[FFmpeg-devel] [PATCH 1/2] avformat/rtsp: set AVFMTCTX_UNSEEKABLE flag

[Kaarle Ritvanen]

for live RTP streams. Some external applications, such as Qt Multimedia,
depend on this flag being set correctly.

Signed-off-by: Kaarle Ritvanen <kaarle.ritvanen at datakunkku.fi>
---
 libavformat/rtsp.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index 5ea471b40c..e7c00c69fa 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -629,8 +629,8 @@ static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
             rtsp_parse_range_npt(p, &start, &end);
             s->start_time = start;
             /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
-            s->duration   = (end == AV_NOPTS_VALUE) ?
-                            AV_NOPTS_VALUE : end - start;
+            if (end != AV_NOPTS_VALUE)
+                s->duration = end - start;
         } else if (av_strstart(p, "lang:", &p)) {
             if (s->nb_streams > 0) {
                 get_word(buf1, sizeof(buf1), &p);
@@ -720,6 +720,8 @@ int ff_sdp_parse(AVFormatContext *s, const char *content)
     char buf[SDP_MAX_SIZE], *q;
     SDPParseState sdp_parse_state = { { 0 } }, *s1 = &sdp_parse_state;
 
+    s->duration = AV_NOPTS_VALUE;
+
     p = content;
     for (;;) {
         p += strspn(p, SPACE_CHARS);
@@ -753,6 +755,9 @@ int ff_sdp_parse(AVFormatContext *s, const char *content)
         av_freep(&s1->default_exclude_source_addrs[i]);
     av_freep(&s1->default_exclude_source_addrs);
 
+    if (s->duration == AV_NOPTS_VALUE)
+        s->ctx_flags |= AVFMTCTX_UNSEEKABLE;
+
     return 0;
 }
 #endif /* CONFIG_RTPDEC */
-- 
2.49.0