Sur d’autres sites (7357)

• Creating a VOD ABR system with HLS

  19 juillet 2016, par Matteo

  I know this is a specific question but I’m new to this and have spent weeks trying to solve this problem.

  I’m creating a mobile app and need to have Video on Demand (VOD) live streaming. Right now I’m converting MP4 video files into HLS using FFMPEG and broadcasting from a server but the load time is pretty long for 3G connections (low bandwith).

  Has anyone else set up this type of system that can help ?

  It looks like I need Adaptive Bitrate Streaming (ABR) and a media server with a CDN.

  My question is - #1 - Can I get away with not using a CDN ? Or perhaps not using a "media server" but just a regular server

  2 - Is it practical to use FFPMEG to set up an ABR stream with HLS

  I know I probably wont get a response to this question but I thought it was worth a shot.

  Thanks

• FFmpeg enabling external packages 'min-gpl' in swift or Xcode steps

  2 septembre 2020, par Pranav

  I am working with FFmpeg for iOS swift and added in my project using

  


  


  pod 'mobile-ffmpeg-full', ' > 4.4'

  


  


  Whenever I try to compress and convert video using following command it fails with rc=1

  


  MobileFFmpeg.executeAsync("-i old.mp4 -c:v libx265 -crf 28 -c:a aac -b:a 128k -tag:v hvc1 new.mp4", withCallback:self)


  


  I have searched to add or enable external package 'min-gpl' for x265 to config in Xcode or pods but unable to find steps or anything related to it.

  


  Thanks in advance.

  


• Trying to grab video stream from a 802W device

  1er juin 2015, par brentil

  A group of us in the RC hobby forums had started trying to use a device called the 802W, it takes RCA in and then broadcasts it back out over a WiFi you connect to via an Android or iOS device. They’re typically used for backup camera addon systems for vehicles. We want to use it to do FPV (First Person Video/View) with using smartphones instead of buying more expensive FPV goggles.

  802W device example (plenty of clones online)

  http://www.amazon.com/Wireless-Backup-Camera-Transmitter-Android/dp/B00LJPTJSY

  The problem is you can only use their application WIFI_AVIN or WIFI_AVIN2 from the app stores to connect to it because they don’t publish the information about how to grab the stream data. We want to write our own apps that can use the stream to better show the information. We’ve tried using VLC to grab the stream from an Android phone or a Windows PC but we’ve had no success so far. I was hoping someone could look at the Wireshark outputs and might understand what they’re looking at better than I am. I "think" it’s a UDP multicast being broadcasted but I just don’t know enough to be sure. We’ve tried using VLC to connect to network streams directly on the device or from udp ://@ type addresses but I think part of the issue too might be we’re missing the file path of the stream file.

  Attempting to reverse engineer their code for learning purposes showed that ffmpeg is inside a compiled .so library which also seems to be where the actual connection code happens which we were unable to dig into.

  In the images 192.168.72.33 is my phone and 192.168.72.173 is the 802W device.

  Image of what I believe is a UDP broadcast of the video information.
  

  This is what the stream turns into when the device connects using the WIFI_AVIN application.