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• Python : How to clip/trim required part from the video and move the trimmed video file to other directory

  4 avril 2021, par saurabh

  I'm trying to remove duplicate segments from videos from a directory and paste these trimmed videos to other directory.

  


  For example :

  


  I've following directory structure for saving live rtsp stream (each 1 min long) :-

  


  Live_videos
------2021-04-04
      ------stream1
            -------14 36 08.avi( 1 min)
                   14 37 08.avi( Saved only till 14 37 39 mark due to disconnect with stream1 camera)
                   14 38 35.avi( 1 min)
            stream2
            -------14 36 15.avi( 1 min)
                   14 37 15.avi( 1 min)
                   14 38 14.avi( 1 min)


  


  So, the disconnect and reconnect time are 14 37 40 and 14 38 34 respectively which will be sent to some other server and that server will search for videos saved in their machine which contains segments from the given timestamps and sends the video file in following directory structure : -

  


  Edge_videos
-----------2021-04-04
           ----------stream1
                     -------14 36 35.avi
                     -------14 37 35.avi


  


  Now, you can see that the received video files have the required segments from disconnect period as well as duplicate segments which are already saved in Live_videos directory.

  


  How do I remove the duplicate segments from the received videos and move only the required trimmed video file to the Live_videos----> stream1 directory and delete all the files from Edge_videos afterwards.

  


• Download highest quality audio from YouTube using youtube-dl

  3 juin 2020, par darvast

  I'm using this command :

  



  youtube-dl -f bestaudio --extract-audio --audio-format "opus" --add-metadata -o "%(playlist_index)s-%(title)s.%(ext)s" "https://www.youtube.com/playlist?list=OLAK5uy_lWRq5MhPNthDDe1nYXtlekDA40wtrpKE0"


  



  Here's the available streams :

  



  [info] Available formats for 6t1dErgAglk:
format code  extension  resolution note
249          webm       audio only tiny   58k , opus @ 50k (48000Hz), 416.34KiB
250          webm       audio only tiny   72k , opus @ 70k (48000Hz), 516.52KiB
140          m4a        audio only tiny  130k , m4a_dash container, mp4a.40.2@128k (44100Hz), 1.06MiB
251          webm       audio only tiny  131k , opus @160k (48000Hz), 923.79KiB
278          webm       140x144    144p   32k , webm container, vp9, 25fps, video only, 159.74KiB
160          mp4        140x144    144p   54k , avc1.4d400b, 25fps, video only, 278.62KiB
242          webm       232x240    240p   71k , vp9, 25fps, video only, 321.29KiB
134          mp4        350x360    360p   96k , avc1.4d4015, 25fps, video only, 303.75KiB
133          mp4        232x240    240p  124k , avc1.4d400c, 25fps, video only, 651.46KiB
243          webm       350x360    360p  126k , vp9, 25fps, video only, 545.77KiB
135          mp4        466x480    360p  174k , avc1.4d401e, 25fps, video only, 534.97KiB
244          webm       466x480    360p  215k , vp9, 25fps, video only, 1003.20KiB
136          mp4        698x720    720p  305k , avc1.4d401f, 25fps, video only, 942.76KiB
137          mp4        1048x1080  1080p  494k , avc1.640020, 25fps, video only, 1.49MiB
247          webm       698x720    720p  593k , vp9, 25fps, video only, 1.97MiB
248          webm       1048x1080  1080p  768k , vp9, 25fps, video only, 3.81MiB
18           mp4        350x360    360p  213k , avc1.42001E, 25fps, mp4a.40.2@ 96k (44100Hz), 1.73MiB
22           mp4        698x720    720p  242k , avc1.64001F, 25fps, mp4a.40.2@192k (44100Hz) (best)


  



  When I run the above command it seems to be converting m4a to opus : https://prnt.sc/st2l8u

  



  I'm wondering why it's doing that instead of getting it from the webm container ?

  


• How to replace the video track of a part of a video file ?

  17 juin 2019, par yukashima huksay

  I have an mp4 file like this(same format but longer) :

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'N1.2.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: mp42mp41
  
      creation_time   : 2018-10-31T13:44:21.000000Z
  
    Duration: 00:28:54.21, start: 0.000000, bitrate: 10295 kb/s
  
      Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 9972 kb/s, 50 fps, 50 tbr, 50k tbn, 100 tbc (default)
  
      Metadata:
  
        creation_time   : 2018-10-31T13:44:21.000000Z
  
        handler_name    : ?Mainconcept Video Media Handler
  
        encoder         : AVC Coding
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-10-31T13:44:21.000000Z
  
        handler_name    : #Mainconcept MP4 Sound Media Handler

  I also have another video file that is 3 minutes long. and has no audio. What is the fastest way to encode the other video in a way that it is encoded like my main video and then replace the last three minutes of the video track of my original video with this ?

  In other words.
  I have video A that is 1 hour long. With the encoding shown above.

  I have video B that is 3 minutes long with no audio. with a random encoding.

  I want to have video C with the same encoding and same audio as A. But it’s video track would be the first 57 minutes of A + B(which is 3 minutes).

  I want to do this as fast as possible so I would like to not re encode A.

  I know how to concatenate two videos, I use this command :

  ffmpeg -f concat -i files.txt -c copy res.mp4