<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <META NAME="Generator" CONTENT="MS Exchange Server version 6.5.7654.12"> <TITLE>RE: [gst-devel] How to Set Buffer Size Within Plugin</TITLE> </HEAD> <BODY>  Tracing the pipeline debug messages (noted below) showed that during the first fixate_caps() call, the input/output video sizes have been fixated already. Before that in the transform_caps() calls, the video sizes range [1, 32767], until the output video size is fixated into the input video size 320x240 & then fixate_caps() is called. I couldn't know the input video size, before the output video size has been set by the pipeline application. Using GstBaseTransform, the two functions called before setcap() are: 1) trans_class->transform_caps = GST_DEBUG_FUNCPTR (gst_mosaick_transform_caps); 2) trans_class->fixate_caps = GST_DEBUG_FUNCPTR (gst_mosaick_fixate_caps); ===== ... gst_mosaick_transform_caps,direction=1 caps=video/x-raw-rgb, bpp=(int)32, depth=(int)24, endianness=(int)4321, red_mask=(int)65280, green_mask=(int)16711680, blue_mask=(int)-16777216, width=(int)[ 1, 32767 ], height=(int)[ 1, 32767 ], framerate=(fraction)[ 0/ 1, 2147483647/1 ] gst_mosaick_transform_caps,direction=1 caps=video/x-raw-rgb, bpp=(int)32, depth=(int)24, endianness=(int)4321, red_mask=(int)-16777216, green_mask=(int)16711680, blue_mask=(int)65280, width=(int)[ 1, 32767 ], height=(int)[ 1, 32767 ], framerate=(fraction)[ 0/ 1, 2147483647/1 ] 0:00:01.046875000   888   02133EC0 WARN           basetransform gstbasetransform.c:1075:gst_base_transform_acceptcaps_default:<mosaick0> transform could not transform 02137920 in anything we support gst_mosaick_transform_caps,direction=1 caps=video/x-raw-rgb, bpp=(int)32, depth=(int)24, endianness=(int)4321, red_mask=(int)65280, green_mask=(int)16711680, blue_mask=(int)-16777216, width=(int)[ 1, 32767 ], height=(int)[ 1, 32767 ], framerate=(fraction)[ 0/ 1, 2147483647/1 ] gst_mosaick_transform_caps,direction=1 caps=video/x-raw-rgb, bpp=(int)32, depth=(int)24, endianness=(int)4321, red_mask=(int)-16777216, green_mask=(int)16711680, blue_mask=(int)65280, width=(int)[ 1, 32767 ], height=(int)[ 1, 32767 ], framerate=(fraction)[ 0/ 1, 2147483647/1 ] gst_mosaick_transform_caps,direction=1 caps=video/x-raw-rgb, bpp=(int)32, depth=(int)24, endianness=(int)4321, red_mask=(int)65280, green_mask=(int)16711680, blue_mask=(int)-16777216, width=(int)[ 1, 32767 ], height=(int)[ 1, 32767 ], framerate=(fraction)[ 0/ 1, 2147483647/1 ] gst_mosaick_transform_caps,direction=1 caps=video/x-raw-rgb, bpp=(int)32, depth=(int)24, endianness=(int)4321, red_mask=(int)-16777216, green_mask=(int)16711680, blue_mask=(int)65280, width=(int)[ 1, 32767 ], height=(int)[ 1, 32767 ], framerate=(fraction)[ 0/ 1, 2147483647/1 ] gst_mosaick_transform_caps,direction=2 caps=video/x-raw-rgb, bpp=(int)32, depth=(int)24, endianness=(int)4321, red_mask=(int)-16777216, green_mask=(int)16711680, blue_mask=(int)65280, width=(int)320, height=(int)240, framerate=(fraction)15/1 gst_mosaick_fixate_caps GST_PAD_SINK 2 dimensions already set to 320x240, not fixating 0:00:01.078125000   888   02133EC0 INFO         GST_PERFORMANCE imgconvert.c:3367:img_convert: no direct path to convert colorspace from bgr24 -> bgrx32 -----Original Message----- From: Tim-Philipp Müller [<A HREF="mailto:t.i.m@zen.co.uk">mailto:t.i.m@zen.co.uk</A>] Sent: Fri 10/15/2010 4:09 PM To: gstreamer-devel@lists.sourceforge.net Subject: Re: [gst-devel] How to Set Buffer Size Within Plugin On Fri, 2010-10-15 at 15:51 -0400, Greg Wunder wrote: > Following up with one more question: > > Let be more specific, on the set_cap function: > The trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_mosaick_set_caps); Ah, so your element is based on GstBaseTransform/GstVideoFilter - that's useful to know. > static gboolean > gst_mosaick_set_caps (GstBaseTransform * trans, GstCaps * in, GstCaps > * out) > { >   GstMosaick *mosaick = GST_MOSAICK (trans); >   gboolean ret; > >   ret = gst_video_format_parse_caps (in, &mosaick->format, > &mosaick->from_width, &mosaick->from_height); >   ret &= gst_video_format_parse_caps (out, NULL, &mosaick->to_width, > &mosaick->to_height); > > ... > } > > In the above function I can get the input video size, but the output > is also being fixed. > Where could you to change the output video size? Maybe you're looking for the transform_caps virtual method? Cheers  -Tim ------------------------------------------------------------------------------ Download new Adobe(R) Flash(R) Builder(TM) 4 The new Adobe(R) Flex(R) 4 and Flash(R) Builder(TM) 4 (formerly Flex(R) Builder(TM)) enable the development of rich applications that run across multiple browsers and platforms. Download your free trials today! <A HREF="http://p.sf.net/sfu/adobe-dev2dev">http://p.sf.net/sfu/adobe-dev2dev</A> _______________________________________________ gstreamer-devel mailing list gstreamer-devel@lists.sourceforge.net <A HREF="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</A> </BODY> </HTML>