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• lavu/riscv : AV_READ_TIME cycle counter

  12 septembre 2022, par Rémi Denis-Courmont

  lavu/riscv : AV_READ_TIME cycle counter
  This uses the architected RISC-V 64-bit cycle counter from the
  
  RISC-V unprivileged instruction set.
  In 64-bit and 128-bit, this is a straightforward CSR read.
  
  In 32-bit mode, the 64-bit value is exposed as two CSRs, which
  
  cannot be read atomically, so a loop is necessary to detect and fix up
  
  the race condition where the bottom half wraps exactly between the two
  
  reads.
  

  • [DH] libavutil/riscv/timer.h
  • [DH] libavutil/timer.h

• ffmpeg : move decoded frame counter from after post-processing to decode

  5 août 2022, par Jan Ekström

  ffmpeg : move decoded frame counter from after post-processing to decode
  This way we can call process_subtitles without causing the decoded
  
  frame counter to get bumped.
  Additionally, this now takes into mention all of the decoded
  
  subtitle frames without fix_sub_duration latency/buffering, or filtering
  
  out decoded reset/end subtitles without any rendered rectangles, which
  
  matches the original intent in 4754345027eb85cfa51aeb88beec68d7b036c11e
  
  .
  Signed-off-by : Jan Ekström <jan.ekstrom@24i.com>
  

  • [DH] fftools/ffmpeg.c

• FFmpeg FPS counter + resolution/bitrate box

  3 janvier 2024, par NoyaZ_

  I was trying to use drawtext FFmpeg filter to insert a frame counter at the bottom of my video by using this command :

  


  ffmpeg -i original.mp4 -vf "drawtext=fontfile=C\\:/Windows/fonts/consola.ttf: text='Frame\\: %{frame_num}': start_number=1: x=(w-tw)/2: y=h-(2\*lh): fontcolor=black: fontsize=50: box=1: boxcolor=white: boxborderw=5" -c:a copy output.mp4

  


  So far all works fine. I was wondering how could I insert a resolution/bitrate box at the top of the video as shown in the image below :

  


  

  


  Which parameters/metadata can come in hand ?