[FFmpeg-devel] [PATCH v2, 2/2] avformat/hls: fix start time seek error

[mymoeyard at gmail.com]

From: Wu Zhiqiang <mymoeyard at gmail.com>

Calculate first_timestamp based on first packet timestamp.
Some m3u8 have streams that second one has smaller timestamp
in first packet of this stream.
Start/seek from start time may fail due to EIO error.
It should be based on start_time of AvFormatContext.

Signed-off-by: Wu Zhiqiang <mymoeyard at gmail.com>
---
 libavformat/hls.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/libavformat/hls.c b/libavformat/hls.c
index 069e7b06e9..125f68ca4e 100644
--- a/libavformat/hls.c
+++ b/libavformat/hls.c
@@ -2110,10 +2110,8 @@ static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
                         pkt_ts = AV_NOPTS_VALUE;
 
 
-                    if (c->first_timestamp == AV_NOPTS_VALUE &&
-                        pkt_ts       != AV_NOPTS_VALUE)
-                        c->first_timestamp = av_rescale_q(pkt_ts,
-                            get_timebase(pls), AV_TIME_BASE_Q);
+                    c->first_timestamp = s->start_time != AV_NOPTS_VALUE ? s->start_time : 0;
+
                 }
 
                 if (pls->seek_timestamp == AV_NOPTS_VALUE)
-- 
2.15.0