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• RTSP/RTMP Video Streaming Client iOS [closed]

  28 mai 2015, par nathansizemore

  I’m in need of a open source solution/library to stream RTSP/RTMP to an iOS Application. I need to build an app that connects to a media server, and opens the provided video stream. I believe there has to be libraries out there, but I have yet to find one that is open source, compiles, actually works, and runs on iOS 5+, iPhone 4+. I do not have a preference, RTMP or RTSP will suffice. Preferably the one with the least amount of work. I have RTSP working on the Android side, but nothing for iOS yet.

  This is what I already know from research today -

  RTSP

  • Seems possible using Live555/FFMPEG
  • MooncatVenture Group - Old FFMPEG, not compatible with ARMv7s (No updates/blogs/commits in over a year)
  • DFURTSPPlayer - This is a working example.

  RTMP

  • Seems possible using Live555/FFMPEG
  • A few libraries are out there for data messaging, but that is all
  • MidnightCoders Project - Does not seem video support is build yet, as Audio is not.

  I’ve never messed with anything video related before, so encoding, frame rate, key frame, chunks, etc... is pretty foreign to me. Right now, it seems building a static binary from Live555/FFMPEG is the only solution to my problem. If so, can anyone give me a simple quickstart guide or links to a blog/example someone has out there ? I’m not looking for anything crazy, just a simple

  1. Download This - LINK
  2. Compile it like this - LINK
  3. Place it into X Folder in Xcode
  4. Create X Object
  5. Read Stream API here - LINK

  If not, anyone want to point me to a working open source library ?

  Oh yeah, this happens to be my first iPhone app and first time in Objective-C. Awesome first project, yeah ?

• FFMPEG Streaming Output Dropping On Virtual Server

  11 octobre 2017, par David Childers

  I am currently using FFMPEG to stream on a virtual CENTOS server. I use the following script to stream to youtube live.

  ffmpeg -re -i program.01.mp4 -flags +global_header -acodec libmp3lame -ac 1 -ar 44100 -ab 192k -s 1280x720 -vcodec libx264 -pix_fmt yuv420p -g 60 -vb 1700k -profile:v baseline -preset:v faster -r 30 -f flv "rtmp://a.rtmp.youtube.com/live2/xxxxx"

  I previously used the very same FFMPEG stream script to stream on a dedicated CENTOS server for over a year, with no technial issues.

  I tried to use the very same FFMPEG script on the virtualized server. When I use 1700k encoding speed - I get the following error in the output :

  [flv @ 0x56da380] Failed to update header with correct duration.
  [flv @ 0x56da380] Failed to update header with correct filesize.

  The youtube ingestor also complains that the input stream (coming from the CENTOS server) is slow and that the stream will buffer.

  I have checked the available output bandwidth that virtual CENTOS server has access to.

  • Download : 57.12 Mbit/s
  • Upload : 96.57 Mbit/s

  I am forced to use a much lower video encoding speed and output size

  ffmpeg -re -i program.01.mp4 -f-flags +global_header -acodec libmp3lame -ac 1 -ar 44100 -ab 128k -s 640x360 -vcodec libx264 -pix_fmt yuv420p -g 60 -vb 425k -profile:v baseline -preset:v faster -r 30 -f flv "rtmp://a.rtmp.youtube.com/live2/xxxxx"

  I am at a loss to understand what the problem could be since I have access to more than enough required bandwidth.

• Game Music Appreciation

  16 juillet 2012, par Multimedia Mike — Game Hacking

  A little over a year ago, I was prototyping a method to leverage Google Chrome’s Native Client technology in order to play old chiptunes (video game music) directly in a web browser. The last time I posted on the matter, I said that I might have something ready for public consumption by the time Google Chrome 21 rolled around. I thought I was being facetious but I wasn’t too far off. Chrome 20 is the current release version as I write this.

  Anyway, I did it : I created a chiptune music player in Native Client by leveraging existing C/C++ libraries such as Game Music Emu, Audio Overload SDK, and Vio2sf. Then I packaged up the player into into a Google Chrome extension and published it on the Chrome Web Store. Then I made a website cataloging as many chiptunes as I could find for 7 different systems :

  http://gamemusic.multimedia.cx/
  

  Check it out if you have any affinity for old game music or you want to hear how music was made using a limited range of bleeps and bloops. Thus far, the site catalogs NES, SNES, Game Boy, Nintendo DS, Genesis, Saturn, and Dreamcast songs. I’m hoping to add support and catalogs for many more systems, though, eventually bringing support in line with the Chipamp plugin for Winamp.