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  • Des sites réalisés avec MediaSPIP

    2 mai 2011, par

    Cette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
    Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.

  • Gestion des droits de création et d’édition des objets

    8 février 2011, par

    Par défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

Sur d’autres sites (8783)

  • ffmpeg download mp3 in chunks slower than whole file

    6 août 2021, par loretoparisi

    I'm programmatically downloading in Python mp3 file's as wav chunks, seeking at position with ss and t with ffmpeg resulting in a sequence of ffmpeg commands

    


    ffmpeg -i https://file-examples-com.github.io/uploads/2017/11/file_example_MP3_5MG.mp3 -acodec pcm_s16le -ac 1 -ar 44100 -ss 0:08:55.780000 -t 0:01:00.000000 -sn -vn -y -f wav pipe:1
ffmpeg -i https://file-examples-com.github.io/uploads/2017/11/file_example_MP3_5MG.mp3 -acodec pcm_s16le -ac 1 -ar 44100 -ss -ss 0:09:55.780000 -t 0:01:00.000000 -sn -vn -y -f wav pipe:1
ffmpeg -i https://file-examples-com.github.io/uploads/2017/11/file_example_MP3_5MG.mp3 -acodec pcm_s16le -ac 1 -ar 44100 -ss -ss -ss 0:10:55.780000 -t 0:01:00.000000 -sn -vn -y -f wav pipe:1
...


    


    executed via concurrent.futures.ThreadPoolExecutor in this way :

    


    with concurrent.futures.ThreadPoolExecutor(max_workers=NTHREADS) as executor:
        for i,cmd in enumerate(process_list):
            futures.append(executor.submit(downloader.chunk_download,(cmd,i)))

        for future in concurrent.futures.as_completed(futures):
            try:
                completed.append(future.result())
            except Exception as e:print(e)
    completed.sort() 
    for k,c in enumerate(completed):
        if not k:
            waveform = c[1]
        else:
            waveform = np.append(waveform,c[1])


    


    where chunk_download is concat the chunks into the whole waveform

    


    def chunk_download(self,args):
        cmd=args[0]
        i=args[1]
        print('Downloading chunk n° %i' % i)

        print( ' '.join(cmd))
        process = subprocess.run(cmd,
                            stdout=subprocess.PIPE,
                            stderr=subprocess.PIPE,
                            bufsize=10**8)
        #buffer, stderr = process.communicate()
        buffer = process.stdout
        stderr = process.stderr
        print('chunk n° %i DOWNLOADED' % i)
        # convert to signal
        chunk_waveform = np.frombuffer(buffer=buffer, dtype=np.uint16, offset=8*44)
        chunk_waveform = chunk_waveform.astype(self.dtype)  
        print(len(chunk_waveform)/44100) 

        return i,chunk_waveform


    


    this works ok, but if I download the whole mp3, executing the command in cmd like :

    


    ffmpeg -i https://file-examples-com.github.io/uploads/2017/11/file_example_MP3_5MG.mp3 -acodec pcm_s16le -ac 1 -ar 44100 -sn -vn -y -f wav pipe:1


    


    It will take less time than the concurrent chunks download for the same file length, while I would expect the opposite. Could be this related to ffmpeg threading option (param --thread ?). If not, why the concurrent chunks download operation is slower ?

    


  • When downloading HLS video with FFMPEG it does not download the audio

    3 août 2021, par Thiago Franklin

    I have a problem, when I try to download an HLS video with FFMPEG, it downloads the video track, but it doesn't find the AUDIO. When running the HLS .m3u8 file in a player, it plays normally, audio and video, but when trying to download, it shows an error message saying that the audio cannot be found.

    


    I'm running the following command :

    


    ffmpeg.exe -i "https://teste-etv.espiritismo.tv/437602.m3u8" -codec:a libmp3lame -b:a 96k teste-hls.mp3

    


    Displays the following error when trying to download the audio :

    


    [hls @ 0000021b5d9ad940] Skip ('#EXT-X-VERSION:3')
[hls @ 0000021b5d9ad940] Skip ('#EXT-X-INDEPENDENT-SEGMENTS')
[hls @ 0000021b5d9ad940] Opening 'https://appsetv.b-cdn.net/hls/437602/437602-1080p.m3u8' for reading
[hls @ 0000021b5d9ad940] Skip ('#EXT-X-VERSION:3')
[https @ 0000021b5e10ee00] Opening 'https://appsetv.b-cdn.net/hls/437602/437602-720p.m3u8' for reading
[hls @ 0000021b5d9ad940] Skip ('#EXT-X-VERSION:3')
[https @ 0000021b5e10ee00] Opening 'https://appsetv.b-cdn.net/hls/437602/437602-540p.m3u8' for reading
[hls @ 0000021b5d9ad940] Skip ('#EXT-X-VERSION:3')
[https @ 0000021b5e10ee00] Opening 'https://appsetv.b-cdn.net/hls/437602/437602-360p.m3u8' for reading
[hls @ 0000021b5d9ad940] Skip ('#EXT-X-VERSION:3')
[hls @ 0000021b5d9ad940] Opening 'https://appsetv.b-cdn.net/hls/437602/437602-1080p_00001.ts' for reading
[hls @ 0000021b5d9ad940] Opening 'https://appsetv.b-cdn.net/hls/437602/437602-1080p_00002.ts' for reading
[hls @ 0000021b5d9ad940] Opening 'https://appsetv.b-cdn.net/hls/437602/437602-720p_00001.ts' for reading
[hls @ 0000021b5d9ad940] Opening 'https://appsetv.b-cdn.net/hls/437602/437602-720p_00002.ts' for reading
[hls @ 0000021b5d9ad940] Opening 'https://appsetv.b-cdn.net/hls/437602/437602-540p_00001.ts' for reading
[hls @ 0000021b5d9ad940] Opening 'https://appsetv.b-cdn.net/hls/437602/437602-540p_00002.ts' for reading
[hls @ 0000021b5d9ad940] Opening 'https://appsetv.b-cdn.net/hls/437602/437602-360p_00001.ts' for reading
[hls @ 0000021b5d9ad940] Opening 'https://appsetv.b-cdn.net/hls/437602/437602-360p_00002.ts' for reading
[hls @ 0000021b5d9ad940] Could not find codec parameters for stream 1 (Audio: aac ([15][0][0][0] / 0x000F), 0 channels, fltp): unspecified sample rate
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[hls @ 0000021b5d9ad940] Could not find codec parameters for stream 3 (Audio: aac ([15][0][0][0] / 0x000F), 0 channels, fltp): unspecified sample rate
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[hls @ 0000021b5d9ad940] Could not find codec parameters for stream 5 (Audio: aac ([15][0][0][0] / 0x000F), 0 channels, fltp): unspecified sample rate
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[hls @ 0000021b5d9ad940] Could not find codec parameters for stream 7 (Audio: aac ([15][0][0][0] / 0x000F), 0 channels, fltp): unspecified sample rate
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, hls, from 'https://appsetv.b-cdn.net/hls/437602/437602.m3u8':
  Duration: 00:01:41.00, start: 2.083333, bitrate: 0 kb/s
  Program 0
    Metadata:
      variant_bitrate : 2509173
    Stream #0:0: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 24 fps, 24 tbr, 90k tbn, 48 tbc
    Metadata:
      variant_bitrate : 2509173
    Stream #0:1: Audio: aac ([15][0][0][0] / 0x000F), 0 channels, fltp
    Metadata:
      variant_bitrate : 2509173
  Program 1
    Metadata:
      variant_bitrate : 1205957
    Stream #0:2: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 24 fps, 24 tbr, 90k tbn, 48 tbc
    Metadata:
      variant_bitrate : 1205957
    Stream #0:3: Audio: aac ([15][0][0][0] / 0x000F), 0 channels, fltp
    Metadata:
      variant_bitrate : 1205957
  Program 2
    Metadata:
      variant_bitrate : 1165600
    Stream #0:4: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 960x540 [SAR 1:1 DAR 16:9], 24 fps, 24 tbr, 90k tbn, 48 tbc
    Metadata:
      variant_bitrate : 1165600
    Stream #0:5: Audio: aac ([15][0][0][0] / 0x000F), 0 channels, fltp
    Metadata:
      variant_bitrate : 1165600
  Program 3
    Metadata:
      variant_bitrate : 656245
    Stream #0:6: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 24 fps, 24 tbr, 90k tbn, 48 tbc
    Metadata:
      variant_bitrate : 656245
    Stream #0:7: Audio: aac ([15][0][0][0] / 0x000F), 0 channels, fltp
    Metadata:
      variant_bitrate : 656245
Output #0, mp3, to 'teste-hls.mp3':
Output file #0 does not contain any stream


    


  • Download multiple files with ffmpeg, keep one stream from each (according to default stream selection), and then mux them into single file ?

    23 août 2021, par Bernard

    With ffmpeg, I can download m3u8 streams with the following command :

    


    ffmpeg -i http://example.com/test.m3u8 -c copy output.mp4


    


    The above command will keep the best quality video and audio (to some definition of 'best').

    


    However, I'm faced with a situation where I have several m3u8 streams, all of them possibly containing zero or more video or audio streams. I would like to take at most one video and audio from each url (according to ffmpeg's definition of 'best'), and mux them together into the final mp4 file.

    


    This is essentially what I want :

    


    ffmpeg -i http://example.com/test0.m3u8 -c copy output0.mp4
ffmpeg -i http://example.com/test1.m3u8 -c copy output1.mp4
ffmpeg -i http://example.com/test2.m3u8 -c copy output2.mp4
ffmpeg -i output0.mp4 -i output1.mp4 -i output2.mp4 -map 0 -map 1 -map 2 -c copy output.mp4


    


    Is there any way to do it without the temporary files ?

    


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