai 2016, par afollestad

  My company’s app relies heavily on video recording and playback of web-based videos. I use the MediaRecorder API to record videos, through this library designed by me : https://github.com/afollestad/material-camera.

  For playback, I use this library which is basically a wrapper around Google’s ExoPlayer library : https://github.com/brianwernick/ExoMedia.

  It works fine for the most part with small videos, especially if I decrease bit rates for audio and video. However, larger and higher quality videos have many issues. Sometimes they seem to buffer forever, sometimes playback doesn’t even start successfully, etc. Again, these videos are being streamed over HTTP from Amazon S3.

  ---

  I’ve read a little bit about FFMPEG, and how it can process MP4’s for "faststart", splitting the files into chunks for DASH, etc. However, FFMPEG solutions for Android seem a bit complex, so...

  Is there anyway to record MP4’s from Android, with MediaRecorder, MediaCodec, or some other API which results in a video file that is fast to stream ? It amazes me how well Snapchat has figured this out.

• rails streamio-ffmpeg does not find uploaded video files

  26 avril 2016, par Felix

  I try to make a screenshot as thumbnail of a movie while uploading.

  My code looks like this at the moment

  require 'rubygems'
  
  require 'streamio-ffmpeg'
  
  
  
   def uploadMovie
  
     @channels = Channel.all
  
     @vid = Movie.new(movies_params)
  
  
  
     @channel = Channel.find(params[:vid][:channel_id])
  
     @vid.channel = @channel
  
  
  
     if @vid.save
  
       flash[:notice] = t("flash.saved")
  
       movieFile = FFMPEG::Movie.new(@vid.video.to_s)
  
       screenshot = movieFile.screenshot("uploads/screenshot", :seek_time => 10)
  
       render :add
  
     else
  
       render :add
  
     end
  
   end

  But when I do this I got this error :

    No such file or directory - the file 'http://.s3.amazonaws.com/uploads/movie/video/7/2016-04-24_16.26.10.mp4' does not exist

  That should be okay because I upload the movies to Amazon S3 with carrierwave ...

  What’s going wrong in this case ?

• Execute ffmpeg in AWS ec2 instance windows

  15 janvier 2016, par Napster

  Im trying to execute ffmpeg command on amazon’s windows ec2 instance using elastic beanstalk.
  I intend to merge multiple videos into a single video using a .net application.

  I cant see the file being created in the folder, so cant confirm if ffmpeg is working. The merging is working perfectly on local deployment and i can view the merged video.
  I have configured my deployment for the required permission of file creation rights (.ebextensions) and it is working.

  Im not sure what i need to do to allow execution of ffmpeg command, and im stuck here. Ive been through the forum and found similar links related to linux but not windows.

  Being a newbie im really not sure how to proceed.
  Are there any permission/steps i need to perform to allow ffmpeg command to execute on ec2 instance. If any ? please share.

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