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

[GStreamer (GNOME Bugzilla)]

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

Mathieu Duponchelle <mduponchelle1 at gmail.com> changed:

           What    |Removed                     |Added
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 Attachment #373995|none                        |needs-work
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--- Comment #35 from Mathieu Duponchelle <mduponchelle1 at gmail.com> ---
Review of attachment 373995:
 --> (https://bugzilla.gnome.org/review?bug=754575&attachment=373995)

As far as I understand, these patches will not lead to a compliant behaviour
with respect to the Scale header, and I don't think the seeking mechanism in
GStreamer will let us express a combination of ABS(Scale) != 1.0 and Speed !=
1.0 appropriately. ABS(Scale) != 1.0 is expected to lead to the same data rate
as ABS(scale) == 1.0 , which roughly translates to seeking with the TRICK_MODE
flag and rate == Scale .

This means we cannot simply use a rate == Scale * Speed , and have to either
extend the seeking mechanism, or more pragmatically enforce the constraint that
when Speed != 1.0 , the only valid values for Scale are -1.0 or 1.0 .

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