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• How save an audio buffer with Fluent FFmpeg

  17 juin 2016, par Luke

  I have a Buffer object that contains audio data and I’m wondering if I can save this Buffer through Fluent FFmpeg without writing it to a file temporary first.

  I came across this other question : fluent-ffmpeg module : "end" event does not fire

  Which seems to do what I need but with video, however, this technique doesn’t seem to work for me. I get the following error :

  ffmpeg write error 'Input stream error: not implemented'

  How can I pipe a Buffer directly to Fluent FFmpeg without writing it to a temporary file first ?

• What are the steps required to create a non-NPAPI video decoder plugin - VLC Alternative ?

  26 novembre 2013, par ElHaix

  Google's Say Goodbye to Our Old Friend NPAPI blog post indicates that NPAPI plugin support will cease by the end of 2014 (in favor of PPAPI).

  We have considered the option of using the ffmpeg libraries to create our own video plugin to simply decode RTSP encoded H.264 video streams on the client - important because we need as near real-time video display (avoiding transcoding latency). Using the ffmpeg libraries, there is still a 3-5 second delay in decoding the stream, not as fast as running MPlayer with the -benchmark option.

  In trying Google's PNaCl recommendation, we just got the LOADING status and the following error :

  NativeClient : NaCl module load failed : PnaclCoordinator : Compile
  process could not be created : ServiceRuntime : failed to start

  Are there any other alternatives or suggestions ?

• FFMPEG JNI wrapper causes Android app exit

  5 décembre 2013, par user3043703

  I'm writing a JNI wrapper to use FFMPEG as a library in my Android project. I'm mainly using as references the halfninja project (and some forks) and this useful guide. I'm making a lot of personalizations but I got a working version with some additional codecs, the only problem is that, after FFMPEG ends, it causes my application to quit with no errors and I'd like to avoid this (for example to invoke FFMPEG again). Looking at the halfninja wrapper, the line of code exit(ret) ; from the cmdutils.c file is commented in the function void exit_program(int ret) but if I do the same with the latest (2.1.1) version of FFMPEG it causes me a signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 6f632494 error. My code looks like this :

  void exit_program(int ret)
  
  {
  
     if (program_exit)
  
        program_exit(ret);
  
  
  
     //exit(ret);
  
    //if I uncomment this the app automatically exits without errors
  
  }

  I see that both my references are a little old, also refering to a very old release of FFMPEG and it seems that meanwhile the source code changed a lot. I invoke FFMPEG through the JNI wrapper inserted in a new thread in the application code.

  All I'd like to know is : there's a way to avoid the automatic exit of my application after the end of FFMPEG thread ?