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• DIY video file streaming from linux/osx to iOS devices

  27 septembre 2016, par sfactor

  This is for a hobby project. I want to learn about video streaming and also create something that’s useful for me as well.

  The project should be able to run a server on my macbook and a client on my iPad that will allow me to watch the videos I’ve got stored on my laptop without having to copy them in my iPad over my wifi.

  I know there are solutions like Plex, Air Video etc. that allow me to do it. But since my goal is to practice writing some client/server code, I want to create something myself with the basic functionality of these apps.

  I figured I’d probably need something like ffmpeg and Apple’s HTTP Live Streaming (HLS), but I don’t have a Apple developer account to be able to use it. I do have Xcode in my mac. So, some free 3rd party library for HLS or something equivalent. I also fond this tool called https://www.bento4.com.

  How would I go about getting started with such an application and what are the libraries I could use to accomplish this ?

• Youtube-dl and Shell speed

  7 août 2016, par JJ The Second

  So I’ve been experimenting with youtube-dl on Ubuntu 14 recently and I should say downloading is well fast even I have a 1GB Ubuntu LAMP but when it comes to triggering FFMPEG and deleting process hangs for a good time. Even worked with -k but as soon as FFMPEG process is completed, it takes time to respond. I do understand this is a big subject but I’d really like to hear your thoughts, what amazes me is how a website like thisis running in less than a second ? Here is what I have,

  [youtube] UxxajLWwzqY: Downloading webpage
  
  [youtube] UxxajLWwzqY: Downloading video info webpage
  
  [youtube] UxxajLWwzqY: Extracting video information
  
  [info] Writing video description metadata as JSON to: /var/www/html/download/Icona Pop - I Love It (feat. Charli XCX) [OFFICIAL VIDEO].info.json
  
  [download] Destination: /var/www/html/download/Icona Pop - I Love It (feat. Charli XCX) [OFFICIAL VIDEO].m4a
  
  [download] 100% of 2.73MiB in 00:00
  
  [ffmpeg] Correcting container in "/var/www/html/download/title.m4a"
  
  [ffmpeg] Destination: /var/www/html/download/title.mp3
  
  Deleting original file /var/www/html/download/title.m4a (pass -k to keep)

  youtube-dl "http://www.youtube.com/watch?v=UxxajLWwzqY" --write-info-json  --extract-audio --audio-format mp3  -o "/var/www/html/download/%(title)s.%(ext)s"

  I really don’t understand how this is done so fast ? Is there anything I’m missing ?

  Thanks for your time.

• Wowza RTMP to RTSP

  3 août 2016, par Nmas

  We’re using a Raspicam to stream live video to a client using Wowza Streaming Engine. We use FFMPEG to encode and send to Wowza and we can succesfully watch the RTMP stream using JWPlayer. This is the FFMPEG command used :

  ffmpeg -t 0 -s 320x240 -f video4linux2 -i /dev/video0 -b:v 250k -tune zerolatency -preset ultrafast -f flv -r 15 rtmp://wowzaaddress:1935/live/live

  To be able to watch the stream on mobile devices we want to use RTSP or HLS which Wowza provides links to, however when we use those links (provided on the Test Player) nothing happens and we can’t even open them to test for example in VLC. We have already added the extra ports on our web server to see if that was the problem and still didn’t work.
  Does anybody know what the problem is or what could we be doing wrong ?