One/multiple pictures of ffmpeg to synthesize video

ffmpeg  synthesizes a picture into a video and sets the video duration

(1) execute the code,

Full code:

import subprocess
import os
 
# 把一张图片合成视频，设置视频时长
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:

Combining ffmpeg and opencv to synthesize video from multiple pictures

Note: It is necessary to pay attention to the selection of parameters and image size

img_root: is the path where the jpg image is stored

out_root: is the save path of avi video

string = img_root + 'img' + str(im_name) + '.jpg': It is the storage path of the image. Here my pictures are under the images folder,

• fps: is the frame rate, which will directly cause the number of frames and duration of the video to be different
• parameter

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

(2) execute the code,

My full 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")  #支持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()
# 将输出的视频变为mp4格式或者压缩
dir = out_root.strip(".avi")
command = "ffmpeg -i %s.avi %s.mp4" % (dir, dir)
call(command.split())

(3) During the execution process, we can see that a total of 3 pictures have been processed.

Wait for the code to run to completion,

(4) Execution result: two video files will be generated, avi video file and mp4 video file,

One of the original  ffmpeg/multiple pictures to synthesize video

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