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• how can I get the compression progress percentange using arthenica.ffmpegkit ?

  28 février 2023, par user44551

  I have an app in Kotlin to compress a video using arthenica.ffmpegkit. I searched in the documentation but it's not clear to me how to get the compression progress in percentage or even if it's possible.

  


• how to capture continuous Realtime progress stream of output (from ffmpeg)

  6 décembre 2022, par user206904

  I am having trouble showing the progress of ffmpeg through my script. I compile my script to exe with ps2exe and ffmpeg output on standard error instead of outputting on standard out
So I used to pipe 1 option

  


  my script.ps1 now is :

  


  # $nb_of_frames= #some_int
& $ffmpeg_path -progress pipe:1 -i input.mp4 -c:v libx264 -pix_fmt yuv420p -crf 25 -preset fast -an output.mp4


  


  then I compile it with ps2exe. (to reproduce you don't need the compile, just use the above command with pipe:1 directly in cmd or PowerShell you will get the same behavior)

  


  Normally with ffmpeg you get a progress reporting (that is interactive), one line containing the information and it keeps getting updated as 1 single line without spamming the console with 100s of lines, it looks like this.

  


  frame= 7468 fps=115 q=22.0 size=   40704kB time=00:05:10.91 bitrate=1072.5kbits/s speed= 4.8x


  


  But this does not appear in the compiled version of my script, so after digging I added -progress pipe:1 to get the progress to appear on std out

  


  Now I get a continuous output every second that looks like this :

  


  frame=778
fps=310.36
stream_0_0_q=16.0
bitrate= 855.4kbits/s
total_size=3407872
progress=continue
...
frame=1092
fps=311.04
stream_0_0_q=19.0
bitrate= 699.5kbits/s
total_size=3932160
progress=continue 


  


  I would like to print some sort of updatable percentage out of this, I can compute a percentage easily if I can capture that frame number, but in this case, I don't know how to capture a real-time output like this and how to make my progress reporting update 1 single line of percentage in real-time (or some progress bar via symbols) instead of spamming on many lines

  


  (or if there is a way to make the default progress of FFmpeg appear in the compiled version of my script that would work too)

  


  edit : a suggestion based on the below answer

  


  #use the following lines instead of write-progress if using with ps2exe
            #$a=($frame * 100 / $maxFrames)
            #$str = "#"*$a
            #$str2 = "-"*(100-$a)
            #Write-Host -NoNewLine "`r$a% complete | $str $str2|"



  


  Thanks

  


• pthread_frame : use better memory orders for frame progress

  9 décembre 2016, par Wan-Teh Chang

  pthread_frame : use better memory orders for frame progress
  This improves commit 59c70227405c214b29971e6272f3a3ff6fcce3d0.
  In ff_thread_report_progress(), the fast code path can load
  
  progress[field] with the relaxed memory order, and the slow code path
  
  can store progress[field] with the release memory order. These changes
  
  are mainly intended to avoid confusion when one inspects the source code.
  
  They are unlikely to have measurable performance improvement.
  ff_thread_report_progress() and ff_thread_await_progress() form a pair.
  
  ff_thread_await_progress() reads progress[field] with the acquire memory
  
  order (in the fast code path). Therefore, one expects to see
  
  ff_thread_report_progress() write progress[field] with the matching
  
  release memory order.
  In the fast code path in ff_thread_report_progress(), the atomic load of
  
  progress[field] doesn’t need the acquire memory order because the
  
  calling thread is trying to make the data it just decoded visible to the
  
  other threads, rather than trying to read the data decoded by other
  
  threads.
  In ff_thread_get_buffer(), initialize progress[0] and progress[1] using
  
  atomic_init().
  Signed-off-by : Wan-Teh Chang <wtc@google.com>
  
  Signed-off-by : Anton Khirnov <anton@khirnov.net>
  

  • [DBH] libavcodec/pthread_frame.c