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• Add custom metadata tag to video file without altering anything else

  9 juin 2020, par salgarji

  I'm modifying DASH-formatted segments, and my aim is to add extra information to the video segment using metadata tags.

  



  I'm using ffmpeg to record video from my webcam and store segments named like : init-video0-0.mp4 for the initial and video-0-0-N.mp4 for the following, where N is the segment number (beginning at N=1).

  



  For ffmpeg to 'understand' video files, they must have a playable video file format, for that purpose I concat initial segment with Nth segment :

  



  cat init-video-0-mp4 video0-0-N.mp4 > video0-0-N_mod.mp4


  



  Once I have a proper/correct file, I can use ffmpeg to add tags.
I've tried the following command :

  



  ffmpeg -y -i /path/to/file.mp4 -movflags use_metadata_tags -metadata customtag='whatEverYouWantToAdd' /path/to/new/file.mp4


  



  My problem is that the ffmpeg modifies the file changing other information regarding start, duration, progressive and fragmented flags...

  



  I've used this tool : https://download.tsi.telecom-paristech.fr/gpac/mp4box.js/filereader.html, to analyze my files in a more intuitive way :

  



  

  



  Do you have any clue on how to add tags without altering DASH segments in any other way ? Even if it requires using another tool different from ffmpeg.

  



  Thank you in advance !

  


• Deprecation error when using imageio.ffmpeg.download()

  29 novembre 2022, par SHASHIKUMAR B J

  I'm trying to merge the prerecorded videos using python Opencv.
But i'm getting the error while importing.

  



  "Traceback (most recent call last):&#xA;  File "video.py", line 4, in <module>&#xA;    from moviepy. editor import VideoFileClip,concatenate_videoclips &#xA;  File "/home/pi/.virtualenvs/cv/lib/python3.5/site-packages/moviepy/editor.py", line 26, in <module>&#xA;    imageio.plugins.ffmpeg.download()&#xA;  File "/home/pi/.virtualenvs/cv/lib/python3.5/site-packages/imageio/plugins/ffmpeg.py", line 40, in download&#xA;    "imageio.ffmpeg.download() has been deprecated. "&#xA;RuntimeError: imageio.ffmpeg.download() has been deprecated. Use &#x27;pip install imageio-ffmpeg&#x27; instead.&#x27;"&#xA;</module></module>

  



  would anyone please help to get out of this problem

  



  Here is the code :

  



  import cv2 
import os 
import time 
from moviepy.editor import VideoFileClip,concatenate_videoclips 
def vidcapt():
    a = time.strftime("%H,%M,%S")
    cap = cv2.VideoCapture(0)
    fourcc = cv2.VideoWriter_fourcc(*'XVID')
    out = cv2.VideoWriter(a+'.avi', fourcc, 24.0, (640,480))
    t1 = time.time()
    while(cap.isOpened()):
            ret, frame = cap.read() 
            if ret == True:
                    out.write(frame)
                    cv2.imshow('frame',frame)
                    t2 = time.time()
                    time_diff = t2-t1
                    if time_diff >= 5:
                            break
            else:
                    break
    cap.release()
    out.release()
    cv2.destroyAllWindows()

while True:
        vidcapt()


clip1 = VideoFileClip("11,05,42.avi")
clip2 = VideoFileClip("11,05,47.avi").subclip(50,60)
final_clip = concatenate_videoclips([clip1,clip2])
final_clip.write_videofile("merged.avi")


  


• Added nosniff header to prevent IE download dialogs.

  28 juillet 2011, par Sebastian Tschan

  m example/upload.php Added nosniff header to prevent IE download dialogs. Thanks to Don Bowden for the hint.