v4l2src
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How do you specify the capture format and resolution on the V4L2src plugin? Where is the mpegts generated, or is it captured from the device in that format? Does the mpegts contain raw YUV/RGB data or is it encoded?
Thank you! Chuck Crisler _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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Generally by setting the caps in whatever language you are using. Looking at some of the command line examples, you can see it getting set to what they want....
http://www.noah.org/wiki/video_4_linux_2_notes mpegts or any mpeg is just about always YUV (420 mostly, but in higher end encoders 422) On Mon, Aug 6, 2012 at 12:39 PM, Chuck Crisler <[hidden email]> wrote: How do you specify the capture format and resolution on the V4L2src plugin? Where is the mpegts generated, or is it captured from the device in that format? Does the mpegts contain raw YUV/RGB data or is it encoded? _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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Thank you for the prompt reply. Your samples show using a caps filter, don't they? Does that cause the source filter to actually capture in the desired format, or does it convert what is captured to that format, or either, depending on the capabilities of the actual device? You said that mpeg is generally YUV. Does that mean that it won't contain H264? Can't you encapsulate H264 in mpegts?
On Mon, Aug 6, 2012 at 3:46 PM, Brian Quandt <[hidden email]> wrote: Generally by setting the caps in whatever language you are using. Looking at some of the command line examples, you can see it getting set to what they want.... _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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Generally speaking, Transport streams convey MPEG data, which is encoded in the YUV colorspace. Presently, you'll see MPEG1, 2, and MPEG4 (and it's various flavours, including AVC/H264...) Yes, the caps cause a negotiation with the camera to send what it's supposed/can do On Mon, Aug 6, 2012 at 1:05 PM, Chuck Crisler <[hidden email]> wrote: Thank you for the prompt reply. Your samples show using a caps filter, don't they? Does that cause the source filter to actually capture in the desired format, or does it convert what is captured to that format, or either, depending on the capabilities of the actual device? You said that mpeg is generally YUV. Does that mean that it won't contain H264? Can't you encapsulate H264 in mpegts? _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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