* is passed through strftime so that it is easy to imprint the date and
* time onto the image.
*
+ * You may also overlay an image (even semi-transparent) like TV stations do.
+ * You may move either the text or the image around your video to create
+ * scrolling credits, for example.
+ *
+ * Text fonts are being looked for in FONTPATH
+ *
* Options:
*
* -c <color> The color of the text
* -F <fontname> The font face and size
* -t <text> The text
* -f <filename> The filename to read text from
- * -x <num> X coordinate to start text
- * -y <num> Y coordinate to start text
+ * -x <expresion> X coordinate of text or image
+ * -y <expresion> Y coordinate of text or image
+ * -i <filename> The filename to read a image from
+ *
+ * Expresions are functions of:
+ * N // frame number (starting at zero)
+ * H // frame height
+ * W // frame width
+ * h // image height
+ * w // image width
+ * X // previous x
+ * Y // previous y
*
+
+ Examples:
+
+ FONTPATH="/cygdrive/c/WINDOWS/Fonts/"
+ FONTPATH="$FONTPATH:/usr/share/imlib2/data/fonts/"
+ FONTPATH="$FONTPATH:/usr/X11R6/lib/X11/fonts/TTF/"
+ export FONTPATH
+
+ ffmpeg -i input.avi -vhook \
+ 'vhook/imlib2.dll -x W*(0.5+0.25*sin(N/47*PI))-w/2 -y H*(0.5+0.50*cos(N/97*PI))-h/2 -i /usr/share/imlib2/data/images/bulb.png'
+ -acodec copy -sameq output.avi
+
+ ffmpeg -i input.avi -vhook \
+ 'vhook/imlib2.dll -c red -F Vera.ttf/20 -x 150+0.5*N -y 70+0.25*N -t Hello'
+ -acodec copy -sameq output.avi
+
* This module is very much intended as an example of what could be done.
- * For example, you could overlay an image (even semi-transparent) like
- * TV stations do. You can manipulate the image using imlib2 functions
- * in any way.
*
* One caution is that this is an expensive process -- in particular the
* conversion of the image into RGB and back is time consuming. For some
* the text into a bitmap and then combine it directly into the YUV
* image. However, this code is fast enough to handle 10 fps of 320x240 on a
* 900MHz Duron in maybe 15% of the CPU.
+
+ * See further statistics on Pentium4, 3GHz, FFMpeg is SVN-r6798
+ * Input movie is 20.2 seconds of PAL DV on AVI
+ * Output movie is DVD compliant VOB.
+ *
+ ffmpeg -i input.avi -target pal-dvd out.vob
+ # 13.516s just transcode
+ ffmpeg -i input.avi -vhook /usr/local/bin/vhook/null.dll -target pal-dvd out.vob
+ # 23.546s transcode and img_convert
+ ffmpeg -i input.avi -vhook \
+ 'vhook/imlib2.dll -c red -F Vera/20 -x 150-0.5*N -y 70+0.25*N -t Hello_person' \
+ -target pal-dvd out.vob
+ # 21.454s transcode, img_convert and move text around
+ ffmpeg -i input.avi -vhook \
+ 'vhook/imlib2.dll -x 150-0.5*N -y 70+0.25*N -i /usr/share/imlib2/data/images/bulb.png' \
+ -target pal-dvd out.vob
+ # 20.828s transcode, img_convert and move image around
*
* This file is part of FFmpeg.
*
*/
#include "framehook.h"
+#include "swscale.h"
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <X11/Xlib.h>
#include <Imlib2.h>
+#include "eval.h"
+
+const char *const_names[]={
+ "PI",
+ "E",
+ "N", // frame number (starting at zero)
+ "H", // frame height
+ "W", // frame width
+ "h", // image height
+ "w", // image width
+ "X", // previous x
+ "Y", // previous y
+ NULL
+};
+
+static int sws_flags = SWS_BICUBIC;
typedef struct {
int dummy;
char *text;
char *file;
int r, g, b;
- int x;
- int y;
+ double x, y;
+ char *fileImage;
struct _CachedImage *cache;
+ Imlib_Image imageOverlaid;
+ AVEvalExpr *eval_x, *eval_y;
+ char *expr_x, *expr_y;
+ int frame_number;
+ int imageOverlaid_width, imageOverlaid_height;
+
+ // This vhook first converts frame to RGB ...
+ struct SwsContext *toRGB_convert_ctx;
+ // ... and then converts back frame from RGB to initial format
+ struct SwsContext *fromRGB_convert_ctx;
} ContextInfo;
typedef struct _CachedImage {
imlib_free_image();
av_free(ci->cache);
}
- if (ctx)
+ if (ctx) {
+ if (ci->imageOverlaid) {
+ imlib_context_set_image(ci->imageOverlaid);
+ imlib_free_image();
+ }
+ ff_eval_free(ci->expr_x);
+ ff_eval_free(ci->expr_y);
+ sws_freeContext(ci->toRGB_convert_ctx);
+ sws_freeContext(ci->fromRGB_convert_ctx);
av_free(ctx);
+ }
}
int Configure(void **ctxp, int argc, char *argv[])
char *fp = getenv("FONTPATH");
char *color = 0;
FILE *f;
+ char *p;
*ctxp = av_mallocz(sizeof(ContextInfo));
ci = (ContextInfo *) *ctxp;
+ ci->x = 0.0;
+ ci->y = 0.0;
+ ci->expr_x = "0.0";
+ ci->expr_y = "0.0";
+
optind = 0;
+ /* Use ':' to split FONTPATH */
if (fp)
+ while (p = strchr(fp, ':')) {
+ *p = 0;
+ imlib_add_path_to_font_path(fp);
+ fp = p + 1;
+ }
+ if ((fp) && (*fp))
imlib_add_path_to_font_path(fp);
- while ((c = getopt(argc, argv, "c:f:F:t:x:y:")) > 0) {
+
+ while ((c = getopt(argc, argv, "c:f:F:t:x:y:i:")) > 0) {
switch (c) {
case 'c':
color = optarg;
ci->file = av_strdup(optarg);
break;
case 'x':
- ci->x = atoi(optarg);
+ ci->expr_x = av_strdup(optarg);
break;
case 'y':
- ci->y = atoi(optarg);
+ ci->expr_y = av_strdup(optarg);
+ break;
+ case 'i':
+ ci->fileImage = av_strdup(optarg);
break;
case '?':
fprintf(stderr, "Unrecognized argument '%s'\n", argv[optind]);
}
}
+ if (ci->text || ci->file) {
ci->fn = imlib_load_font(font);
if (!ci->fn) {
fprintf(stderr, "Failed to load font '%s'\n", font);
}
imlib_context_set_font(ci->fn);
imlib_context_set_direction(IMLIB_TEXT_TO_RIGHT);
+ }
if (color) {
char buff[256];
}
}
imlib_context_set_color(ci->r, ci->g, ci->b, 255);
+
+ /* load the image (for example, credits for a movie) */
+ if (ci->fileImage) {
+ ci->imageOverlaid = imlib_load_image_immediately(ci->fileImage);
+ if (!(ci->imageOverlaid)){
+ av_log(NULL, AV_LOG_ERROR, "Couldn't load image '%s'\n", ci->fileImage);
+ return -1;
+ }
+ imlib_context_set_image(ci->imageOverlaid);
+ ci->imageOverlaid_width = imlib_image_get_width();
+ ci->imageOverlaid_height = imlib_image_get_height();
+ }
+
+ if (!(ci->eval_x = ff_parse(ci->expr_x, const_names, NULL, NULL, NULL, NULL, NULL))){
+ av_log(NULL, AV_LOG_ERROR, "Couldn't parse x expression '%s'\n", ci->expr_x);
+ return -1;
+ }
+
+ if (!(ci->eval_y = ff_parse(ci->expr_y, const_names, NULL, NULL, NULL, NULL, NULL))){
+ av_log(NULL, AV_LOG_ERROR, "Couldn't parse y expression '%s'\n", ci->expr_y);
+ return -1;
+ }
+
return 0;
}
data = imlib_image_get_data();
avpicture_fill(&picture1, (uint8_t *) data, PIX_FMT_RGBA32, width, height);
- if (pix_fmt != PIX_FMT_RGBA32) {
- if (img_convert(&picture1, PIX_FMT_RGBA32,
- picture, pix_fmt, width, height) < 0) {
- goto done;
- }
- } else {
- img_copy(&picture1, picture, PIX_FMT_RGBA32, width, height);
+
+ // if we already got a SWS context, let's realloc if is not re-useable
+ ci->toRGB_convert_ctx = sws_getCachedContext(ci->toRGB_convert_ctx,
+ width, height, pix_fmt,
+ width, height, PIX_FMT_RGBA32,
+ sws_flags, NULL, NULL, NULL);
+ if (ci->toRGB_convert_ctx == NULL) {
+ av_log(NULL, AV_LOG_ERROR,
+ "Cannot initialize the toRGB conversion context\n");
+ exit(1);
}
+// img_convert parameters are 2 first destination, then 4 source
+// sws_scale parameters are context, 4 first source, then 2 destination
+ sws_scale(ci->toRGB_convert_ctx,
+ picture->data, picture->linesize, 0, height,
+ picture1.data, picture1.linesize);
+
imlib_image_set_has_alpha(0);
{
char *tbp = ci->text;
time_t now = time(0);
char *p, *q;
- int x, y;
+ int y;
+
+ double const_values[]={
+ M_PI,
+ M_E,
+ ci->frame_number, // frame number (starting at zero)
+ height, // frame height
+ width, // frame width
+ ci->imageOverlaid_height, // image height
+ ci->imageOverlaid_width, // image width
+ ci->x, // previous x
+ ci->y, // previous y
+ 0
+ };
if (ci->file) {
int fd = open(ci->file, O_RDONLY);
}
}
- strftime(buff, sizeof(buff), tbp ? tbp : "[No data]", localtime(&now));
+ if (tbp)
+ strftime(buff, sizeof(buff), tbp, localtime(&now));
+ else if (!(ci->imageOverlaid))
+ strftime(buff, sizeof(buff), "[No data]", localtime(&now));
- x = ci->x;
+ ci->x = ff_parse_eval(ci->eval_x, const_values, ci);
+ ci->y = ff_parse_eval(ci->eval_y, const_values, ci);
y = ci->y;
+ if (!(ci->imageOverlaid))
for (p = buff; p; p = q) {
q = strchr(p, '\n');
if (q)
*q++ = 0;
- imlib_text_draw_with_return_metrics(x, y, p, &wid, &hig, &h_a, &v_a);
+ imlib_text_draw_with_return_metrics(ci->x, y, p, &wid, &hig, &h_a, &v_a);
y += v_a;
}
- }
- if (pix_fmt != PIX_FMT_RGBA32) {
- if (img_convert(picture, pix_fmt,
- &picture1, PIX_FMT_RGBA32, width, height) < 0) {
+ if (ci->imageOverlaid) {
+ imlib_context_set_image(image);
+ imlib_blend_image_onto_image(ci->imageOverlaid, 0,
+ 0, 0, ci->imageOverlaid_width, ci->imageOverlaid_height,
+ ci->x, ci->y, ci->imageOverlaid_width, ci->imageOverlaid_height);
}
- } else {
- img_copy(picture, &picture1, PIX_FMT_RGBA32, width, height);
+
+ }
+
+ ci->fromRGB_convert_ctx = sws_getCachedContext(ci->fromRGB_convert_ctx,
+ width, height, PIX_FMT_RGBA32,
+ width, height, pix_fmt,
+ sws_flags, NULL, NULL, NULL);
+ if (ci->fromRGB_convert_ctx == NULL) {
+ av_log(NULL, AV_LOG_ERROR,
+ "Cannot initialize the fromRGB conversion context\n");
+ exit(1);
}
+// img_convert parameters are 2 first destination, then 4 source
+// sws_scale parameters are context, 4 first source, then 2 destination
+ sws_scale(ci->fromRGB_convert_ctx,
+ picture1.data, picture1.linesize, 0, height,
+ picture->data, picture->linesize);
-done:
- ;
+ ci->frame_number++;
}
projects / ffmpeg / blobdiff