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• How does ffmpeg c/c++ concat mp4 files composed of unequal lengths of audio and video ?

  23 juin 2018, par fredirty2017
  • I am now write a program for capture microphone and desktop courses as mp4, where the microphone and screen image are captured independently, which means that it is possible that the microphone and screen are captured synchronously, and it is also possible that only the microphone are captured and screen are not capture, vice versa.
  • In addition, I will produce a piece of mp4 file according to the time, such as 10 minutes. Finally, once the entire lesson operation is completed, I will concat all the mp4 clip files into one big mp4 file.
  • I am not sure that mp4 has a way to set the last video frame or silent audio frame of the last clip file image for a period of time. Or do I have to fill these silent frames myself ?

• How we compressed videofile (all format) in android programmatically

  29 mars 2017, par prakash choudhary

  i am stuck with the funtionality for the compressed video before upload to the Amazon s3. i am looking functionality like the whatsup that compressed all the video of the gallery and camera after R&D i got FFmpeg library but that is increasing size of the app apk.Please there is any alternative t ? Any idea about this problem

• Can't write video using moviepy. output format error

  23 décembre 2022, par Ronnie Kisor

  I'm trying to concatenate videos in each folder so that I get one video in each folder instead of multiple short ones. This is an external USB drive if that matters.

  


  My code seems to iterate over the files as expected, but I keep getting this error after the audio is written, during the "writing video" action, I believe : b"[NULL @ 000002a8340ae640] Unable to find a suitable output format for 'D:\\taxes\\folder\\test'\r\nD:\\taxes\\folder\\test: Invalid argument\r\n"

  


  I haven't found a way to force an output format yet. Any thoughts ?

  


  import os
from moviepy.editor import *

startingDir = r'D:\taxes'

avoid = ['0incomplete', 'old', 'that', 'this']

for thing in os.listdir(startingDir):
    clips = []
    name = ''
    
    if thing in avoid:
        print('                              avoided {}'.format(thing))
        continue

    folder = os.path.join(startingDir, thing)

    if os.path.isdir(folder):
        for clip in os.listdir(folder):
            print (clip)
            clips.append(VideoFileClip(os.path.join(folder, clip)))
        print('\n')

        try:
            final = concatenate_videoclips(clips)
            final.write_videofile(os.path.join(folder, 'test'), audio=True, codec='libx264', threads=10)
            final.close() 
        except Exception as e:
            print (e)
            print('\n Continuing... \n\n')
            continue