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Haven't tried yet, but am wondering what is the best mechanism for doing less work for a given video to speed up?

Can we just skip N frames in the range here?

I'm aiming to find the places of the algorithm that takes the longest time and try to minimize it,
Can a possible way to do so will be to consider a video as a collection of 1 frame for every 1 sec and then doing the same pipeline?

How long it takes to get 5-10 frames from a 1,5,10,15,20,25,30 min videos? with how many cores?

Thanks

Memory not getting cleared and python crashing when running script on >30 videos

I tried to use this module to detect keyframes, it's returning me an empty list? can you tell me what is the possible reason for that?

I have found new erro. I use
imgs = vd.extract_video_keyframes(no_of_frames = no_of_frames_to_return, file_path= video_file_path)
to extract keyframe frome my video.

Is it possible to compute timestamp for extracted frames as frame metadata?

I use the basic extract_video_keyframes function in Colab. Sometimes it works but most of the time it takes a pretty long time to extract keyframes. I only want to extract the single one frame from a 15s video. Has anybody also face this problem? Or is there anything wrong with my environment settting?

when i use kanta to process my video , it send this erro.could you tell me how to solve it?

Hello, the link mentioned in the readme - https://keplervaani.com/katna/tutorials.html is unavailable. Can something be done to get it up and running? Thanks!

ValueError Traceback (most recent call last)
in ()
4
5 #instantiate the video class
----> 6 vd = Video()
7
8 #number of key-frame images to be extracted

2 frames
/usr/lib/python3.6/multiprocessing/pool.py in init(self, processes, initializer, initargs, maxtasksperchild, context)
165 processes = os.cpu_count() or 1
166 if processes < 1:
--> 167 raise ValueError("Number of processes must be at least 1")
168
169 if initializer is not None and not callable(initializer):

ValueError: Number of processes must be at least 1

1. Why do I have to set no_of_frames?
2. What is the maximum value of no_of_frames?
3. Can the algorithm automatically find out images that are different from other frames as keyframes without setting no_of_frames?
4. If I set no_of_frames to a very large number, does it mean that every frame will be extracted?
   Thank you for your reply!

Can you please help me for sorting the extracted images from video. The extracted Images are not in sequence as per video playback.

after i extract the key frames ,can i locating which frame positon of the result?
thks

as the doc has say, video must create in main.
i have a project, which need to use video extract function, but there are other processes.
how can i pass video object to other processes since it's contain pool.
thanks for answering.

when I call the extract_video_keyframes method
No matter what The parameter 'no_of_frames' set to,
only 4 frames of images will be returned

this is my code

from Katna.video import Video
from Katna.writer import KeyFrameDiskWriter

vd = Video()

diskwriter = KeyFrameDiskWriter(location="selectedframes")

video_file_path = 'D:/video/color.avi'
no_of_frames_to_returned = 40

frame = vd.extract_video_keyframes(
     no_of_frames=no_of_frames_to_returned, file_path=video_file_path,
     writer=diskwriter
)

my video have 171 frames and no_of_frames is equal to 40, but only return four frames.

please help me ,please

it seems the "key frames extraction methods" works well, is there any referring papers I can get more detail info from?

I extracted images from video.
It looks like image sequence is wrong.
How do I fix it?

Using the example "crop all images in a single directory", if I use:

# crop dimensions
crop_width = 512
crop_height = 512

Then I'll also get images that are 460x460, as well as 512x512. Is there a way to force the specified dimensions only?

The specified method isn't working.

We Call the extract_video_keyframes method to extract the keyframes of the following video , but the following problem occurs:

i want to know how i can extract the corinates of the smart cropped image in respect to the original image like
crop{
x:
y:
weigth:
height:}

Hello,
it would be have AUR package so user will be able to install katna throw package manager.

Hi, thanks for the wonderful tool!
I wonder where I can make some modifications to let the output key frames named by their exact frame id in the original video frame sequence ;D

The sorting of the output key frame images is random, not the order of video frames. It is highly recommended that the name of the output image is the frame ID.

is it can be trained in my dataset?

While calling the function "get_key_frames_from_video (path_to_video, no_of_frames)" in a for loop, RAM usage goes on increasing.
For just 10 small videos ( < 1min ) in loop, RAM usage went beyond 6GB

Hi, congratulations o your work! :-)
So, I'm trying to use katna on a windows 10 machine with 16gb ram, python 3.8 and katna 0.9.0.
I am testing using a 2,6gb video and my memory keeps reaching 100% and the script eventually crashes. I also tried setting the Katna.config.FrameExtractor.max_frames_in_chunk from 2500 to 100 and Katna.Video.n_processes to 1, but still got the same problem. Any idea of how to solve this?

This is a snippet of the code I'm running:

if __name__ == "__main__":

  # initialize video module
  vd = Video()
  print('vd.n_processes:')
  print(vd.n_processes)

  # number of images to be returned
  no_of_frames_to_returned = 12
  diskwriter = KeyFrameDiskWriter(location=out_path)

  # extract keyframes and process data with diskwriter
  vd.extract_video_keyframes(
       no_of_frames=no_of_frames_to_returned, file_path=video_file_path,
       writer=diskwriter
  )```

pip3 install katana

installs a different package from pypi.

Can this be excluded form the documentation and readthedocs pages please?
Or Can we create a new pypi target for the project?