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• ModuleNotFoundError : No module named 'ffmpeg' on Spyder although ffmpeg is installed on Anaconda navigator

  1er septembre 2021, par alpha

  ffmpeg is installed on Anaconda Navigator (in base(root) environment), but when I run import ffmpeg, I got this error message :

  


  ModuleNotFoundError: No module named 'ffmpeg'


  


  Why is this module not found and how can I fix this ?

  


  

  


• How to detect a surge of activity in a video ?

  22 mars 2019, par Alain Collins

  I’d like to automatically detect a surge of activity in a video, e.g. basketball jump shot, hockey face-off, sprinters starting, etc., preferably using ffmpeg.

  In these instances, there’s some motion as the players assume their positions, followed by a pause as they wait for the ref to throw the ball or drop the puck, followed by a lot of motion as all players begin to react. It’s also typical that the camera will be still during this period and begin moving as the ball or puck changes position.

  I’ve tried using the ’select’ filter select='gt(scene,0.4)', but that seems to be more concerned with scene changes (i.e., more dramatic changes) even with low thresholds.

  I also tried exporting the scene information and examining it manually, but couldn’t find a clear pattern that correlated with motion in the video.

  UPDATE : I ran a mestimate on the video. Processing took a long time, but there was definitely a change in activity before and at point of interest. Is there a way to export this information to a file, or otherwise detect the amount of motion seen my mestimate ?

• How to create multi bit rate dash content using ffmpeg dash muxer

  26 août 2020, par andrii

  ffmpeg documentation says that we can use dash muxer to create dash segments and manifest file with just a single command, like :

  



  ffmpeg -re -i <input /> -map 0 -map 0 -c:a libfdk_aac -c:v libx264&#xA;-b:v:0 800k -b:v:1 300k -s:v:1 320x170 -profile:v:1 baseline&#xA;-profile:v:0 main -bf 1 -keyint_min 120 -g 120 -sc_threshold 0&#xA;-b_strategy 0 -ar:a:1 22050 -use_timeline 1 -use_template 1&#xA;-window_size 5 -adaptation_sets "id=0,streams=v id=1,streams=a"&#xA;-f dash /path/to/out.mpd&#xA;

  



  Saying I have some HD video file and I want this video to be available through DASH in different bit rates, so that clients can automatically select from the alternatives based on current network conditions. Can all these be done with a single ffmpeg command, like given above ?

  



  I know there is a solution with using ffmpeg + mp4box, but i'm interested if it could be done with ffmpeg only.