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• Live stream PowerPoint + Video - ffmpeg ? [on hold]

  21 novembre 2016, par Mango

  I’m in the unenviable position of needing to live stream a seminar with one video camera and PowerPoint. We need to switch between the video and PowerPoint at arbitrary times. The switch need not be fancy like a dissolve, and in fact it can take up to three seconds. The audio however must remain uninterrupted and must be synced with both video streams.

  I had the idea of creating a batch file with two ffmpeg commands : one that captured the desktop, and one that captured video from the camera. ffmpeg pushes the video to a local UDP port. Then, it loops.

  A separate ffmpeg process receives the local stream and pushes it to an RTMP server. All I have to do to switch video sources is kill the first ffmpeg.

  This works for video, but I haven’t figured out how to get the audio to sync.

  I’m aware of expensive video production software that provides this sort of thing as a service, but I thought I would see if I could do it open source if possible.

  Any suggestions would be appreciated.

• automatically run script recording video at interval using command line and ffmpg

  29 décembre 2014, par arrie

  I’m really a beginner noob newbie command line noob. But. I’m trying to create a script that automatically starts my isight camera when turning on my mac laptop. It should create clips of about 5 seconds at an interval of 5 hours or so. (These numbers I can change of course later on if I have the basis for my script).

  So what I in fact need is (i think) a launch script, that launches a video recording script.

  Right now I’m as far as my video recording script, which is not finished : camera.sh

  #!/bin/bash
  
  
  
  FNAME=videocapture_`date +"%F_%H_%M"`.mpg
  
  echo $FNAME
  
  
  
  ffmpeg -f -t "0.20avfoundation -i "" $FNAME

  ---

  This in fact records a video when I play the script in the command line, until I tell it to quit. These videos are then named according to the date etc. But of course I want it to automatically record videos, in an already determined duration. And I just can’t seem to figure out how to make it happen. I come back to different kind of scripts using isight capture, which in fact doesn’t seem to exist anymore, and even so, I would like to stay with my own basis script just because I understand it haha.

  Hopefully someone here can help me figure this out ! Much appreciated :) Thanks !

• Build ffmpeg for android in smaller size with specific features

  13 juillet 2021, par Anas Ansari

  I am using this command to trim out segments of a video in android app using ffmpeg

  


  -ss startFrom -i inputVideo-f segment-segment_time durationOfEachSegment -reset_timestamps 1 outputPath

  


  For this I am using this library https://github.com/tanersener/ffmpeg-kit/tree/development/android

  


  But it has increased my app size a lot

  


  I already tried deleting x86 lib and it indeed decreased my app from 60 mb to 34 mb , but i know still it can be decreased to a much extent

  


  I want to know how to build ffmpeg library with enough features to fullfil my needs and which libraries i need to include in my build