[Libav-user] About av_seek_frame flag

[YIRAN LI]

Hi

I'm using av_seek_frame with AVSEEK_FLAG_BACKWARD flag and I'd like to
know, if I specified a position beyond the duration (I use
avstream.duration to init the time line), will av_seek_frame with
AVSEEK_FLAG_BACKWARD guarantee to seek to a position from where I can read
at least one frame.

In fact I'm considering this case:


 |..............................................................................
|
     last frame pts
 avstream.duration

as I said, my player's timeline is initialized with avstream.duration as
max pos, if I
call av_seek_frame(  lastframe <pos < end, flag_back), where will the read
position
be set to? is it guaranteed to be before last frame so that I can read at
least frame?

Thanks
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