[FFmpeg-trac] #5850(avdevice:open): Using Hauppauge HD-PVR fails (streaming I/O)

FFmpeg trac at avcodec.org
Fri Sep 16 22:10:37 EEST 2016

#5850: Using Hauppauge HD-PVR fails (streaming I/O)
             Reporter:  naums       |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  normal      |                Component:  avdevice
              Version:  git-master  |               Resolution:
             Keywords:  v4l2        |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |

Comment (by naums):

 Replying to [comment:5 cehoyos]:
 > Replying to [comment:4 naums]:
 > > to the first to commenters: these work but only for mere seconds, then
 the device shuts itself off and the video freezes.
 > Not sure I understand:
 > The following works perfectly well?
 > {{{
 > $ cat /dev/video0 > test.mp4
 > }}}

 This works perfectly well.

 > But this does not?
 > {{{
 > $ cat /dev/video0 | ffplay -
 > }}}

 This works for about five to ten seconds, the video freezes and the device
 shuts its light off, the last frame sticks. There is btw. a latency of
 about four seconds from executing the command to seeing the first frame
 (the device introduced some latency of about a second, the rest seems to
 be ffplay).

 Is there any way to give more information that might help you? Is it for
 example possible to see the filling-percentage of internal video buffers?

Ticket URL: <https://trac.ffmpeg.org/ticket/5850#comment:6>
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