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• ffmpeg pipe blocks while capturing

  26 juin 2013, par Marco Vasapollo

  I have this code :

  public InputStream getInputStream() throws Exception {
  
      try {
  
          process = Runtime.getRuntime().exec("ffmpeg -f dshow -i video=\"" + query + "\":audio=\"" + microPhoneName + "\" -r 25 -vcodec mpeg4 -acodec mp3 -f avi -");
  
          } 
  
          catch (Exception e) {
  
          }
  
      return process.getInputStream();
  
  }

  When i use the inputStream.read(b) command, it works only for a little bit of times (180 to 400 times, depending from formats and codecs I use) then the inputStream lock on read and the application doesn't go anymore.

  What's the problem ? Memory saturation (ffmpeg process memory is at least 14mb) ?
  Is there a way to unlock this situation (clean memory, use a file as a bridge to prevent locks) ?

  Of course I need a little bit of "realtime", and not "post-process".
  I'm not constrained to use ffmpeg, I can change it if necessary.

• How do I record a Selenium Grid Session (Via VNC, Remote Frame Buffer - RFB) to an H264 encoded MP4 [closed]

  25 février, par Frobbit

  When my integration tests fail, I want to be able to watch the video of the test running. I test a full stack app with docker-compose and I use the single container Selenium-grid. If I save every Secenerio to a file, I can quickly review a failed test.

  


  I'm trying to record a Selenium Grid session and save it as an MP4 file using GStreamer and VNC. I need a solution that captures the VNC session running in the Selenium Grid container and writes the output to an H264 encoded mp4 file.

  


  Here's the context :

  


  I'm using Selenium Grid with a VNC server running in the container.
I can access the VNC session using the se:vncLocalAddress capability.

  


  I would like a tool that can record the VNC remote framebuffer (RFB) output.

  


  Can someone provide a reliable way to record a Selenium Grid session to an MP4 file using a tool like GStreamer or ffmpeg ?

  


• How do I convert a 3D SBS dual-fisheye image to 3D SBS dual-equirectangular with only open-source tools ? [closed]

  21 octobre 2024, par Ethan T

  Canon has released a new 3D VR lens for their RF mount and I recently rented it to see what it's like to work with. Unfortunately, they charge a subscription fee for their conversion software, which I've also found to be inconveniently limited in real-world use cases. Thus I'm interested in an open-source approach to converting the video captured by this lens using something like ffmpeg.

  


  The video is dual-fisheye and the Canon tool produces dual-equirectangular side-by-side video. I would like to perform this same conversion in ffmpeg or a similarly-powerful open-source tool.

  


  Related questions exist but aren't quite correct. Most dual-fisheye input seems to be used to create 360-degree 2D video, not 3D SBS.