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• libavcodec/hcadec : fix header parsing after 'comp' section

  17 juin, par Pavel Roslyy

  libavcodec/hcadec : fix header parsing after 'comp' section
  Need to skip 2 more bytes because comp sections are 12 bytes long.
  
  Fixes decryption since ciph_type is now being set.
  Signed-off-by : Pavel Roslyy <roslypav@gmail.com>
  

  • [DH] libavcodec/hcadec.c

• Correct hindi text drawing when using ffmpeg

  28 février 2024, par OhhhThatVarun

  I have a ffmpeg script to add some Hindi text to the mp4 video file.

  


  The ffmpeg command looks like this

  


  ffmpeg -i template_video.mp4 -filter_complex "drawtext=text='नमस्कार जी मैं हूँ':fontfile=mukta.ttf:fontsize=40:box=1:boxcolor=black@0.5:boxborderw=5:x=530:y=530:enable='between(t,20,22)'[output]; [output] drawtext=text='आज हम स्कैन करेंगे':fontfile=mukta.ttf:fontsize=20:box=1:boxcolor=black@0.5:boxborderw=5:x=100:y=100:enable='between(t,15,20)'[outv]" -map "[outv]" -map 0:a? -c:a copy -pix_fmt yuv420p -s 1080x1920 output_video.mp4 -y


  


  Expected :

  


  

  


  Actual :

  


  

  


  

  


  As you can see the Hindi half letters are not getting rendered.

  


  I have gone through and tried these links :

  


  This question and This question

  


  I also tried this Github link

  


  Am I missing something to make it render properly ?

  


• Given 2 input videos of different lengths at 60 FPS with multiple common sections in between, what is the best way to sync them at the common section ?

  27 janvier 2024, par PirateApp

  
input vs output

  


  

  • In my actual case, there are 4 videos (basically gaming videos recorded from 4 different machines)

  


  • Each video may start or end at different duration (manually controlled by people starting and stopping recording and therefore their lengths vary slightly)

  


  • Each video has one or more common sections (basically a cutscene playing at the same time)

  


  • The distance between the common sections is the same in every video

  


  • How do I sync the videos at the common section ?

  


  • Basically I want to create a split screen video such that the common part plays at the same time on all the sub parts of the video

  


  • Keep in mind that the common sections wont be EXACTLY equal (because of graphics differences between machines but highly similar like dx9 vs dx11 or gamma)
What have I tried ?

  


  • Naive approach

  


  • Start video 1 at 0, start video 2 at 0.017, render the whole thing and check if it is in sync

  


  • Start video 1 at 0, start video 2 at 0.033, render the whole thing and check if it is in sync

  


  • Basically loop through the length of the video at each frame interval, render the full video and check if we get a synced version

  


  


  This sounds like a terrible idea honestly

  


    for (t1 in length of video a) {
    for (t2 in length of video b) {
       render a video with a and b starting at t1, t2 respectively
       increment t2 by 0.017 for b
    }
    increment t1 by 0.017 for a
  }


  


  Final output with 4 videos should look like this all synced at common sections


  


  Any better ideas ?