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diff --git a/gst-libs/ext/mplex/mpegconsts.h b/gst-libs/ext/mplex/mpegconsts.h
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+
+/*
+ *  mpegconsts.c:  Video format constants for MPEG and utilities for display
+ *                 and conversion to format used for yuv4mpeg
+ *
+ *  Copyright (C) 2001 Andrew Stevens <andrew.stevens@philips.com>
+ *
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of version 2 of the GNU General Public License
+ *  as published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#ifndef __MPEGCONSTS_H__
+#define __MPEGCONSTS_H__
+
+
+#include "yuv4mpeg.h"
+
+
+typedef unsigned int mpeg_framerate_code_t;
+typedef unsigned int mpeg_aspect_code_t;
+
+extern const mpeg_framerate_code_t mpeg_num_framerates;
+extern const mpeg_aspect_code_t mpeg_num_aspect_ratios[2];
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Convert MPEG frame-rate code to corresponding frame-rate
+ *  y4m_fps_UNKNOWN = { 0, 0 } = Undefined/resrerved code.
+ */
+
+y4m_ratio_t
+mpeg_framerate( mpeg_framerate_code_t code );
+
+
+/*
+ * Look-up MPEG frame rate code for a (exact) frame rate.
+ *  0 = No MPEG code defined for frame-rate
+ */
+
+mpeg_framerate_code_t 
+mpeg_framerate_code( y4m_ratio_t framerate );
+
+
+/*
+ * Convert floating-point framerate to an exact ratio.
+ *  Uses a standard MPEG rate, if it finds one within MPEG_FPS_TOLERANCE
+ *  (see mpegconsts.c), otherwise uses "fps:1000000" as the ratio.
+ */
+
+y4m_ratio_t
+mpeg_conform_framerate( double fps );
+
+
+/*
+ * Convert MPEG aspect ratio code to corresponding aspect ratio
+ *
+ * WARNING: The semantics of aspect ratio coding *changed* between
+ * MPEG1 and MPEG2.  In MPEG1 it is the *pixel* aspect ratio. In
+ * MPEG2 it is the (far more sensible) aspect ratio of the eventual
+ * display.
+ *
+ */
+
+y4m_ratio_t
+mpeg_aspect_ratio( int mpeg_version,  mpeg_aspect_code_t code );
+
+/*
+ * Look-up MPEG aspect ratio code for an aspect ratio - tolerance
+ * is Y4M_ASPECT_MULT used by YUV4MPEG (see yuv4mpeg_intern.h)
+ *
+ * WARNING: The semantics of aspect ratio coding *changed* between
+ * MPEG1 and MPEG2.  In MPEG1 it is the *pixel* aspect ratio. In
+ * MPEG2 it is the (far more sensible) aspect ratio of the eventual
+ * display.
+ *
+ */
+
+mpeg_aspect_code_t 
+mpeg_frame_aspect_code( int mpeg_version, y4m_ratio_t aspect_ratio );
+
+/*
+ * Look-up MPEG explanatory definition string aspect ratio code for an
+ * aspect ratio code
+ *
+ */
+
+const char *
+mpeg_aspect_code_definition( int mpeg_version,  mpeg_aspect_code_t code  );
+
+/*
+ * Look-up MPEG explanatory definition string aspect ratio code for an
+ * frame rate code
+ *
+ */
+
+const char *
+mpeg_framerate_code_definition( mpeg_framerate_code_t code  );
+
+const char *
+mpeg_interlace_code_definition( int yuv4m_interlace_code );
+
+
+/*
+ * Guess the correct MPEG aspect ratio code,
+ *  given the true sample aspect ratio and frame size of a video stream
+ *  (and the MPEG version, 1 or 2).
+ *
+ * Returns 0 if it has no good answer.
+ *
+ */
+mpeg_aspect_code_t 
+mpeg_guess_mpeg_aspect_code(int mpeg_version, y4m_ratio_t sampleaspect,
+			    int frame_width, int frame_height);
+
+/*
+ * Guess the true sample aspect ratio of a video stream,
+ *  given the MPEG aspect ratio code and the actual frame size
+ *  (and the MPEG version, 1 or 2).
+ *
+ * Returns y4m_sar_UNKNOWN if it has no good answer.
+ *
+ */
+y4m_ratio_t 
+mpeg_guess_sample_aspect_ratio(int mpeg_version,
+			       mpeg_aspect_code_t code,
+			       int frame_width, int frame_height);
+
+
+#ifdef __cplusplus
+};
+#endif
+
+
+
+#endif /* __MPEGCONSTS_H__ */