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• merge two videos android

  4 juillet 2016, par Lukas

  I’m new to android, but not new to developing for mobile.

  My goal is to record two videos, and the mix it into one video using audio from both tracks. E.g two recorded videos are both 10 seconds. I want to take the first 5 seconds from the first video, and the last 5 seconds from the second video, combine them together with combined audio from both videos, and have it in an mp4 file.

  On iOS there is an AVFoundation framework, which lets you combine multiple videos and audio into one video file (h.264 codec in mp4 container). I want to achieve similar results on android, but fail miserably at finding frameworks or 3rd party libs for doing that. If anyone could help me by showing some links or any directions where to look for information it would be really helpful. Thanks in advance !

• avi encoded to streaming mp4 or webmnot playing in html5 player

  30 mai 2013, par Vprnl

  [EDIT]

  I'm trying to get ffmpeg to encode various AVI files to mp4 for streaming purposes

  I use this nodejs to start FFMPEG.

  When I try this (webm) (some settings are wrapped by the node module but produce the default FFMPEG command) with this command :

          .withVideoCodec('libvpx')
  
          .addOptions(['-bf 8','-bt 240k','-preset fast','-strict -2','-b:v 320K','-bufsize 62000', '-maxrate 620k','-movflags +empty_moov','-y'])
  
          .withAudioBitrate('192k')
  
          .withAudioCodec('libvorbis')
  
          .toFormat('webm')

  The video get's streamed properly to the client but the duration isn't passed on. So the video has a duration of 'infinite'.

  So I tried to encode with H264. Which also works (I see the duration being set in the client) but no picture sadly.

  For H264 I use :

     .addOptions(['-y','-vcodec libx264','-bf 8','-bt 240k','-preset fast','-strict -2','-b:v 320K','-bufsize 62000', '-maxrate 620k','-acodec aac','-ab 128k','-movflags +empty_moov'])
  
     .toFormat('mp4')

  I get this log :

  

  I hope someone can point me in the right direction. Thanks !

  The client just gives an undefined error.
  I hope someone can point me in the right direction.

  Thanks

• An Electron RTSP player : How to play the video stream ?

  3 octobre 2023, par Siavoshkc

  What seemed to be an easy job turned out otherwise. I wanted to write an Electron app to manage DVR streams as I wasn't satisfied with some apps I used. I choose Electron because I recently started JS and took the opportunity to practice it and also play a bit with Electron.

  


  After deciding about how to handle GUI using web components, it was time to see how to read RTSP streams. My initial approach was to use FFmpeg. But I didn't know how to do so in Nodejs or Electron so I started a research.

  


  Long story short I understood that if one wants to use a C/C++ library in JS the best practice is to create bindings using Node API (formerly NAPI) which will result in a FFmpeg native addon. Then I assumed there is already a decent such addon available as FFmpeg is the go-to for video stuff. But to my surprise this isn't the case. Although there are some packages which run ffmpeg executive binary the ones that provide the binding are rare and not recent (such as beamcoder).

  


  FFmpeg web assembly is another option which I may consider but seemed overkill as I am not opening the streams in pure browser.

  


  Another approach was to use chromium media abilities as it has FFmpeg bundled for some media functions but to my understanding it cannot open RTSP streams at least for now.

  


  Can you please add to my current understanding on the matter ?