[FFmpeg-trac] #3720(avformat:open): Support decoding of Xunlei XV file

[FFmpeg]

#3720: Support decoding of Xunlei XV file
-------------------------------------+------------------------------------
             Reporter:  ElDimentio   |                    Owner:
                 Type:  enhancement  |                   Status:  open
             Priority:  wish         |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  flv          |               Blocked By:
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  0            |
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Comment (by barsnick):

 To me it seems these files can be decoded just fine using
 {{{
 ffmpeg -f flv -i 1.xv -f null -
 }}}
 (or remuxed to a file which apparently contains the complete video and is
 perfectly playable).

 Just the information from the scrambled FLV header is missing:
 {{{
 [flv @ 0x55baa1f2b240] Read FLV header error, input file is not a standard
 FLV format, first PreviousTagSize0 always is 0
 [flv @ 0x55baa1f2b240] Packet mismatch 32 11 11
 }}}
 implying you can't probe bitrate or duration.

 Would it not suffice to recognize these files properly as FLV in the first
 step?

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3720#comment:8>
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