[FFmpeg-trac] #479(undetermined:new): AVStream.start_time incorrect for Sony XDCAM-EX files

[FFmpeg]

#479: AVStream.start_time incorrect for Sony XDCAM-EX files
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             Reporter:  rmk          |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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 All samples of Sony XDCAM-EX files start with two B-frames (presentation
 order) and then an I-frame. The two B-frames decode fine. The pictures
 look good in all cases. However, AVStream.start_time for these streams is
 always returned as the PTS of the first I-frame. Since the field is
 documented as the PTS of the first frame I thought this behavior is an
 error since I assume that "first" is meant as in presentation order as I
 thought the start_time field was used for things like seek offset
 calculations but I might be wrong here. Otherwise it would be good to make
 the documentation more specific here.

 I uploaded a sample (66MB) to

 http://www.datafilehost.com/download-abdaeffe.html

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/479>
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