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sd_ass, sd_lavc: use the input video's pixel aspect for scaling subtitles. 

The previous code used the output video's pixel aspect for stretching
purposes, breaking rendering with e.g. -vf scale in the chain. Now
subtitles are stretched using the input video's pixel aspect only,
matching the intentions of the original subtitle author.
This commit is contained in:
Rudolf Polzer 2013-11-01 13:15:59 +01:00 committed by Rudolf Polzer
parent dbb7927a1e
commit 49caa0a775
2 changed files with 25 additions and 4 deletions
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5
sub/sd_ass.c
View File

@ -142,7 +142,10 @@ static void get_bitmaps(struct sd *sd, struct mp_osd_res dim, double pts,
if (!ctx->is_converted && (!opts->ass_style_override ||
opts->ass_vsfilter_aspect_compat))
{
scale = scale * dim.video_par;
// Let's use the original video PAR for vsfilter compatibility:
scale = scale
* (ctx->video_params.d_w / (double)ctx->video_params.d_h)
/ (ctx->video_params.w / (double)ctx->video_params.h);
}
mp_ass_configure(renderer, opts, &dim);
ass_set_aspect_ratio(renderer, scale, 1);

24
sub/sd_lavc.c
View File

@ -26,6 +26,7 @@
#include "mpvcore/av_common.h"
#include "mpvcore/options.h"
#include "demux/stheader.h"
#include "video/mp_image.h"
#include "sd.h"
#include "dec_sub.h"
#include "sub.h"
@ -41,6 +42,7 @@ struct sd_lavc_priv {
bool bitmaps_changed;
double pts;
double endpts;
struct mp_image_params video_params;
};
static bool supports_format(const char *format)
@ -223,10 +225,13 @@ static void get_bitmaps(struct sd *sd, struct mp_osd_res d, double pts,
double yscale = (double)vidh / inh;
if (priv->avctx->codec_id == AV_CODEC_ID_DVD_SUBTITLE) {
// For DVD subs, try to keep the subtitle PAR at display PAR.
if (d.video_par > 1.0) {
xscale /= d.video_par;
double video_par =
(priv->video_params.d_w / (double)priv->video_params.d_h)
/ (priv->video_params.w / (double)priv->video_params.h);
if (video_par > 1.0) {
xscale /= video_par;
} else {
yscale *= d.video_par;
yscale *= video_par;
}
}
int cx = vidw / 2 - (int)(inw * xscale) / 2;
@ -268,12 +273,25 @@ static void uninit(struct sd *sd)
talloc_free(priv);
}
static int control(struct sd *sd, enum sd_ctrl cmd, void *arg)
{
struct sd_lavc_priv *priv = sd->priv;
switch (cmd) {
case SD_CTRL_SET_VIDEO_PARAMS:
priv->video_params = *(struct mp_image_params *)arg;
return CONTROL_OK;
default:
return CONTROL_UNKNOWN;
}
}
const struct sd_functions sd_lavc = {
.name = "lavc",
.supports_format = supports_format,
.init = init,
.decode = decode,
.get_bitmaps = get_bitmaps,
.control = control,
.reset = reset,
.uninit = uninit,
};