[Bug 754575] trick modes in gst-rtsp-server

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=754575

--- Comment #30 from Nikita Bobkov <NikitaDBobkov at gmail.com> ---
(In reply to Sebastian Dröge (slomo) from comment #28)
> Review of attachment 341496 [details] [review]:
> 
> Looks good, but please provide a clearer commit message.
> 
> Also it doesn't confuse clients if we now send things gop-by-gop backwards,
> and each gop forwards?

The only RTSP client I found to be able to initiate reverse playback is VLC. As
I said it does not really like this kind of stream:

(In reply to Nikita Bobkov from comment #20)
> Created attachment 341487 [details] [review]
> Reverse playback support
> 
> With this patch VLC can even play formats without predicted frames (like
> MJPEG) in reverse from our server. For other formats (like H264) it shows
> only key frames. RTSP server sends frames of GOP in forward order which
> seems to be conforming to ONVIF streaming specification. Does anyone know
> RTSP/ONVIF client which can play such streams?

But I am not sure that VLC is good reference here considering how it splits
PLAY request into two parts: one with Range header and other with Scale.

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