Wu Zhiqiang (2017-12-30): > The command to generate sample video: > > ffmpeg -f lavfi -i testsrc=duration=120 -c:v h264 -profile:v high -level:v > 10 -pix_fmt yuv420p -r 30 -g 30 -c:a aac test.flv > echo -e "file test.flv\nduration 120" > playlist > ffplay -f concat playlist -ss 90 -max_ts_probe 0 > > then seek to time before 30s , the result timestamp is huge and > print:"Invalid timestamps stream"
Thanks. I think I understand the problem: it is not that the timestamps are not unwrapped, it is that they are unwrapped twice, because for some reason lavf defaults to parameters tuned for MPEG. See the attached patch. Regards, -- Nicolas George
From 9f24fe25cddabc0b0dc1a60d1789ea7feaa125f7 Mon Sep 17 00:00:00 2001
From: Nicolas George <geo...@nsup.org>
Date: Sat, 30 Dec 2017 12:17:08 +0100
Subject: [PATCH] lavf/concatdec: properly init streams timestamp parameters.
pts_wrap_bits defaults to 33 (like MPEG), that causes valid
timestamps to be unwrapped and become invalid.
Inspired by a patch by Wu Zhiqiang <mymoey...@gmail.com>.
Signed-off-by: Nicolas George <geo...@nsup.org>
---
libavformat/concatdec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavformat/concatdec.c b/libavformat/concatdec.c
index 0e189012ad..bd5174ada2 100644
--- a/libavformat/concatdec.c
+++ b/libavformat/concatdec.c
@@ -185,8 +185,8 @@ static int copy_stream_props(AVStream *st, AVStream *source_st)
return ret;
st->r_frame_rate = source_st->r_frame_rate;
st->avg_frame_rate = source_st->avg_frame_rate;
- st->time_base = source_st->time_base;
st->sample_aspect_ratio = source_st->sample_aspect_ratio;
+ avpriv_set_pts_info(st, 64, source_st->time_base.num, source_st->time_base.den);
av_dict_copy(&st->metadata, source_st->metadata, 0);
return 0;
--
2.15.1
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