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FFmpeg/libavdevice

History

Giorgio Vazzana 514216d8a9 lavd/v4l2: read the correct time per frame from devices that support a standard ... Generally speaking, there are two types of v4l2 devices [1]: 1) devices that support a standard, like PAL or NTFS (tv cards, for example). For this class of devices the framerate is fixed by the standard (for example PAL uses 25 fps) and the v4l2 driver cannot usually negotiate a different framerate (unless it can skip frames on the driver side, to save I/O bandwidth). 2) devices for which the notion of standard does not make sense (webcams, for example). For these devices it is usually possibile to request a desidered framerate. In either case, the desidered frame rate can be requested when the VIDIOC_G_PARM ioctl returns the V4L2_CAP_TIMEPERFRAME flag in the capability field. Currently the code does not check for V4L2_CAP_TIMEPERFRAME and supports only the second category of devices, returning a time per frame of 0/0 for devices in the first group that do not permit to negotiate the framerate. This patch adds support to read the correct framerate in all cases. [1] http://linuxtv.org/downloads/v4l-dvb-apis/standard.html Signed-off-by: Stefano Sabatini <stefasab@gmail.com>		12 years ago
..
Makefile	Merge remote-tracking branch 'qatar/master'	13 years ago
alldevices.c	Merge commit 'a0b7e289075dccf223b7f407790d8a86fc5d77e8'	12 years ago
alsa-audio-common.c	Merge commit '97bf7c03b1338a867da52c159a2afecbdedcfa88'	12 years ago
alsa-audio-dec.c	Merge commit 'e6153f173a49e5bfa70b0c04d2f82930533597b9'	12 years ago
alsa-audio-enc.c	Merge commit '36ef5369ee9b336febc2c270f8718cec4476cb85'	13 years ago
alsa-audio.h	Merge remote-tracking branch 'qatar/master'	12 years ago
avdevice.c	Merge remote-tracking branch 'qatar/master'	13 years ago
avdevice.h	Merge remote-tracking branch 'qatar/master'	13 years ago
bktr.c	bktr: fix warning: missing braces around initializer	12 years ago
caca.c	caca: fix 10l typo	12 years ago
dshow.c	dshow: call CoUninitialize() on dshow_read_close()	12 years ago
dshow_capture.h	dshow: handle events in graph	12 years ago
dshow_common.c	dshow: rename dshow.h to avoid conflict with system header of equal name	13 years ago
dshow_enummediatypes.c	dshow: rename dshow.h to avoid conflict with system header of equal name	13 years ago
dshow_enumpins.c	dshow: rename dshow.h to avoid conflict with system header of equal name	13 years ago
dshow_filter.c	dshow: Use NO_DSHOW_STRSAFE for all dshow header inclusions	12 years ago
dshow_pin.c	dshow: Use NO_DSHOW_STRSAFE for all dshow header inclusions	12 years ago
dv1394.c	dv1394: Swap the min and max values of the 'standard' option	12 years ago
dv1394.h	miscellaneous typo fixes	12 years ago
fbdev.c	Merge remote-tracking branch 'qatar/master'	12 years ago
iec61883.c	Update iec61883 to handle multiple devices, and allow	12 years ago
jack_audio.c	Merge commit 'e6153f173a49e5bfa70b0c04d2f82930533597b9'	12 years ago
lavfi.c	lavd/lavfi: fix float.h include.	12 years ago
libavdevice.v	Add symbol versioning for shared libraries	15 years ago
libcdio.c	Merge commit '80ac87c13dc8c6c063e26a464c5c542357c0583f'	12 years ago
libdc1394.c	Merge commit 'cb45553f577f8e0ebfe05d3287e1b6fa5859b967'	12 years ago
openal-dec.c	Merge commit 'e6153f173a49e5bfa70b0c04d2f82930533597b9'	12 years ago
oss_audio.c	oss: warn when non block mode cannot be enabled.	12 years ago
pulse.c	Merge commit 'e6153f173a49e5bfa70b0c04d2f82930533597b9'	12 years ago
sdl.c	Merge commit '716d413c13981da15323c7a3821860536eefdbbb'	12 years ago
sndio_common.c	Merge commit '36ef5369ee9b336febc2c270f8718cec4476cb85'	13 years ago
sndio_common.h	Merge remote-tracking branch 'qatar/master'	12 years ago
sndio_dec.c	Merge commit 'e6153f173a49e5bfa70b0c04d2f82930533597b9'	12 years ago
sndio_enc.c	Merge commit '36ef5369ee9b336febc2c270f8718cec4476cb85'	13 years ago
timefilter.c	Merge commit 'cb45553f577f8e0ebfe05d3287e1b6fa5859b967'	12 years ago
timefilter.h	timefilter: allow to evaluate at other times.	13 years ago
v4l.c	Merge commit '716d413c13981da15323c7a3821860536eefdbbb'	12 years ago
v4l2.c	lavd/v4l2: read the correct time per frame from devices that support a standard	12 years ago
version.h	lavd/v4l2: add list_standards option	12 years ago
vfwcap.c	Merge commit '716d413c13981da15323c7a3821860536eefdbbb'	12 years ago
x11grab.c	x11grab: fix mixed declaration and code	12 years ago