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• ffmpeg - convert movie AND show original input (as resized picture-in-picture, top-left corner) in the final output file

  2 octobre 2019, par raven

  this is my first post on this forum, so please be gentle in case I accidentally do trip over any forum rules that I would not know of yet :).

  I would like to apply some color-grading to underwater GoPro footage. To quicker gauge the effect of my color settings (trial-and-error, as of yet), would like to see the original input video stream as a PIP (e.g., scaled down 50%), in the top-left corner of the converted output movie.

  I have one input movie that is going to be color graded. The PIP should use the original as an input, just a scaled-down version of it.

  I would like to use ffmpeg’s -filter_complex option to do the PIP, but all examples I can find on "-filter_complex" would use two already existing movies. Instead, I would like to make the color-corrected stream an on-the-fly input to "-filter_complex", which then renders the PIP.

  Is that doable, all in one go ?

  Both the individual snippets below work fine, I now would like to combine these and skip the creation of an intermediate color-graded video. Your help combining these two steps into one single process is greatly appreciated !

  Thanks in advance,
  raven.

  [existing code snippets (M$ batch files)]
  
  
  
  ::declarations/defines::
  
  set "INPUT="
  
  set "TMP="
  
  set "OUTPUT="
  
  set "FFMPG="
  
  set "QU=9" :: quality settings
  
  
  
  set "CONV='"0 -1 0 -1 5 -1 0 -1 0:0 -1 0 -1 5 -1 0 -1 0:0 -1 0 -1 5 -1 
  
  0 -1 0:0 -1 0 -1 5 -1 0 -1 0'"" :: sharpening convolution filter
  
  
  
  ::color-grading part::
  
  %FFMPG% -i %INPUT% -vf convolution=%CONV%,colorbalance=rs=%rs%:gs=%gs%:bs=%bs%:rm=%rm%:gm=%gm%:bm=%bm%:rh=%rh%:gh=%gh%:bh=%bh% -q:v %QU% -codec:v mpeg4 %TMP%
  
  
  
  ::PIP part::
  
  %FFMPG% -i %INPUT% -i %TMP% -filter_complex "[1]scale=iw/3:ih/3 
  
  [pip]; [0][pip] overlay=main_w-overlay_w-10:main_h-overlay_h-10" -q:v 
  
  %QU% -codec:v mpeg4 %OUTPUT%
  
  
  
  [/existing code]

• Fluent-ffmpeg : Adding gif animation as overlay between x time to y time

  2 octobre 2020, par Akhil P M

  Im a beginner to ffmpeg. I want to set a gif animation as an overlay of input video from a x seconds to y second . I tried the following codes

  



  var wmimage= 'public/source/watermark_file.gif';

ffmpeg('public/source/small.mp4')
.addOption(['-ignore_loop 0', '-i '+wmimage+ '','-filter_complex [0:v][1:v]overlay=10:10:shortest=1:'])
.save('public/video/output-video2.mp4');


  



  This gives me gif animation overlay from start to end of the input video length. but i need to show the gif for a duration (eg : from :2second to : 5second). So i tried to adding

  



  enable="between(t,2,5)" 
at

  



  .addOption(['-ignore_loop 0', '-i '+wmimage+ '','-filter_complex [0:v][1:v]overlay=10:10:shortest=1:enable="between(t,2,5)"'])


  



  But it throws

  



  Error: ffmpeg exited with code 1: Error initializing complex filters.
Invalid argument


  



  I tried the enable option before overlay and shortest. but gives the same error.

  



  Any help will appreciated.

  


• Time stamped video to time stamped images

  16 mai 2015, par Andrew

  I have a time stamped AVI video file.

  I want to create images from the frames of the video but I need them to also have a time associated with them as well.

  I can create images from the video through FFmpeg using :

  ffmpeg -i video.avi -r 0.1 image_%05.jpeg

  However this images do not have a time embedded. Is it possible to also take the time associated with each frame in the video ?

  My end goal is to sync the time stamp with a GPS track to geotag the images (from the video frames.)