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• Output a video to a file

  3 novembre 2011, par EagleEye

  I am working on a very CPU intensive legacy application on windows which captures video frames from camera and displays it on the screen. Now I need to add a feature to it to save this video feed to an output file. And I have a raw image data as an input. I need to make this process as efficient as possible so that it doesn't affect the performance of my application.

  So what are the best available API's in C++ that I can use to create an output video file. And moreover what should be the most efficient encoding format that I must use so that I get the maximum throughput. Also I may have to use some compression techniques. So what should be the best approach.

  Moreover can I use GPU acceleration for this process and how ?

  Uptil now I have encountered following tools that I may use :

  1. OpenCV
  2. Microsoft Media Foundation LIbrary or DirectShow
  3. ffmpeg

• Anomalie #3588 (Nouveau) : log remplis par @apc_delete_file()

  10 novembre 2015, par nico d

  Hello,

  sur un site au traffic assez important, je viens de voir que j’ai un error.log qui se remplit extrêmement vite de warnings :

  [apc-warning] Could not stat file /var/www/..., unable to delete from cache. in /var/www/touleco3/ecrire/inc/flock.php on line 329.

  A tel point que je suis obligé de commenter ligne 329 @apc_delete_file()

  https://core.spip.net/projects/spip/repository/entry/branches/spip-3.0/ecrire/inc/flock.php#L329

  J’ai découvert ça récemment par hasard, le site était en 3.0.20, je viens de mettre à jour en 3.0.21, toujours pareil.

  Il y a une rotation des logs sur le serveur (rotation sur une semaine avec 52 archives), et visiblement error.log grossit énormément à partir de la semaine du 5 au 12 juillet, soit juste après une mise à jour en 3.0.20

• reverse Video : Moviepy Error, by using time.mirror

  22 août 2023, par stelidakis

  im desperately trying to reverse a movie with moviepy by using .time_mirror.

  


  from moviepy.editor import *
import moviepy.video.fx.all as vfx
# Load the video
video = VideoFileClip("/videos/uncut/videogames/other/001.mp4")


popreversed_video = video.fx(vfx.time_mirror)

# Save the reversed video
reversed_video.write_videofile("videos/cut/videogames/other/001_rev.mp4")

print("done")


  


  but im always getting this error :

  


  MoviePy error: failed to read the first frame of video file /videos/uncut/videogames/other/001.mp4. That might mean that the file is corrupted. That may also mean that you are using a deprecated version of FFMPEG. On Ubuntu/Debian for instance the version in the repos is deprecated. Please update to a recent version from the website.&#xA;  File "/Shorts Project/codefiles/video_play_and_rewinde_test_001.py", line 11, in <module>&#xA;    popreversed_video = video.fx(vfx.time_mirror)&#xA;OSError: MoviePy error: failed to read the first frame of video file /videos/uncut/videogames/other/001.mp4. That might mean that the file is corrupted. That may also mean that you are using a deprecated version of FFMPEG. On Ubuntu/Debian for instance the version in the repos is deprecated. Please update to a recent version from the website.&#xA;</module>

  


  the funny thing is, moviepy is installed, uninstalled, reinstalled and updated.
further, ffmpeg is installed, uninstalled, reinstalled, updated.

  


  but stimm its not working.

  


  Please help

  


  Thank you

  


  

  • pip install moviepy

  


  • pip uninstall moviepy

  


  • pip install ffmpeg

  


  • pip install ffmpeg-python

  


  • brew install ffmpeg

  


  • pip uninstall ffmpeg

  


  • pip install —upgrade moviepy

  


  


  probably not in this order, but everything is on the currently newest version.
Operator : MacOs