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• Combining zoompan slideshow with watermark overlay in FFMPEG

  2 avril 2020, par ricky_bobby43

  I've created a slideshow from a series of images with this

  



  ffmpeg -i img%d.jpg -vf zoompan=d=(7+1)/1:s=6144x3072:fps=1,framerate=25:interp_start=0:interp_end=255:scene=100 -c:v mpeg4 -q:v 2 out.mp4


  



  I have a semi-transparent watermark (inx.png) that I am applying for the first 3 seconds, but currenly using a separate command in FFMPEG :

  



  ffmpeg -i 6144out.mp4 -loop 1 -i inx.png -filter_complex "[1:v]format=argb,geq=r='r(X,Y)':a='0.5*alpha(X,Y)'[foo]; [foo]fade=out:st=3:d=1:alpha=1[bar], [0:v][bar]overlay" -vcodec libx264 output2.mp4


  



  Is there a way to combine the two ?

  


• ffmpeg Decoding Progress during Frame Extarction

  4 avril 2013, par Isantipov

  I scan input video to extract certain frames using ffmpeg's select filter. The selection is based on a complex creteria and the number of extracted frames can't be predicted (I'm doing scene detection, but this can be something different - e.g. selecting all the I frames, etc).

  What I need is to display the percentage of scanned (decoded) video (e.g. 10% or 90%).

  ---

  I tried several ways to do this parsing console output as people usually do when dealing with encoding, but it doesn't help with the progress of scanning (e.g. Can ffmpeg show a progress bar ? or ffmpeg Progress Bar - Encoding Percentage in PHP)

  ffmpeg -progress sceneProgr.txt -i input.wmv -vsync passthrough -an -vf select='gt(scene\,0.2)',showinfo scene%%05d.png

  The output this produces is as follows :

  <..>    
  
  frame=    0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A    
  
  n:0 pts:16550 pts_time:16.55 pos:4205325 fmt:rgb24 sar:0/1 s:640x480 i:P iskey:1 type:I checksum:95895BC9 plane_checksum:[95895BC9]
  
  frame=    1 fps=0.7 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A    
  
  n:1 pts:24591 pts_time:24.591 pos:6685325 fmt:rgb24 sar:0/1 s:640x480 i:P iskey:0 type:P checksum:FF4CC015 plane_checksum:[FF4CC015]
  
  'frame=...' and 'n:...' lines are repeated for each of the extracted frames.

  Both frame=... and n:... lines refer to the numbers in the output and therefore can't be used to calculate progress the way people usually do this (as I can't predict how many frames will be found beforehead and besides, they are not uniformly spread across the input video).

  ---

  If I specify -progress progress.txt parameter, the progress.txt file is as follows :

  frame=5
  
  fps=1.2
  
  stream_0_0_q=0.0
  
  total_size=N/A
  
  out_time_ms=43209833
  
  out_time=00:00:43.209833
  
  dup_frames=0
  
  drop_frames=0
  
  progress=continue
  
  
  
  
  
  frame=6
  
  fps=1.3
  
  stream_0_0_q=0.0
  
  total_size=N/A
  
  out_time_ms=52252200
  
  out_time=00:00:52.252200
  
  dup_frames=0
  
  drop_frames=0
  
  progress=continue
  
  
  
  frame=6
  
  fps=1.2
  
  stream_0_0_q=0.0
  
  total_size=N/A
  
  out_time_ms=52252200
  
  out_time=00:00:52.252200
  
  dup_frames=0
  
  drop_frames=0
  
  progress=continue

  New portion is written approximately every second and refers to the last extracted frame.
  Which is somewhat helpful as out_time refers to the last extracted frames' position in the input video, so I can calculate the progress of the scan from it as

  progress = out_time_ms/total_input_time 

  But this is not ideal as it will be updated only when the new frame which matches the select criteria is extracted. So, If I have a large portion of video with no matching frames, the progress won't change for a lot of time.

  ---

  Wrapping-up :

  I am looking for a way to calculate the progress of video scanning when using select filter.

  Any ideas are strongly appreciated.

• ffmpeg Video Scan Progress during Frame Extarction

  5 avril 2013, par Isantipov

  I scan input video to extract certain frames using ffmpeg's select filter. The selection is based on a complex creteria and the number of extracted frames can't be predicted (I'm doing scene detection, but this can be something different - e.g. selecting all the I frames, etc).

  What I need is to display the percentage of scanned (decoded) video (e.g. 10% or 90%).

  ---

  I tried several ways to do this parsing console output as people usually do when dealing with encoding, but it doesn't help with the progress of scanning (e.g. Can ffmpeg show a progress bar ? or ffmpeg Progress Bar - Encoding Percentage in PHP)

  ffmpeg -progress sceneProgr.txt -i input.wmv -vsync passthrough -an -vf select='gt(scene\,0.2)',showinfo scene%%05d.png

  The output this produces is as follows :

  <..>    
  
  frame=    0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A    
  
  n:0 pts:16550 pts_time:16.55 pos:4205325 fmt:rgb24 sar:0/1 s:640x480 i:P iskey:1 type:I checksum:95895BC9 plane_checksum:[95895BC9]
  
  frame=    1 fps=0.7 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A    
  
  n:1 pts:24591 pts_time:24.591 pos:6685325 fmt:rgb24 sar:0/1 s:640x480 i:P iskey:0 type:P checksum:FF4CC015 plane_checksum:[FF4CC015]
  
  'frame=...' and 'n:...' lines are repeated for each of the extracted frames.

  Both frame=... and n:... lines refer to the numbers in the output and therefore can't be used to calculate progress the way people usually do this (as I can't predict how many frames will be found beforehead and besides, they are not uniformly spread across the input video).

  ---

  If I specify -progress progress.txt parameter, the progress.txt file is as follows :

  frame=5
  
  fps=1.2
  
  stream_0_0_q=0.0
  
  total_size=N/A
  
  out_time_ms=43209833
  
  out_time=00:00:43.209833
  
  dup_frames=0
  
  drop_frames=0
  
  progress=continue
  
  
  
  
  
  frame=6
  
  fps=1.3
  
  stream_0_0_q=0.0
  
  total_size=N/A
  
  out_time_ms=52252200
  
  out_time=00:00:52.252200
  
  dup_frames=0
  
  drop_frames=0
  
  progress=continue
  
  
  
  frame=6
  
  fps=1.2
  
  stream_0_0_q=0.0
  
  total_size=N/A
  
  out_time_ms=52252200
  
  out_time=00:00:52.252200
  
  dup_frames=0
  
  drop_frames=0
  
  progress=continue

  New portion is written approximately every second and refers to the last extracted frame.
  Which is somewhat helpful as out_time refers to the last extracted frames' position in the input video, so I can calculate the progress of the scan from it as

  progress = out_time_ms/total_input_time 

  But this is not ideal as it will be updated only when the new frame which matches the select criteria is extracted. So, If I have a large portion of video with no matching frames, the progress won't change for a lot of time.

  ---

  Wrapping-up :

  I am looking for a way to calculate the progress of video scanning when using select filter.

  Any ideas are strongly appreciated.