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• ffmpeg unrecognized file type

  1er février 2019, par user892134

  I’m using Mac OS and ffmpeg. I’m attempting to convert mp3 to mp4 with image background and overlay audio visualization.
  The below works when converting mp3 to mp4 with image :

  $mp3 = "/Users/vanessa/Downloads/test/Marco.mp3";
  
      $image = "/Users/vanessa/Downloads/test/maxresdefault.jpg";
  
      $video = "/Users/vanessa/Downloads/test/videos/test2.mp4";
  
  
  
    exec("/usr/local/Cellar/ffmpeg/4.1_3/bin/ffmpeg -loop 1 -i $image -i $mp3 -c:v libx264 -c:a aac -strict experimental -b:a 192k -shortest $video 2>&1",$output); 

  I can successfully play test2.mp4. When i attempt to do add an overlay of audio visualization. I can see in get info how it looks in the preview section but when i click on the file it says : File open error:Unrecognized file type

  exec("/usr/local/Cellar/ffmpeg/4.1_3/bin/ffmpeg -y -i $mp3 -loop 1 -i $image -filter_complex '[0:a]showwaves=s=1280x175:colors=White:mode=line,format=yuv420p[v];[1:v][v]overlay=0:200[outv]' -map '[outv]' -pix_fmt yuv420p -map 0:a -c:v libx264 -c:a copy -shortest $video 2>&1",$output); 

  Where did i go wrong ? The player i’m using is Quicktime.

• Questions Tags Users How do I use ffmpeg to record a video clip with 20 seconds before and 20 seconds after motion happened ?

  18 avril 2020, par user2661357

  I am using an IP camera with rtsp stream to do motion detection. When a motion happens, I want to use ffmpeg to record a video clip with 20 seconds before and 20 seconds after motion happened. Please show me how I should do that use ffmpeg. Thanks.

  


• How to extract Geolocation metadata from an Apple Live Photo ?

  18 mars 2020, par P'P'

  I’m trying to organize my photo collection and convert .mov files to .jpeg files while retaining all of the meta data that has been stored. I’m running into a problem with Apple’s "Live Photos" though...

  I recently downloaded all of the photos from my iCloud account and found that many have been stored as .mov files as "Live Photos". As I only want to include photos in this collection, I’d like to convert all of these .mov files to .jpg files.

  So... I’m trying to use python and shell commands to do this. Here’s an extract of my code :

  # Convert the .mov file into a series of jpegs using ffmpeg
  
  os.system(f'ffmpeg -i {movie} -r {numFrames} -map_metadata 0 -movflags use_metadata_tags {imageRoot}_%0004d.jpg')
  
  
  
  # ... some code to find the best slice of the movie to keep as an image ...
  
  
  
  # Add any meta tags that may have been missed
  
  os.system(f'exiftool -tagsFromFile {movie} {image}"

  Unfortunately, the Geolocation metadata isn’t being copied from the .mov file to the .jpg files. exiftool movie.mov doesn’t list any GPS or Geolocation tags either, but I know that this data is included somewhere within the file as Apple is able to map the location that the 2 second video was taken. Any thoughts as to how I can extract this meta data from Apple’s Live Photo .mov clips ?

  Thanks in advance.

  PP