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• How do I convert RTSP stream for iOS browser viewing

  6 mars 2017, par humble_coder

  TL ;DR

  I need to convert full RTSP (A/V) stream from Axis IP cameras to be viewed in a fully-contained/not-full-screen div in an iOS browser. Think : "Youtube live stream as viewed from iOS browser". I’ve seen several links that hint at the issue. . .

  • Streaming via RTSP or RTP in HTML5
  • RTSP tunneled HTTP, FFMPEG
  • How can I display an RTSP video stream in a web page ?
  • Embed RTSP Stream into Browser

  . . .but they’re either "incomplete" or out of date.

  The solution must be local and remain behind site firewall (so no external services).

  MORE DETAIL

  I’m currently writing a custom "Axis IP Camera Manager" Vue/Laravel web app for a client. The initial requirements were very simple :

  1. scan network for axis devices and store addresses/info for future use

  2. display grid of MJPEG for selected camera(s).

  The initial requirements were fairly straightforward. Now, though, there are additional requirements :

  3. Record RTSP stream to [seconds] long MP4 streams.

  4. Convert an RTSP stream from AXIS IP CAMERA to something viewable in both desktop and mobile browsers with full A/V.

  I’ve successfully managed #3 by using ffmpeg to capture and store the stream to MP4. However, I’m no video aficionado, and the nature of #4 is still a bit fuzzy to me. Per my understanding I can’t watch RTSP streams in a browser in iOS, but I also can’t stream an "in-process" MP4 over HTTP. I’ve seen references to several items such as Red5, Live555, Wowza, ffserver (discontinued ?), etc. but I’m completely unfamiliar with them. In the short term, I’m looking for a quick "live" conversion solution. In the long term, I’m interested in a deeper understanding of the issue(s) at hand. Any current info/expertise/links/manuals would be appreciated.

• Append video files of different width, height

  28 novembre 2013, par Jatin

  I am building an application where user can record a screencast. Integral part of application is that, one can pause recording and resume it later any time (the session is maintained on server side).

  So say when user starts recording the screen, the width and height is :1024*768. Using xuggler (java wrapper for ffmpeg), I am able to generate a video. But say later he is on a different system and wishes to resume screen cast, then resolution changes to 1080 * 720. At this stage, I record it seperately and then try merging two files. But because the width & height are not same, I get the below exception :

  16:38:03.916 [main] WARN com.xuggle.xuggler - Got error : picture is
  not of the same width as this Coder
  (../../../../../../../csrc/com/xuggle/xuggler/StreamCoder.cpp:1430)
  Exception in thread "main" java.lang.RuntimeException : failed to
  encode video

  What is the best way to solve this Issue. The user can be on screen with different width and height. How do I merge (or any other alternatives, probably append) video files of different width and height ?

• libavformat/rtpdec : fix issue with conversion from unsigned to signed

  20 février 2015, par Gilles Chanteperdrix

  libavformat/rtpdec : fix issue with conversion from unsigned to signed
  When receiving an RTCP packet, the difference between the last RTCP
  
  timestamp and the base timestamp may be negative. As these timestamps
  
  are of the uint32_t type, the result becomes a large integer. Cast
  
  the difference to int32_t to avoid this issue.
  The result of this issue is very large start times for RTSP
  
  streams, and difficulty to restart correctly after a pause.
  Signed-off-by : Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavformat/rtpdec.c