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• vaapi_encode_h265 : Ensure that ref pics are always in the RPS

  25 janvier 2019, par Mark Thompson

  vaapi_encode_h265 : Ensure that ref pics are always in the RPS
  When making a new P-frame when B-frames are present the previous P-frame
  
  is normally in the DPB because it will be referred to by subsequent
  
  B-frames.  However, this is not true if there are no B-frames, or in edge
  
  cases where a GOP ends with two P-frames.  Fix this by adding the direct
  
  ref pics to the RPS explicitly.
  Fixes #7699.
  Tested-by : Ullysses A Eoff <ullysses.a.eoff@intel.com>
  

  • [DH] libavcodec/vaapi_encode_h265.c

• How to draw - dynamic - "safe areas" in ffplay

  16 juin 2023, par F.O.R.A.R.T.

  we need to preview videos with overlayed so-called "safe areas" according to this EBU document : SAFE AREAS FOR 16:9 TELEVISION PRODUCTION.

  


  Here's the scheme for 1080p resolution :
1080p Safe Areas

  


  Those consist of three different "zones", each with the same percentage size-to-the-edge of the video frame for any resolution :

  


  

  • Action Safe Area (GREEN box) : 3.5%

  


  • Graphics Safe Area (RED box) : 5%

  


  • 4:3 Safe Area (GREY box) : 16.25%

  


  


  It should be easily achieveable using the drawbox command, but how can be dynamically adapted to any video resolution ?

  


• Converted video is not played in Firefox

  20 juillet 2023, par Kiten

  I have a code that accepts the video file from the client converts it and saves it on the server with .mp4 extension. Video processing is made using fluent-ffmpeg. Here is the code :

  


  ffmpeg()
  .size('360x?')
  .videoCodec('libx264')
  .output()
  .on("end", () => {
    console.log(`Video saved with resolution 360`);
    res.json('Uploaded')
  })
  .on("error", (error) => {
    console.error(
      `Error saving video with resolution 360:`,
      error
    );
    res.status(500).json({ message: "Conversion error" });
  })
  .run();


  


  The problem is that the resulting files are not played in the Firefox browser (but work in Microsoft Edge and Google Chrome).
Is it possible to change the parameters so that the resulting files are compatible with Firefox browser ?