As I recall, ffserver does not support the HTTP streaming protocol, so you are processing the video as. I know that the live555 server can be configured to stream http.
converting to a live http broadcast is the only possible reason why I think you want to restart again.
there are frameworks that can be used to play rtsp direct channels.
Dropcam is one and is based on live 555, we have one here based on ffmpeg
https://github.com/mooncatventures-group
none of them have a scrub back x seconds, but you can easily extract the extracted frames, put them in a ring buffer and play from the buffer
take a look at the ffplayer tests that record video (not yet audio) in the new h264 mov and save it in a photo album
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