[FFmpeg-devel] [PATCH 6/6] avformat/av1dec: Disallow seeking by bytes

[Andreas Rheinhardt]

The low overhead OBU format provides no means to resync after performing
a byte-based seek; in other words: Byte based seeking is just not
supported.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>
---
The reason I didn't disallow this earlier was that there is one scenario
where such a seek would work: When one  already knows the correct
position for the start of a frame. But otherwise it just doesn't work.

Somehow ffplay tries byte based seeking even for formats with the
AVFMT_NO_BYTE_SEEK flag set. Line 2837 should probably be changed to no
longer do that.

 libavformat/av1dec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/av1dec.c b/libavformat/av1dec.c
index 88a3c325e4..37f21483b9 100644
--- a/libavformat/av1dec.c
+++ b/libavformat/av1dec.c
@@ -428,7 +428,7 @@ const AVInputFormat ff_obu_demuxer = {
     .read_packet    = obu_read_packet,
     .read_close     = av1_read_close,
     .extensions     = "obu",
-    .flags          = AVFMT_GENERIC_INDEX,
+    .flags          = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK,
     .priv_class     = &av1_demuxer_class,
 };
 #endif
-- 
2.30.2