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@HaydenFaulkner
Last active August 16, 2019 13:20
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Function for taking a directory of images and turning it into a video
import cv2
import glob
import os
from tqdm import tqdm
def frames_to_video(frames_dir, video_path, fps=30):
"""
Generates a .mp4 video from a directory of frames
:param frames_dir: the directory containing the frames, note that this and any subdirs be looked through recursively
:param video_path: path to save the video
:param fps: the frames per second to make the output video
:return: the output video path, or None if error
"""
frames_dir = os.path.normpath(frames_dir) # make the paths OS (Windows) compatible
video_path = os.path.normpath(video_path) # make the paths OS (Windows) compatible
# add the .mp4 extension if it isn't already there
if video_path[-4:] != ".mp4":
video_path += ".mp4"
# get the frame file paths
for ext in [".jpg", ".png", ".jpeg", ".JPG", ".PNG", ".JPEG"]:
files = glob.glob(frames_dir + "/**/*" + ext, recursive=True)
if len(files) > 0:
break
# couldn't find any images
if not len(files) > 0:
print("Couldn't find any files in {}".format(frames_dir))
return None
# get first file to check frame size
image = cv2.imread(files[0])
height, width, _ = image.shape # need to get the shape of the frames
# sort the files alphabetically assuming this will do them in the correct order
files.sort()
# create the videowriter - will create an .mp4
video = cv2.VideoWriter(video_path, cv2.VideoWriter_fourcc('m', 'p', '4', 'v'), fps, (width, height))
# load and write the frames to the video
for filename in tqdm(files, desc="Generating Video {}".format(video_path)):
image = cv2.imread(filename) # load the frame
video.write(image) # write the frame to the video
video.release() # release the video
return video_path
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