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• What kind of streaming protocol is the following technique of FFMPEG and HTML Video tag ?

  29 avril 2022, par O Connor

  Many people were looking for live streaming solution on a web page. I want to share the following knowledge after doing so many researches and having spent so many time.

  


  Run the following command line.

  


  ffmpeg -y -rtsp_transport udp -i "my_rtsp_url" -vcodec libx264 -listen 1 -movflags isml+frag_keyframe -f mp4 http://ip_address:port_nr/test.mp4


  


  Add the following HTML video tag to your web page.

  


  <video controls="controls" autoplay="autoplay">&#xA;    <source src="http://ip_address:port_nr/test.mp4" type="video/mp4">&#xA;</source></video>&#xA;

  


  Now you can start live-streaming on your web page.

  


  My question :

  


  In general for a video playback, the browser loads the whole video file test.mp4 first and then just starts playing the video.

  


  With the above technique, how can FFMPEG keep pushing video frames to the video source of the HTML without having a complete video file first ?

  


  Or

  


  Video source of the HTML keeps pulling frames from the FFMPEG server ?

  


  Does anyone know how it works ? I am not looking for a streaming solution. I want to understand how these two work together ?

  


• copy step written on stackoverflow to install FFMPEG on wamp not working

  18 novembre 2016, par user3833682

  I’m working on project for converting youtube videos into mp3 format and found this also to install ffmpeg on wamp server Install FFMPEG on WAMP and try other links also but ffmpeg extension is not installing so I also checked it at phpinfo to confirm its installed or not but not installed and I’ve windows 7 64, wampserver 2.4, apache 2.4.4 and php version is 5.4.12 I don’t know what am I missing, I spent my 6 hours to figure out but extension of ffmpeg is not installed yet please tell me what am I doing wrong ?

  Now after that I’m getting popup message twice when I start wamp server `PHP Startup : Unable to load dynamic library

  c :/wamp/bin/php/php5.4.12/ext/php_ffmpeg.dll’ - %1 is not a valid
  Win32 application.

  

• linphone on windows building error

  21 novembre 2013, par chhameed

  i have downloaded the linphone for Android from Github.
  i have also followed all the instructions in readme file. the problem is that when i run ndk-build command it produce below error .

  Android NDK: ERROR:jni/..//submodules/externals/build/ffmpeg/Android.mk:avutil-linphone: LOCAL_SRC_FILES points to a missing file
  
  Android NDK: Check that jni/..//submodules/externals/build/ffmpeg/arm/libavutil/libavutil-linphone-arm.so exists  or that its path is correct
  
  /cygdrive/c/development/android-ndk-r9b/build/core/prebuilt-library.mk:45: *** Android NDK: Aborting    .  Stop.

  what this error mean ? & how can i resolve this? i already spent many hours to searchout this error but no success...
  my OS is window 7 & i used cygwin for commands.

  i have found same question on SO
  Android NDK error when using FFmpeg in Android ?

  it says Basically problem was with ffmpeg lib.I was not able to compile ffmpeg lib on Windows 7. I switched to Ubuntu & tried AppUnite & after spending so many hours it was working.

  is it not possible to build linphone on windows ???