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• How to increase video quality of combined video and audio file using ffmpeg

  29 juin 2022, par jettzeong

  I have a scraper script that I am using which utilizes PRAW module to scrape reddit for media.

  


  To downloaded reddit videos, I have written the code below :

  


          video_url = submission.media['reddit_video']['fallback_url'] 
        audio_url = submission.url + "/audio"
        print('Video: ' + video_url)
        print('Audio: ' + audio_url)
        video = requests.get(video_url).content
        audio = requests.get(audio_url).content
        videoname = "D:\\Bot\\reddit_scrape\\" + submission.id + '_video.mp4'
        audioname = "D:\\Bot\\reddit_scrape\\" + submission.id + '_audio.mp4'
        filename = "D:\\Bot\\reddit_scrape\\" + submission.id + '.mp4'
        
        with open(videoname, 'wb') as handler:
            handler.write(video)
        with open(audioname, 'wb') as handler:
            handler.write(audio)

        os.system(f"ffmpeg -i {videoname} -i {audioname} -map 0:v -map 1:a -c:v copy {filename}")
        os.remove(videoname)
        os.remove(audioname)
        save_to_dict(id = submission.id, ext = filename, txt = submission.title)


  


  What this code does is that it fetches the video and audio seperately from reddit, and combines them via ffmpeg.

  


  However, the video created by this block of code is very blurry and has low resolution.

  


  May I know what kind of argument I can use to make my video file play with higher resolution ?

  


• Changing Video's rotation metadata without rotating video

  2 décembre 2016, par Arshdeep Singh

  I have two Videos. One is from front camera and one is from back camera. When I concatenate these two. one gets vertically inverted in merged file. Video taken from front camera having rotation metadata 270. And Video taken from back camera having rotation metadata 90. While concatenation one gets inverted, while I don’t want. Please help....

• Issue with video.js playing AES encrypted video

  2 septembre 2021, par r3dge

  I'm trying to use video.js to play an encrypted HLS video. The AES 128 encryption has been done using this method : FFmpeg video encryption

  


  Here is the html code :

  


  &#xA;    &#xA;    <source src="http://192.168.56.1/enc/prog_index.m3u8" type="application/x-mpegURL">&#xA;</source>

  
 
 
 


  Video.js is loaded using CDN :

  


  <code class="echappe-js">&lt;script src=&quot;https://unpkg.com/video.js/dist/video.js&quot;&gt;&lt;/script&gt;&#xA;&#xA;&#xA;&lt;script src=&quot;https://unpkg.com/@videojs/http-streaming/dist/videojs-http-streaming.js&quot;&gt;&lt;/script&gt;&#xA;

  


  The player is loading and appears in the browser but the video can not be played.

  


  I get two warnings in the console :

  


  video.js:159 VIDEOJS : WARN : A plugin named "reloadSourceOnError" already exists. You may want to avoid re-registering plugins !

  


  VIDEOJS : WARN : Problem encountered with playlist 0-http://192.168.56.1/enc/prog_index.m3u8. Trying again since it is the only playlist.

  


  Server side i'm using Apache with Symphony 5. The server return a HTTP 200 status for the first ts file of the video. When i press the play button of the player seems to retry downloading. It get a 200 each time but the video is not played.

  


  Update : i tried to play the same video without encryption and it works. The problem seems to be due to the encryption itself.

  


  Thanks in advance for any help on that issue.