Currently, Closed Captions decoder prints multiple \pos ASS tags per line,
per cue. This is invalid behavior, because only the first \pos tag in a cue
is honored by ASS anyway. Don't write multiple \pos tags.
Signed-off-by: Marth64 <mart...@proxyid.net>
---
libavcodec/ccaption_dec.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/libavcodec/ccaption_dec.c b/libavcodec/ccaption_dec.c
index faf058ce97..9d4a93647c 100644
--- a/libavcodec/ccaption_dec.c
+++ b/libavcodec/ccaption_dec.c
@@ -456,7 +456,7 @@ static void roll_up(CCaptionSubContext *ctx)
static int capture_screen(CCaptionSubContext *ctx)
{
- int i, j, tab = 0;
+ int i, j, tab = 0, seen_row = 0;
struct Screen *screen = ctx->screen + ctx->active_screen;
enum cc_font prev_font = CCFONT_REGULAR;
enum cc_color_code prev_color = CCCOL_WHITE;
@@ -496,7 +496,11 @@ static int capture_screen(CCaptionSubContext *ctx)
x = ASS_DEFAULT_PLAYRESX * (0.1 + 0.0250 * j);
y = ASS_DEFAULT_PLAYRESY * (0.1 + 0.0533 * i);
- av_bprintf(&ctx->buffer[bidx], "{\\an7}{\\pos(%d,%d)}", x, y);
+
+ if (!seen_row) {
+ av_bprintf(&ctx->buffer[bidx], "{\\an7}{\\pos(%d,%d)}", x, y);
+ seen_row = 1;
+ }
for (; j < SCREEN_COLUMNS; j++) {
const char *e_tag = "", *s_tag = "", *c_tag = "", *b_tag = "";
--
2.34.1
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