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Original commit message from CVS: Some final fixes for the v4lsrc elements. * remove software sync thread (use GST_ELEMENT_THREAD_SUGGESTED instead) * make all src elements threadsafe * fix num_buffer argument setting in v4l2src (VIDIOC_S_PARM) * re-add bufsize (RO) for v4lmjpegsrc * fix the A/V sync calculation in all elements (spvf=GST_SECOND/fps, not GST_SECOND*fps) * probably some more crap.... With all this, it actually works quite well. The TODO files describes the next steps in order to make a full-featured video recorder based on these elements and GStreamer (bottom). Making a simple recorder should be fairly easy now, btw.
42 lines
1.6 KiB
Text
42 lines
1.6 KiB
Text
TODO list (short term):
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=======================
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* v4lsrc/v4lmjpegsrc/v4l2src: fix interlacing (not handled at all...)
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TODO list (long term):
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======================
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* v4lmpegsrc (*hint* MPEG card needed *hint*)
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* v4l2sink
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* BSD-videosrc (bktr)
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* color correction (brightness, hue, etc.)
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* gamma correction
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Useful Documentation:
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=====================
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MJPEG/V4L API : ./videodev_mjpeg.h
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Linux/V4L API : /usr/include/linux/videodev.h or
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http://roadrunner.swansea.uk.linux.org/v4l.shtml
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Linux/V4L2 API: /usr/include/linux/videodev2.h or
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http://www.thedirks.org/v4l2/
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(kernel patches: http://bytesex.org/patches/)
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BSD/Meteor API: /usr/include/machine/ioctl_meteor.h
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mjpegtools : http://www.sourceforge.net/projects/mjpeg
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Capturing:
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==========
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* sound is the master clock
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* it's probably a good idea to create an audiosource element:
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- autodetect alsa/oss
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- first try alsa, then oss... they work the same internally
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* same for videosource:
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- autodetect v4l/v4l2 + mjpeg capabilities
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- for this, just open device using v4l2element. On success:
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+ use v4l2
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- on failure:
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+ use v4lelement and query for MJPEG capabilities
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+ if that's available, combine caps of v4lmjpegsrc and v4lsrc
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* both sources run in their own GstThread with a high priority
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* an encoder element takes care of encoding + muxing. A toplevel element
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(reverse of spider) is probably a good idea here. How? Don't know...
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* format negotiation via filtered caps
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* statistics via listening to the frame_{lost,inserted,deleted,captures}
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signals and GST_PAD_QUERY_POSITION (gst_pad_query())
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