[FFmpeg-trac] #1570(avdevice:open): libv4l2: error dequeuing buf: Resource temporarily unavailable

[FFmpeg]

#1570: libv4l2: error dequeuing buf: Resource temporarily unavailable
-------------------------------------+-------------------------------------
             Reporter:  llarevo      |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:  avdevice
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
  video4linux, video4linux2,         |  Reproduced by developer:  0
  v4l2.c, regression, capture,       |
  analog, tv                         |
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by ubitux):

 Just to make sure, can you try this hack with an upstream FFmpeg?

 {{{
 diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c
 index 2808e13..0acd3da 100644
 --- a/libavdevice/v4l2.c
 +++ b/libavdevice/v4l2.c
 @@ -694,7 +694,7 @@ static int v4l2_set_parameters(AVFormatContext *s1)
          }
      }

 -    if (framerate_q.num && framerate_q.den) {
 +    if (0 && framerate_q.num && framerate_q.den) {
          av_log(s1, AV_LOG_DEBUG, "Setting time per frame to %d/%d\n",
                 framerate_q.den, framerate_q.num);
          tpf->numerator   = framerate_q.den;
 }}}

 (Since according to your report 70f7736 looks faulty).

 Also, could you post a complete command line and output with -debug 1
 (with an up-to-date tree but without the hack above) so we can have more
 information on the issue?

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1570#comment:2>
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