[FFmpeg-trac] #8719(undetermined:new): Some facebook mpd urls cause parser error: missing root node

[FFmpeg]

#8719: Some facebook mpd urls cause parser error: missing root node
-------------------------------------+-------------------------------------
             Reporter:  farleylai    |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 Some facebook live streaming mpd urls (retrieved by youtube-dl -g) causes
 parser error for missing root node as follows. There is quite a chance
 encountering such live streams with parsing issues. In comparison, VLC can
 play the mpd url without any issue. Hopefully, what is missing can be
 clarified.

 PS: if expired, there should be a bunch at
 https://www.facebook.com/watch/live/?ref=watch. Select the three dot
 option on the top right for "Copy Link" to retrieve with tools like
 youtube-dl.

 How to reproduce:
 {{{
 $ ffprobe "`youtube-dl -g
 https://www.facebook.com/FOX35Orlando/videos/625902281343117/`"
 ffprobe version 4.2.3 Copyright (c) 2007-2020 the FFmpeg developers
   built with gcc 7.3.0 (crosstool-NG 1.23.0.449-a04d0)
   configuration: --prefix=/home/ml/farleylai/miniconda3/envs/sinet37
 --cc=/home/ml/farleylai/miniconda3/envs/sinet37/conda-
 bld/ffmpeg_1591228974768/_build_env/bin/x86_64-conda_cos6-linux-gnu-cc
 --disable-doc --disable-openssl --enable-avresample --enable-demuxer=dash
 --enable-gnutls --enable-gpl --enable-hardcoded-tables --enable-
 libfreetype --enable-libopenh264 --enable-libx264 --enable-pic --enable-
 pthreads --enable-shared --enable-static --enable-version3 --enable-
 libxml2 --enable-zlib --enable-libmp3lame
   libavutil      56. 31.100 / 56. 31.100
   libavcodec     58. 54.100 / 58. 54.100
   libavformat    58. 29.100 / 58. 29.100
   libavdevice    58.  8.100 / 58.  8.100
   libavfilter     7. 57.100 /  7. 57.100
   libavresample   4.  0.  0 /  4.  0.  0
   libswscale      5.  5.100 /  5.  5.100
   libswresample   3.  5.100 /  3.  5.100
   libpostproc    55.  5.100 / 55.  5.100
 https://video-dfw5-1.xx.fbcdn.net/hvideo-cln2-lla/_nc_cat-1/v/rN-
 Rvo2XZWMKe7t0sTc4Q/live-dash/dash-abr-ibr-
 audio/10159331661282573.mpd?_nc_rl=AfAufcjJJdNRPaeM&ms=m_CN&oh=31fb460a19411926ca3d40b8b7d89cd0&oe=5EDF1F27:242:
 parser error : AttValue: ' expected
           initialization="../live-ld-a/10159331661282573_0-in
                                                              ^
 https://video-dfw5-1.xx.fbcdn.net/hvideo-cln2-lla/_nc_cat-1/v/rN-
 Rvo2XZWMKe7t0sTc4Q/live-dash/dash-abr-ibr-
 audio/10159331661282573.mpd?_nc_rl=AfAufcjJJdNRPaeM&ms=m_CN&oh=31fb460a19411926ca3d40b8b7d89cd0&oe=5EDF1F27:242:
 parser error : attributes construct error
           initialization="../live-ld-a/10159331661282573_0-in
                                                              ^
 https://video-dfw5-1.xx.fbcdn.net/hvideo-cln2-lla/_nc_cat-1/v/rN-
 Rvo2XZWMKe7t0sTc4Q/live-dash/dash-abr-ibr-
 audio/10159331661282573.mpd?_nc_rl=AfAufcjJJdNRPaeM&ms=m_CN&oh=31fb460a19411926ca3d40b8b7d89cd0&oe=5EDF1F27:242:
 parser error : Couldn't find end of Start Tag SegmentTemplate line 239
           initialization="../live-ld-a/10159331661282573_0-in
                                                              ^
 https://video-dfw5-1.xx.fbcdn.net/hvideo-cln2-lla/_nc_cat-1/v/rN-
 Rvo2XZWMKe7t0sTc4Q/live-dash/dash-abr-ibr-
 audio/10159331661282573.mpd?_nc_rl=AfAufcjJJdNRPaeM&ms=m_CN&oh=31fb460a19411926ca3d40b8b7d89cd0&oe=5EDF1F27:242:
 parser error : Premature end of data in tag Representation line 232
           initialization="../live-ld-a/10159331661282573_0-in
                                                              ^
 https://video-dfw5-1.xx.fbcdn.net/hvideo-cln2-lla/_nc_cat-1/v/rN-
 Rvo2XZWMKe7t0sTc4Q/live-dash/dash-abr-ibr-
 audio/10159331661282573.mpd?_nc_rl=AfAufcjJJdNRPaeM&ms=m_CN&oh=31fb460a19411926ca3d40b8b7d89cd0&oe=5EDF1F27:242:
 parser error : Premature end of data in tag AdaptationSet line 179
           initialization="../live-ld-a/10159331661282573_0-in
                                                              ^
 https://video-dfw5-1.xx.fbcdn.net/hvideo-cln2-lla/_nc_cat-1/v/rN-
 Rvo2XZWMKe7t0sTc4Q/live-dash/dash-abr-ibr-
 audio/10159331661282573.mpd?_nc_rl=AfAufcjJJdNRPaeM&ms=m_CN&oh=31fb460a19411926ca3d40b8b7d89cd0&oe=5EDF1F27:242:
 parser error : Premature end of data in tag Period line 22
           initialization="../live-ld-a/10159331661282573_0-in
                                                              ^
 https://video-dfw5-1.xx.fbcdn.net/hvideo-cln2-lla/_nc_cat-1/v/rN-
 Rvo2XZWMKe7t0sTc4Q/live-dash/dash-abr-ibr-
 audio/10159331661282573.mpd?_nc_rl=AfAufcjJJdNRPaeM&ms=m_CN&oh=31fb460a19411926ca3d40b8b7d89cd0&oe=5EDF1F27:242:
 parser error : Premature end of data in tag MPD line 2
           initialization="../live-ld-a/10159331661282573_0-in
                                                              ^
 [dash @ 0x559df1de81c0] Unable to parse 'https://video-dfw5-1.xx.fbcdn.net
 /hvideo-cln2-lla/_nc_cat-1/v/rN-Rvo2XZWMKe7t0sTc4Q/live-dash/dash-abr-ibr-
 audio/10159331661282573.mpd?_nc_rl=AfAufcjJJdNRPaeM&ms=m_CN&oh=31fb460a19411926ca3d40b8b7d89cd0&oe=5EDF1F27'
 - missing root node
 https://video-dfw5-1.xx.fbcdn.net/hvideo-cln2-lla/_nc_cat-1/v/rN-
 Rvo2XZWMKe7t0sTc4Q/live-dash/dash-abr-ibr-
 audio/10159331661282573.mpd?_nc_rl=AfAufcjJJdNRPaeM&ms=m_CN&oh=31fb460a19411926ca3d40b8b7d89cd0&oe=5EDF1F27:
 Invalid data found when processing input
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8719>
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