Ffmpeg one / more pictures synthetic video

Catalog

ffmpeg Synthesize a picture into a video , And set the video duration

ffmpeg And opencv Combined Multi picture composite video

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ffmpeg Synthesize a picture into a video , And set the video duration

（1） Execute code ,

Complete code ：

import subprocess
import os

#  Synthesize a picture into a video , Set the video duration 
cmdLine = "ffmpeg -r 25 -loop 1 -i images/img1.png -pix_fmt yuv420p -vcodec libx264 -b:v 600k -r:v 25 -preset medium -crf 30 -s 720x576 -vframes 250 -r 25 -t 10 a.mp4"
subprocess.call(cmdLine, shell=True)

（2） Running results ：

ffmpeg And opencv Combined Multi picture composite video

Be careful ： Attention should be paid to the selection of parameters and image size

• img_root： yes jpg The way to store the pictures

• out_root： yes avi The path to save the video

• string = img_root + 'img' + str(im_name) + '.jpg'： Is the storage path of the picture . My picture here is in images Under the folder ,

   

• fps： Is the frame rate , It will directly cause the frame number and duration of the video to be different

• Parameters

（1） You can modify some variables and parameters in the code according to your own needs ,

（2） Execute code ,

My complete code ：

import cv2
from cv2 import VideoWriter, VideoWriter_fourcc, imread, resize
import os
from subprocess import call


img_root = 'images/'
out_root = 'pig.avi'

fps = 1
fourcc = VideoWriter_fourcc(*"MJPG")  # Support jpg
videoWriter = cv2.VideoWriter(out_root, fourcc, fps, (640, 480))
im_names = os.listdir(img_root)
print(len(im_names))
for im_name in range(1, 4):
    string = img_root + 'img' + str(im_name) + '.jpg'
    print(string)
    frame = cv2.imread(string)
    frame = cv2.resize(frame, (640, 480))
    videoWriter.write(frame)

videoWriter.release()
#  Change the output video into mp4 Format or compress 
dir = out_root.strip(".avi")
command = "ffmpeg -i %s.avi %s.mp4" % (dir, dir)
call(command.split())

（3） In the process of execution , We can see that a total of 3 A picture ,

  Wait for the code to run ,

（4） Execution results ： Two video files will be generated ,avi Video files and mp4 Video file ,