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ldecicco / tapas

TAPAS is a tool for rapid prototyping of adaptive streaming algorithms and video streaming traffic generation

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Error playing MPD

Waldmann94 opened this issue · comments

commented

I am trying to use my own mpd with your TAPAS Player. When using your suggested MPD things work fine, but I receive the following Errors:
2016-12-15 13:50:50+0100 [-] Log opened.
2016-12-15 13:50:50+0100 [-] trying to open fifo
2016-12-15 13:50:50+0100 [-] URLtoMyMPD.mpd
2016-12-15 13:50:50+0100 [-] Traceback (most recent call last):
2016-12-15 13:50:50+0100 [-] File "TAPAS/play.py", line 139, in
2016-12-15 13:50:50+0100 [-] select_player()
2016-12-15 13:50:50+0100 [-] File "TAPAS/play.py", line 131, in select_player
2016-12-15 13:50:50+0100 [-] player.play()
2016-12-15 13:50:50+0100 [-] File "TAPAS/TapasPlayer.py", line 123, in play
2016-12-15 13:50:50+0100 [-] self.parser.loadPlaylist()
2016-12-15 13:50:50+0100 [-] File "TAPAS/parsers/DASH_mp4Parser.py", line 104, in loadPlaylist
2016-12-15 13:50:50+0100 [-] if "@range" in json_representation[j]["SegmentBase"]["Initialization"].keys():
2016-12-15 13:50:50+0100 [-] KeyError: 'SegmentBase'

Looking at both MPD files I see the following for any one representation:

<SegmentTemplate duration="2000" initialization="$RepresentationID$/init.mp4" media="$RepresentationID$/$Number$.m4s" startNumber="1" timescale="1000"/>
<Representation bandwidth="1018420" codecs="avc1.4D401F" frameRate="24" height="480" id="V4" scanType="progressive" mimeType="video/mp4" width="1128"/>

<Representation bandwidth="869460" codecs="avc1.4d401e" height="480" id="3" mimeType="video/mp4" width="854">
        <BaseURL>car-20120827-87.mp4</BaseURL>
        <SegmentBase indexRange="708-1183">
          <Initialization range="0-707" />
        </SegmentBase>
      </Representation>

Does your player only accept this one certain form of encoding?

Best regards
Silvio Waldmann

commented

Hi there,

Indeed I've encountered the same problems when working with TAPAS. In fact it does not accept all variants of MPEG DASH manifest files. I've created my test sequences with mp4box and the following parameters:

mp4box -dash 2000 -profile ondemand -single-segment your_input_file.mp4

TAPAS should be able to work with those.