Fix #7637
One empty/end sample is created and inserted between two caption lines when
there is a gap.
This patch is to split the sample into multiple ones when its duration is too
long (>= INT_MAX)
Signed-off-by: Jun Li <junli1...@gmail.com>
---
libavformat/movenc.c | 26 ++++++++++++++-----
tests/fate/subtitles.mak | 6 +++++
tests/ref/fate/binsub-movtextenc-long-dur | 1 +
.../fate/binsub-movtextenc-long-dur-timebase | 1 +
4 files changed, 28 insertions(+), 6 deletions(-)
create mode 100644 tests/ref/fate/binsub-movtextenc-long-dur
create mode 100644 tests/ref/fate/binsub-movtextenc-long-dur-timebase
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 715bec1c2f..5dc2a19c3c 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -5750,7 +5750,8 @@ static int mov_write_packet(AVFormatContext *s, AVPacket
*pkt)
*
* 2) For each subtitle track, check if the current packet's
* dts is past the duration of the last subtitle sample. If
- * so, we now need to write an end sample for that subtitle.
+ * so, we now need to write one or multiple end samples for
+ * that subtitle.
*
* This must be done conditionally to allow for subtitles that
* immediately replace each other, in which case an end sample
@@ -5764,11 +5765,24 @@ static int mov_write_packet(AVFormatContext *s,
AVPacket *pkt)
int ret;
if (trk->par->codec_id == AV_CODEC_ID_MOV_TEXT &&
- trk->track_duration < pkt->dts &&
- (trk->entry == 0 || !trk->last_sample_is_subtitle_end)) {
- ret = mov_write_subtitle_end_packet(s, i, trk->track_duration);
- if (ret < 0) return ret;
- trk->last_sample_is_subtitle_end = 1;
+ trk->track_duration < pkt->dts) {
+ int max_duration = INT_MAX - 1;
+ if (trk->entry == 0 || !trk->last_sample_is_subtitle_end) {
+ ret = mov_write_subtitle_end_packet(s, i,
trk->track_duration);
+ if (ret < 0)
+ return ret;
+ trk->last_sample_is_subtitle_end = 1;
+ }
+ if (trk->last_sample_is_subtitle_end &&
+ pkt->dts - trk->track_duration > max_duration) {
+ int64_t dts = trk->track_duration;
+ while(pkt->dts - dts > max_duration) {
+ dts += max_duration;
+ ret = mov_write_subtitle_end_packet(s, i, dts);
+ if (ret < 0)
+ return ret;
+ }
+ }
}
}
diff --git a/tests/fate/subtitles.mak b/tests/fate/subtitles.mak
index 0042902161..4c2b34c431 100644
--- a/tests/fate/subtitles.mak
+++ b/tests/fate/subtitles.mak
@@ -34,6 +34,12 @@ fate-sub-movtext: CMD = fmtstdout ass -i
$(TARGET_SAMPLES)/sub/MovText_capabilit
FATE_SUBTITLES-$(call ENCDEC, MOVTEXT, MOV) += fate-binsub-movtextenc
fate-binsub-movtextenc: CMD = md5 -i
$(TARGET_SAMPLES)/sub/MovText_capability_tester.mp4 -map 0 -scodec mov_text -f
mp4 -flags +bitexact -fflags +bitexact -movflags frag_keyframe+empty_moov
+FATE_SUBTITLES-$(call ENCDEC, MOVTEXT, MOV) += fate-binsub-movtextenc-long-dur
+fate-binsub-movtextenc-long-dur: CMD = md5 -i
$(TARGET_SAMPLES)/sub/WebVTT_movtext_long_dur.vtt -map 0 -scodec mov_text -f
mp4 -flags +bitexact -fflags +bitexact -movflags frag_keyframe+empty_moov
+
+FATE_SUBTITLES-$(call ENCDEC, MOVTEXT, MOV) +=
fate-binsub-movtextenc-long-dur-timebase
+fate-binsub-movtextenc-long-dur-timebase: CMD = md5 -i
$(TARGET_SAMPLES)/sub/WebVTT_movtext_long_dur.vtt -map 0 -scodec mov_text
-time_base 1000 -f mp4 -flags +bitexact -fflags +bitexact -movflags
frag_keyframe+empty_moov
+
FATE_SUBTITLES_ASS-$(call DEMDEC, MPL2, MPL2) += fate-sub-mpl2
fate-sub-mpl2: CMD = fmtstdout ass -i
$(TARGET_SAMPLES)/sub/MPL2_capability_tester.txt
diff --git a/tests/ref/fate/binsub-movtextenc-long-dur
b/tests/ref/fate/binsub-movtextenc-long-dur
new file mode 100644
index 0000000000..eb8a3f8fc7
--- /dev/null
+++ b/tests/ref/fate/binsub-movtextenc-long-dur
@@ -0,0 +1 @@
+7f78c11bb4a6b16335540ef31ba10219
diff --git a/tests/ref/fate/binsub-movtextenc-long-dur-timebase
b/tests/ref/fate/binsub-movtextenc-long-dur-timebase
new file mode 100644
index 0000000000..185dcc0aab
--- /dev/null
+++ b/tests/ref/fate/binsub-movtextenc-long-dur-timebase
@@ -0,0 +1 @@
+349d78698cc1226d33d4e6699dbf46d9
--
2.17.1
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
To unsubscribe, visit link above, or email
ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
