[FFmpeg-devel] [PATCH] avcodec/ccaption_dec: don't print multiple \pos tags per cue

[Michael Niedermayer]

On Sun, Mar 10, 2024 at 07:40:47PM -0500, Marth64 wrote:
> 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 <marth64 at proxyid.net>
> ---
>  libavcodec/ccaption_dec.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)

This breaks fate

--- ./tests/ref/fate/sub-cc-scte20	2024-03-05 02:37:36.223299993 +0100
+++ tests/data/fate/sub-cc-scte20	2024-03-11 22:13:08.091910294 +0100
@@ -13,5 +13,5 @@
 [Events]
 Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
 Dialogue: 0,0:00:00.00,0:00:01.44,Default,,0,0,0,,{\an7}{\pos(48,182)}BESIDES THE
-Dialogue: 0,0:00:01.43,0:00:03.93,Default,,0,0,0,,{\an7}{\pos(38,166)}\hBESIDES THE \N{\an7}{\pos(38,197)}SPENDING AND THIS, IS THAT CAR
-Dialogue: 0,0:00:03.94,0:00:06.31,Default,,0,0,0,,{\an7}{\pos(38,182)}SPENDING AND THIS, IS THAT CAR \N{\an7}{\pos(38,197)}MANUFACTURERS ARE ABOUT AS
+Dialogue: 0,0:00:01.43,0:00:03.93,Default,,0,0,0,,{\an7}{\pos(38,166)}\hBESIDES THE \NSPENDING AND THIS, IS THAT CAR
+Dialogue: 0,0:00:03.94,0:00:06.31,Default,,0,0,0,,{\an7}{\pos(38,182)}SPENDING AND THIS, IS THAT CAR \NMANUFACTURERS ARE ABOUT AS
Test sub-cc-scte20 failed. Look at tests/data/fate/sub-cc-scte20.err for details.

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Nations do behave wisely once they have exhausted all other alternatives. 
-- Abba Eban
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