Recherche avancée

Sur d’autres sites (11701)

• Python - How to convert .mkv videos to .mp4 videos

  2 septembre 2022, par sabari

  I have two folders.
Download folder and converted folder.

  


  I want to convert files from .mkv to .mp4

  


  import os
import boto3
import ffmpeg
from os import path, makedirs

downloadFolder = 'D:'+os.sep+'abc'+os.sep+'def'+os.sep+'downloaded'
convertedFolder = 'D:'+os.sep+'abc'+os.sep+'def'+os.sep+'converted'

#find the number of files in the Downloaded folder
initial_count = 0
for path in os.listdir(downloadFolder):
    if os.path.isfile(os.path.join(downloadFolder, path)):
        initial_count += 1
print("Files downloaded")
print(initial_count)

# convert all files from .mkv to .mp4
source_folder = downloadFolder
for file_name in os.listdir(source_folder):
    try:
        # construct full file path
        source = source_folder + os.sep + file_name
        print("source"+source)
        destination = convertedFolder +os.sep +file_name
        # copy only files
        if os.path.isfile(source):
            name, ext = os.path.splitext(file_name)
            outFileName = convertedFolder + os.sep + name + '.mp4'
            # convert .mkv into .mp4
            ffmpeg.input(source).output(outFileName).run()
    except Exception as e:
        # print("Exception "+ key['Key'])
        print("error")
        print(e)


  


  The below is the error i get because of ffmpeg

  


  error
[WinError 2] The system cannot find the file specified


  


  I also tried moviepy library. But couldnt solve.
Please let me know a solution.

  


  Thanks.

  


• FFMPEG - Concat 3 videos with one of the videos becoming a picture in picture overlay

  7 décembre 2022, par John

  I have been getting to grips with FFMPEG for the last few days...so please excuse my lack of knowledge. It's very much early days.

  


  I need to join 3 video elements together with one of the videos becoming an overlay at a specific time.

  


  intro.mp4

  


  mainvideo.mp4

  


  endboard.mp4

  


  I need the intro.mp4 to bolt on to the front of the mainvideo.mp4 and then ideally with 20 seconds to go before the end of the mainvideo.mp4, I need the endboard.mp4 video to be bolted on to the sequence and take over the frame. When this happens, I then need the mainvideo.mp4 to be overlayed in the top left corner and continue playing seamlessly through the transition.

  


  I also need the audio from the main video to play until the end of the video.

  


  I currently achieve this but putting all of the video elements into Premiere and exporting them out but I know this process can be much quicker with FFMPEG. For reference, here is an example of how it looks. If you skip to the end of the video below (just after 45 mins into the video) as the credits are rolling you will see the main video transition to the picture in picture overlay, and the endboard video take over the main frame.

  


  https://www.youtube.com/watch?v=RtgIvWxZUwM&t=2723s

  


  There will be lots of mainvideo.mp4 files that this will be applied to individually, and the lengths of these videos will always be different. I am hoping that there is a way to have the transition to the endboard.mp4 happen relative to 20secs before the end of the files. If not I guess I would have to manually input the time I want this change over transition to happen.

  


  I roughly understand in theory what needs to be done, but being so new to this world I am really unsure of how something this complicated would be pieced together.

  


  If there is anyone out there that can help me , it would be greatly appreciated !

  


  I have got my head around the process of merging videos together with a simple concat command and I can see that overlaying a video in the top left corner of the frame is also possible...but my brain cannot figure out the sequence of events that needs to happen to bolt the intro video on to the main video....and then have the main video transition into the picture in picture overlay video at a specific time, while also bolting on the endboard video for the main video to overlay onto.

  


  Any help for a complete newb would be so unbelievably appreciated !

  


• opencv cmake didn't find latest ffmpeg libs

  15 décembre 2018, par Eric

  Here the output of the ffmpeg command :

  ffmpeg version git-2014-01-20-4014b40 Copyright (c) 2000-2014 the FFmpeg developers
  
  built on Jan 20 2014 14:18:13 with gcc 4.8 (Ubuntu/Linaro 4.8.1-10ubuntu9)
  
  configuration: --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --    enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --  enable-libx264 --enable-nonfree --enable-x11grab
  
  libavutil      52. 63.100 / 52. 63.100
  
  libavcodec     55. 48.101 / 55. 48.101
  
  libavformat    55. 25.100 / 55. 25.100
  
  libavdevice    55.  5.102 / 55.  5.102
  
  libavfilter     4.  1.100 /  4.  1.100
  
  libswscale      2.  5.101 /  2.  5.101
  
  libswresample   0. 17.104 /  0. 17.104
  
  libpostproc    52.  3.100 / 52.  3.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

  When running CmakeLists.txt for Opencv 2.4.8 installation :

  cmake -DCMAKE_BUILD_TYPE=RELEASE -DCMAKE_INSTALL_PREFIX=/usr/local -DBUILD_NEW_PYTHON_SUPPORT=ON -DWITH_TBB=ON -DWITH_V4L=ON -DWITH_QT=ON -DWITH_OPENGL=ON -DWITH_EIGEN=ON -DWITH_OPENEXR=ON ..

  I get :

  --   Video I/O:
  
  --     DC1394 1.x:                  NO
  
  --     DC1394 2.x:                  YES (ver 2.2.1)
  
  --     FFMPEG:                      YES
  
  --       codec:                     YES (ver 53.35.0)
  
  --       format:                    YES (ver 53.21.1)
  
  --       util:                      YES (ver 51.22.1)
  
  --       swscale:                   YES (ver 2.1.0)
  
  --       gentoo-style:              YES
  
  --     GStreamer:                   
  
  --       base:                      YES (ver 0.10.36)
  
  --       app:                       YES (ver 0.10.36)
  
  --       video:                     YES (ver 0.10.36)

  My question : Why opencv didn’t link with the lastest libavutil, libavcodec, etc ...