Hello,
I'm relatively new to development with libav but has already managed to
create an iOS-based video player for DVB-S (MPEGTS) streams that are
delivered by a set-top box via RTSP. After few modifications to libav,
it is now able to download and play the stream directly from the box.
Now I have to implement time-shifting so I intend to use a local file to
store the stream as a circular buffer of fixed size. Please note that
the box's RTSP server only supports PLAY, not pause or anything useful.
My problem is that I cannot figure out how to dump the MPEG-TS stream
unmodified to a local file. I'm not really sure at what point should I
store the current packet's pkt->data to a file in such a way that at the
end the file will be perfectly played as an mpegts movie. I'm not sure
even if pkt->data holds enough information to reconstruct the mpegts
movie sequentially as the packets are being read.
In the process I don't need to transcode anything, just need to store a
table of timestamps/byte positions for the time-shifting to work.
I'd appreciate if someone could share some ideas.
Thank you!
Julian Herrera
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