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Mot : - Tags -/MediaSPIP 0.2

Autres articles (7)

  • Ajouter notes et légendes aux images

    7 février 2011, par

    Pour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
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  • Les formats acceptés

    28 janvier 2010, par

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
    ffmpeg -codecs ffmpeg -formats
    Les format videos acceptés en entrée
    Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

  • Les vidéos

    21 avril 2011, par

    Comme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
    Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
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Sur d’autres sites (2239)

  • h264_mp4toannexb filter failed to receive output packet while ffmpeg concat

    10 août 2022, par AlexZheda

    I am writing a very easy concat script for a list of videos.

    



    (for %i in (*.mp4) do @echo file '%i') > mylist.txt

    



    ffmpeg -safe 0 -f concat -i mylist.txt -c copy merged.mp4

    



    Yet the log says something weird h264_mp4toannexb filter failed to receive output packet”
Those files are rendered in VLC, but at certain timestamps they start to disallow moving the playtime cursor. I suspect that might be the case but I do not see much from the failed files.

    



    The file(s) it fails on has the following description (ffmpeg -i fn.mp4)
enter image description here

    



    EDIT : Truncated stats from all of the files in order.

    



    [{'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 2715 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1664 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1438 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1473 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1479 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1502 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1514 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1581 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1600 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1814 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1136 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1747 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1872 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1538 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 2839 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1595 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1733 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1623 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1634 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1564 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1635 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1674 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1809 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1650 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1773 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1643 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1802 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1766 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1809 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1641 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1812 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1984 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1787 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1912 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1839 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1903 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1826 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1900 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1773 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1799 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1933 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 2023 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1971 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 2071 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1997 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1692 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1785 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1864 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 2007 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
 {'Stream #0:0': '    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 2049:2048 DAR 683:384], 1897 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)',
  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
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  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
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  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)'},
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  'Stream #0:1': '    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 127 kb/s (default)'}]


    


  • What is Google Analytics data sampling and what’s so bad about it ?

    16 août 2019, par Joselyn Khor — Analytics Tips, Development

    What is Google Analytics data sampling, and what’s so bad about it ?

    Google (2019) explains what data sampling is :

    “In data analysis, sampling is the practice of analysing a subset of all data in order to uncover the meaningful information in the larger data set.”[1]

    This is basically saying instead of analysing all of the data, there’s a threshold on how much data is analysed and any data after that will be an assumption based on patterns.

    Google’s (2019) data sampling thresholds :

    Ad-hoc queries of your data are subject to the following general thresholds for sampling :
    [Google] Analytics Standard : 500k sessions at the property level for the date range you are using
    [Google] Analytics 360 : 100M sessions at the view level for the date range you are using (para. 3) [2]

    This threshold is limiting because your data in GA may become more inaccurate as the traffic to your website increases.

    Say you’re looking through all your traffic data from the last year and find you have 5 million page views. Only 500K of that 5 million is accurate ! The data for the remaining 4.5 million (90%) is an assumption based on the 500K sample size.

    This is a key weapon Google uses to sell to large businesses. In order to increase that threshold for more accurate reporting, upgrading to premium Google Analytics 360 for approximately US$150,000 per year seems to be the only choice.

    What’s so bad about data sampling ?

    It’s unfair to say sampled data is to be disregarded completely. There is a calculation ensuring it is representative and can allow you to get good enough insights. However, we don’t encourage it as we don’t just want “good enough” data. We want the actual facts.

    In a recent survey sent to Matomo customers, we found a large proportion of users switched from GA to Matomo due to the data sampling issue.

    The two reasons why data sampling isn’t preferable : 

    1. If the selected sample size is too small, you won’t get a good representative of all the data. 
    2. The bigger your website grows, the more inaccurate your reports will become.

    An example of why we don’t fully trust sampled data is, say you have an ecommerce store and see your GA revenue reports aren’t matching the actual sales data, due to data sampling. In GA you may be seeing revenue for the month as $1 million, instead of actual sales of $800K.

    The sampling here has caused an inaccuracy that could have negative financial implications. What you get in the GA report is an estimated dollar figure rather than the actual sales. Making decisions based on inaccurate data can be costly in this case. 

    Another disadvantage to sampled data is that you might be missing out on opportunities you would’ve noticed if you were given a view of the whole. E.g. not being able to see real patterns occurring due to the data already being predicted. 

    By not getting a chance to see things as they are and only being able to jump to the conclusions and assumptions made by GA is risky. The bigger your business grows, the less you can risk making business decisions based on assumptions that could be inaccurate. 

    If you feel you could be missing out on opportunities because your GA data is sampled data, get 100% accurately reported data. 

    The benefits of 100% accurate data

    Matomo doesn’t use data sampling on any of our products or plans. You get to see all of your data and not a sampled data set.

    Data quality is necessary for high impact decision-making. It’s hard to make strategic changes if you don’t have confidence that your data is reliable and accurate.

    Learn about how Matomo is a serious contender to Google Analytics 360. 

    Now you can import your Google Analytics data directly into your Matomo

    If you’re wanting to make the switch to Matomo but worried about losing all your historic Google Analytics data, you can now import this directly into your Matomo with the Google Analytics Importer tool.


    Take the challenge !

    Compare your Google Analytics data (sampled data) against your Matomo data, or if you don’t have Matomo data yet, sign up to our 30-day free trial and start tracking !

    References :

    [1 & 2] About data sampling. (2019). In Analytics Help About data sampling. Retrieved August 14, 2019, from https://support.google.com/analytics/answer/2637192

  • How to make your plugin multilingual – Introducing the Piwik Platform

    29 octobre 2014, par Thomas Steur — Development

    This is the next post of our blog series where we introduce the capabilities of the Piwik platform (our previous post was Generating test data – Introducing the Piwik Platform). This time you’ll learn how to equip your plugin with translations. Users of your plugin will be very thankful that they can use and translate the plugin in their language !

    Getting started

    In this post, we assume that you have already set up your development environment and created a plugin. If not, visit the Piwik Developer Zone where you’ll find the tutorial Setting up Piwik and other Guides that help you to develop a plugin.

    Managing translations

    Piwik is available in over 50 languages and comes with many translations. The core itself provides some basic translations for words like “Visitor” and “Help”. They are stored in the directory /lang. In addition, each plugin can provide its own translations for wordings that are used in this plugin. They are located in /plugins/*/lang. In those directories you’ll find one JSON file for each language. Each language file consists in turn of tokens that belong to a group.

    {
    
    "MyPlugin":{
    
        "BlogPost": "Blog post",
    
        "MyToken": "My translation",
    
        "InteractionRate": "Interaction Rate"
    
    }
    
}

    A group usually represents the name of a plugin, in this case “MyPlugin”. Within this group, all the tokens are listed on the left side and the related translations on the right side.

    Building a translation key

    As you will later see to actually translate a word or a sentence you’ll need to know the corresponding translation key. This key is built by combining a group and a token separated by an underscore. You can for instance use the key MyPlugin_BlogPost to get a translation of “Blog post”. Defining a new key is as easy as adding a new entry to the “MyPlugin” group.

    Providing default translations

    If a translation cannot be found then the English translation will be used as a default. Therefore, you should always provide a default translation in English for all keys in the file en.json (ie, /plugins/MyPlugin/lang/en.json).

    Adding translations for other languages

    This is as easy as creating new files in the lang subdirectory of your plugin. The filename consists of a 2 letter ISO 639-1 language code completed by the extension .json. This means German translations go into a file named de.json, French ones into a file named fr.json. To see a list of languages you can use have a look at the /lang directory.

    Reusing translations

    As mentioned Piwik comes with quite a lot of translations. You can and should reuse them but you are supposed to be aware that a translation key might be removed or renamed in the future. It is also possible that a translation key was added in a recent version and therefore is not available in older versions of Piwik. We do not currently announce any of such changes. Still, 99% of the translation keys do not change and it is therefore usually a good idea to reuse existing translations. Especially when you or your company would otherwise not be able to provide them. To find any existing translation keys go to Settings => Translation search in your Piwik installation. The menu item will only appear if the development mode is enabled.

    Translations in PHP

    Use the Piwik::translate() function to translate any text in PHP. Simply pass any existing translation key and you will get the translated text in the language of the current user in return. The English translation will be returned in case none for the current language exists.

    $translatedText = Piwik::translate('MyPlugin_BlogPost');

    Translations in Twig Templates

    To translate text in Twig templates, use the translate filter.

    {{ 'MyPlugin_BlogPost'|translate }}

    Contributing translations to Piwik

    Did you know you can contribute translations to Piwik ? In case you want to improve an existing translation, translate a missing one or add a new language go to Piwik Translations and sign up for an account. You won’t need any knowledge in development to do this.

    Advanced features

    Of course there are more useful things you can do with translations. For instance you can use placeholders like %s in your translations and you can use translations in JavaScript as well. In case you want to know more about those topics check out our Internationalization guide. Currently, this guide only covers translations but we will cover more topics like formatting numbers and handling currencies in the future.

    Congratulations, you have learnt how to make your plugin multilingual !

    If you have any feedback regarding our APIs or our guides in the Developer Zone feel free to send it to us.

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