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• Question with complex ffmpeg compositing, overlays, visualizations etc [closed]

  14 novembre 2023, par Michael Ciesielczyk

  I'm trying to make a video that will consist of an underlying video that will need to repeat until the end of the video. The video's length as well as to video elements will come from a wav audio file. There will also be one static image overlay and 3 to 5 more images that will be overlayed at set intervals.

  


  I was able to get a little ways with a few of the elements but when I have tried to put them all together in one go I can't figure it out. And I'm trying to get it in one got to get the best possible image quality I can so I don't end up re encoding the video multiple times. I'm also using this as a template for multiple videos so when I get it figured out I can just change the images to generate the new videos.

  


  so I have these elements :

  


  background video: bg.mp4
audio file: test.wav
static image: logo.png
rotating images: 1.png, 2.png, 3.png


  


  so I have :

  


  ffmpeg -i test.wav -filter_complex " 
[0:a]avectorscope=s=1320x1240:zoom=1.5,pad=3840:2160[vs]; 
[0:a]showwaves=s=1280x202:colors=White:mode=line[sw];[vs][sw]overlay=x=(main_w- 
overlay_w)/2:y=(main_h-400)[bg]" -map "[bg]" -map 0:a  -y -acodec aac video.mp4


  


  This gets me my 4k video file and my two visualizations and my audio in my video file placed about where I want them.

  


  I can get the rotating images to appear at the right times overlayed on the bg.mp4 file with this.

  


  ffmpeg -i bg.mp4 -i 1.png -i 2.png -i 3.png -filter_complex "[0] 
[1]overlay=x=0:y=0:enable='between(t,0,4)'[out];[out] 
[2]overlay=x=0:y=0:enable='between(t,4,8)'[out];[out] 
[3]overlay=x=0:y=0:enable='between(t,8,12)'[out]" -map "[out]" video.mp4


  


  But I can't figure out how to do it all together. I have ended up with bg.mp4 file playing inside the avectorscope visual. like the rest of that box was cropping it. And I know I can loop an overlay video with -stream_loop -1 and shortest=1 but I'm not sure what to do in order to have the bg video loop until the end of the audio.

  


  I think some of my trouble is I am terrible dyslexic and a missing comma or missing close quote and it's a no go.

  


  Anyone able to help me put this together ?

  


  Oh and one last thing. I'm also wanting to put some simple text overlayed. like with

  


  overlay=0:0,drawtext=fontfile=/usr/share/fonts/TTF/Vera.ttf:fontcolor=
white:x=200:y=200:text='"text'[out]"`


  


  thank you to anyone who can help me !

  


• Extract Creation date and time of multiple files at once [duplicate]

  28 juillet 2021, par sJoss

  $ ffprobe -v quiet -select_streams v:0 -show_entries stream_tags=creation_time -of default=noprint_wrappers=1:nokey=1 input.mp4

  


  This is good for one file at a time, can someone suggest while multiple files like 50 files at a time ? or how to run this in a loop ? When there are 50 files, it doesn't make sense to run this command 50 times inputting file name every single time. Thanks

  


• Core : errorList should contain only the errors that it should

  24 novembre 2015, par Arkni

  Core : errorList should contain only the errors that it should
  When using the `valid` method on a list of inputs and there is an ignored
  
  input in that list, the errorList is not cleared causing it to slowly
  
  growing larger and larger when calling `valid` several times.
  Fixes #1618