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If the duration of the v4l2object is GST_CLOCK_TIME_NONE, because the sink did not specify a framerate in the caps and the driver accepts the framerate, the decoder element uses GST_CLOCK_TIME_NONE to calculate and set the element latency. While this is a bug of the capture driver, the decoder element should not use the invalid duration to calculate a latency, but print a warning instead. https://bugzilla.gnome.org/show_bug.cgi?id=779466 |
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.. | ||
ext | ||
gstv4l2.c | ||
gstv4l2allocator.c | ||
gstv4l2allocator.h | ||
gstv4l2bufferpool.c | ||
gstv4l2bufferpool.h | ||
gstv4l2colorbalance.c | ||
gstv4l2colorbalance.h | ||
gstv4l2deviceprovider.c | ||
gstv4l2deviceprovider.h | ||
gstv4l2object.c | ||
gstv4l2object.h | ||
gstv4l2radio.c | ||
gstv4l2radio.h | ||
gstv4l2sink.c | ||
gstv4l2sink.h | ||
gstv4l2src.c | ||
gstv4l2src.h | ||
gstv4l2transform.c | ||
gstv4l2transform.h | ||
gstv4l2tuner.c | ||
gstv4l2tuner.h | ||
gstv4l2videodec.c | ||
gstv4l2videodec.h | ||
gstv4l2vidorient.c | ||
gstv4l2vidorient.h | ||
Makefile.am | ||
meson.build | ||
README | ||
tuner.c | ||
tuner.h | ||
tunerchannel.c | ||
tunerchannel.h | ||
tunernorm.c | ||
tunernorm.h | ||
v4l2-utils.c | ||
v4l2-utils.h | ||
v4l2_calls.c | ||
v4l2_calls.h |
v4l2 plugins ============ The idea is a bit the same as the idea for the v4l1 plugins. We want one generic v4l2element, and a few child objects (probably only two: v4l2src and v4l2sink): /-------- v4l2src v4l2element ---= \-------- v4l2sink Both v4l2src and v4l2sink have a uncompressed and a compressed recording-/playback-mode. Since this is all part of v4l2, the 'client' of these elements, i.e. an application using v4l2src/v4l2sink, will hardly notice this. All capsnego stuff is done inside, and the plugin knows which formats are compressed and which are not. Please note that the v4l1 and the v4l2 plugins are *not* compatible concerning properties. Naming has been kept the same where possible, but in some cases, properties had to be removed or added to make full use of v4l2. V4L2 API: http://linux.bytesex.org/v4l2/. http://v4l2spec.bytesex.org/ /usr/include/linux/videodev2.h or Kernel patches available from http://dl.bytesex.org/patches/. Articles: http://lwn.net/Articles/203924/