[Bug 732288] v4l2src: Failed to allocate a buffer

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=732288
  GStreamer | gst-plugins-good | git

Songwater <songwater> changed:

           What    |Removed                     |Added
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                 CC|                            |songwater at aliyun.com

--- Comment #3 from Songwater <songwater at aliyun.com> 2014-06-30 06:15:07 UTC ---
With version 1.3.3 ,My x264enc works fine, but x265enc have the same problem.
When this happened , the x265 encoder would have many frames to input without
encoded result to output. So this error may be caused by v4l2src buffer
occupied by x265encoder. I found that only 2 buffers allocated by default  in
v4l2src , if the encoder don't release the buffer , the v4l2src will has no
buffer to capture picture, the line in
/gst-plugins-good-1.3.3/sys/v4l2/gstv4l2allocator.c
 if (v4l2_ioctl (allocator->video_fd, VIDIOC_DQBUF, &buffer) < 0)
    goto error;
will report this error.
In gst-plugins-good-1.3.3/sys/v4l2/gstv4l2object.h, I change
GST_V4L2_MIN_BUFFERS from 2 to 32，my x265enc works fine with out that error,
but this change sounds so ugly . How to change the buffer numbers of the
v4l2src plug-in?

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