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• Android libraries for ffmpeg + stagefright. language c++

  10 décembre 2017, par Serhii Skytyba

  I’v making cross-platform program in c++. In my program for Android platform i need video decoding hw acceleration. I have found out, that I need to look in libstagefright.cpp. which contains ffmpeg library. There I have found next includes :

  #include <binder></binder>ProcessState.h>
  
  #include <media></media>stagefright/MetaData.h>
  
  #include <media></media>stagefright/MediaBufferGroup.h>
  
  #include <media></media>stagefright/MediaDebug.h>
  
  #include <media></media>stagefright/MediaDefs.h>
  
  #include <media></media>stagefright/OMXClient.h>
  
  #include <media></media>stagefright/OMXCodec.h>
  
  #include <utils></utils>List.h>

  Also, I found out that the source code of these headers is here : https://android.googlesource.com . But I can’t understand in which way to build them. So, my question is : Where can i get these libraries or how can get the source code, that i need to build ? Also, I look for advice which way I can better use Android video decoding hw acceleration + ffmpeg.

• Which Platform/Language to choose for Video Management System [closed]

  5 décembre 2019, par Vivek Buddhadev

  We have started on a new project, Which enables for the multiple IP cameras(Around 1000 Cameras) to record as well as available for live streaming.

  Like https://www.security.honeywell.com/uk/product-repository/maxpro-vms

  Initially, we have tried using ffmpeg commands that saves data in chunks :

  ffmpeg -i {rtsp_url} -fflags flush_packets -max_delay 2 -flags -global_header \
  
      -hls_time 2 -hls_list_size 3 -vcodec copy -y /var/www/html/Cam01.m3u8

  Then we have started http server and using node.js we are displaying the stream.

  But as we are adding more cameras into it, the performance is going down.

  Kindly suggest if there is any other way to achieve this functionality which help us to fulfill the above requirement.

• Freeze frames at a time on videos and slow down videos

  24 avril 2020, par Nguyễn Trọng

  Suppose I have an mp4 video with a duration of 60 seconds.

  



  I want to freeze 1 frame at the 10th second and 40th second and then extend them to about 3 seconds.
At the same time I want to increase the speed of the video to 2 times from the 1 to 20 seconds and 2 times the video slow from 30 to 60 seconds.
The video output I received was 3 + 3 + (20 - 1) * 2 + (30 - 20) + (60-30) * 2 = 108 seconds
Is there a way to do it in one statement ?

  



  Thank in advance and sorry for my bad english.