Integrated the ffmpeg_interlace feature (Alexey Belyaev/Andrew Hamilton)

http://www.lavrsen.dk/twiki/bin/view/Motion/MotionffmpegDeinterlace

Enhanced the help text in motion.conf that heads the ffmpeg section
Renamed the option ffmpeg_filename to movie_filename to prepare for
future plugin architecture (Kenneth Lavrsen)

conf.c

@@ -531,7 +531,10 @@ config_param config_params[] = {
 	{
 	"ffmpeg_cap_new",
 	"\n############################################################\n"
-	"# Film (mpeg) File Output - ffmpeg based\n"
+	"# FFMPEG related options\n"
+	"# Film (mpeg) file output, and deinterlacing of the video input\n"
+	"# The options movie_filename and timelapse_filename are also used\n"
+	"# by the ffmpeg feature\n"
 	"############################################################\n\n"
 	"# Use ffmpeg to encode mpeg movies in realtime (default: off)",
 	CONF_OFFSET(ffmpeg_cap_new),
@@ -593,6 +596,15 @@ config_param config_params[] = {
 	copy_string,
 	print_string
 	},
+	{
+	"ffmpeg_deinterlace",
+	"# Use ffmpeg to deinterlace video. Necessary if you use an analog camera\n"
+	"# and see horizontal combing on moving objects in video or pictures.\n"
+	"# (default: off)",
+	CONF_OFFSET(ffmpeg_deinterlace),
+	copy_bool,
+	print_bool
+	},
 #endif /* HAVE_FFMPEG */
 
 	{
@@ -723,12 +735,13 @@ config_param config_params[] = {
 	},
 #ifdef HAVE_FFMPEG
 	{
-	"ffmpeg_filename",
+	"movie_filename",
 	"# File path for motion triggered ffmpeg films (mpeg) relative to target_dir\n"
 	"# Default: "DEF_MPEGPATH"\n"
 	"# Default value is equivalent to legacy oldlayout option\n"
 	"# For Motion 3.0 compatible mode choose: %Y/%m/%d/%H%M%S\n"
-	"# File extension .mpg or .avi is automatically added so do not include this",
+	"# File extension .mpg or .avi is automatically added so do not include this\n"
+	"# This option was previously called ffmpeg_filename",
 	CONF_OFFSET(mpegpath),
 	copy_string,
 	print_string

conf.h

@@ -59,6 +59,7 @@ struct config {
 	int ffmpeg_cap_motion;
 	int ffmpeg_bps;
 	int ffmpeg_vbr;
+	int ffmpeg_deinterlace;
 	const char *ffmpeg_video_codec;
 	int webcam_port;
 	int webcam_quality;

ffmpeg.c

@@ -575,4 +575,43 @@ AVFrame *ffmpeg_prepare_frame(struct ffmpeg *ffmpeg, unsigned char *y,
 	return picture;
 }
 
+
+/** ffmpeg_deinterlace
+ *      Make the image suitable for deinterlacing using ffmpeg, then deinterlace the picture.
+ * 
+ * Parameters
+ *      img     image in YUV420P format
+ *      width   image width in pixels
+ *      height  image height in pixels
+ *
+ * Returns
+ *      Function returns nothing.
+ *      img     contains deinterlaced image
+ */
+void ffmpeg_deinterlace(unsigned char *img, int width, int height)
+{
+	AVFrame *picture;
+	int width2 = width / 2;
+	
+	picture = avcodec_alloc_frame();
+	if (!picture) {
+		motion_log(LOG_ERR, 1, "Could not alloc frame");
+		return;
+	}
+	
+	picture->data[0] = img;
+	picture->data[1] = img+width*height;
+	picture->data[2] = picture->data[1]+(width*height)/4;
+	picture->linesize[0] = width;
+	picture->linesize[1] = width2;
+	picture->linesize[2] = width2;
+	
+	/* We assume using 'PIX_FMT_YUV420P' always */
+	avpicture_deinterlace((AVPicture *)picture, (AVPicture *)picture, PIX_FMT_YUV420P, width, height);
+	
+	av_free(picture);
+	
+	return;
+}
+
 #endif /* HAVE_FFMPEG */

ffmpeg.h

@@ -63,4 +63,7 @@ void ffmpeg_put_other_image(
 /* Closes the mpeg file. */
 void ffmpeg_close(struct ffmpeg *);
 
+/*Deinterlace the image. */
+void ffmpeg_deinterlace(unsigned char *, int, int);
+
 #endif /* _INCLUDE_FFMPEG_H_ */

motion.c

@@ -819,6 +819,13 @@ static void *motion_loop(void *arg)
 			}
 			cnt->missing_frame_counter = 0;
 			
+#ifdef HAVE_FFMPEG
+			/* Deinterlace the image with ffmpeg, before the image is modified. */
+			if(cnt->conf.ffmpeg_deinterlace) {
+				ffmpeg_deinterlace(newimg, cnt->imgs.width, cnt->imgs.height);
+			}
+#endif
+			
 			/* save the newly captured still virgin image to a buffer
 			 * which we will not alter with text and location graphics
 			 */