[Live-devel] Re: [vlc-devel] RTSP trickplay support

[Matthew Romaine]

Hi Ross,

In RTSPClient::createScaleString(float scale), you check to see if 
scale == 1.0, and as it's the default value, don't put  "Scale: " in 
the header.  However, this seems to prevent a player from returning to 
normal speed after having used a different scale value than 1.0.  Since 
there doesn't seem to be a way to send incremental changes to scale, 
either removing the default check (and hence always send a Scale: in 
the header), or maintain an internal state are two resolutions I can 
come up with.

Could you check into this?

Thanks,
Matt

On 2004/12/15, at 14:43, Ross Finlayson wrote:

>
>> Changing the scale by calling ::playMedia[Sub]Session() seems to work 
>> but subsequent calls to confirm the change via 
>> Media[Sub]Session::scale() continue to return 1.0; I poked around and 
>> can't find where it's being updated.  I'm doing it through the VLC 
>> livedotcom.cpp wrapper, and I've confirmed the "OK" response, and 
>> from what I can tell the packets are being sent as expected.  Where 
>> is fScale being reset by the respective 
>> *AudioFileServerMedia[Sub]Session?
>
> Matt,
>
> This is done in "RTSPClient::parseScaleHeader()" (in 
> "liveMedia/RTSPClient.cpp").  I.e., the RTSP client code sets the 
> field based upon the "Scale:" header that the server sends back in the 
> "PLAY" response.  (This is not necessarily the same as the value that 
> the client specified in the "Scale:" header in the "PLAY" *request*.)
>
>
> 	Ross Finlayson
> 	LIVE.COM
> 	<http://www.live.com/>
>
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