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• Cannot remove the video file created through ffmpeg save

  29 juin 2022, par light

  It gives this error :
os.remove("output.mp4")
PermissionError : [WinError 32] The process cannot access the file because it is being used by another process : 'output.mp4

  


  I am first downloading a reddit video (with separate audio and video file) by joining audio and video files together using ffmpeg

  


      with open("video.mp4", "wb") as f:
        g = requests.get(video_url, stream=True)
        f.write(g.content)

    with open("audio.mp3", "wb") as f:
        g = requests.get(audio_url, stream=True)
        f.write(g.content)

    os.system("ffmpeg -i video.mp4 -i audio.mp3 -c copy output.mp4")
    os.remove("audio.mp3")
    os.remove("video.mp4")


  


  After this I am uploading it to YouTube Using YouTube Api and then finally deleting it from the system. I tried everything I thought would solve this error.

  


          os.system("exit")
        os.system("echo 'q' >stop") 
        os.system("exit()")
        os.remove("output.mp4")


  


  But it gives me Permission Error. Please help me with this problem I have no idea what could be wrong.

  


  This is the method I am using to upload the file to YouTube.

  


        request_body = {
            'snippet': {
                'categoryI': 19,
                'title': f'{item.title}',
                'description': description,
                'tags': Tags
                },
            'status': {
                'privacyStatus': 'public',
                'publishAt': upload_date_time,
                'selfDeclaredMadeForKids': False, 
                },
            'notifySubscribers': False
            }


      mediaFile = MediaFileUpload(r"output.mp4")

      response_upload = service.videos().insert(
            part='snippet,status',
            body=request_body,
            media_body=mediaFile
        ).execute


  


• Node merge multiple .m3u8 playlist as single stream

  28 juin 2022, par jr3000

  I have two .m3u8 files example : file.m3u8 and file2.com. The streams are not live, I am using npm m3u8 package to possible create a dynamic playlist.

  


  


  


  var m3u8 = require('m3u8');
var fs   = require('fs');
const express = require("express")
const app = express()
const port = 8080
const cors = require("cors")
const M3U8 = require("m3u8");
app.use(cors())
const async = require("async")

app.get('/',  (req, res) => {
    var playlist = M3U8.M3U.create();
    playlist.set('targetDuration', '10');
    playlist.set('playlistType', 'VOD');
    playlist.set('version', '3');
    playlist.set('mediaSequence', '0');

    var parser = m3u8.createStream();
    const arr = ['/file.m3u8', '/file2.m3u8']
    async.each(arr, (itm, next) => {
        var file   = fs.createReadStream(itm);
        file.pipe(parser);
        parser.on('item', function(item) {
            playlist.addPlaylistItem(item);
        });
        next()
    }, () => {
        res.type('application/vnd.apple.mpegurl').send(playlist.toString());
    })
})
app.listen(port, () => console.log(`App started`));

  


  


  



  Has anyone ever accomplish merging two .m3u8 urls to be sent out as a single stream. Thanks

  


• avformat/movenc : Support alpha channel for AVIF

  1er juin 2022, par Vignesh Venkatasubramanian

  avformat/movenc : Support alpha channel for AVIF
  AVIF specification allows for alpha channel as an auxiliary item (in
  
  case of still images) or as an auxiliary track (in case of animated
  
  images).  Add support for both of these. The AVIF muxer will take
  
  exactly two streams (when alpha is present) as input (first one being
  
  the YUV planes and the second one being the alpha plane).
  The input has to come from two different images (one of it color and
  
  the other one being alpha), or it can come from a single file
  
  source with the alpha channel extracted using the "alphaextract"
  
  filter.
  Example using alphaextract :
  
  ffmpeg -i rgba.png -filter_complex "[0:v]alphaextract[a]" -map 0 -map "[a]" -still-picture 1 avif_with_alpha.avif
  Example using two sources (first source can be in any pixel format and
  
  the second source has to be in monochrome grey pixel format) :
  
  ffmpeg -i color.avif -i grey.avif -map 0 -map 1 -c copy avif_with_alpha.avif
  The generated files pass the compliance checks in Compliance Warden :
  
  https://github.com/gpac/ComplianceWarden
  libavif (the reference avif library) is able to decode the files
  
  generated using this patch.
  They also play back properly (with transparent background) in :
  
  1) Chrome
  
  2) Firefox (only still AVIF, no animation support)
  Reviewed-by : James Zern <jzern@google.com>
  
  Signed-off-by : Vignesh Venkatasubramanian <vigneshv@google.com>
  

  • [DH] libavformat/movenc.c
  • [DH] libavformat/movenc.h