Re: [xine-devel] how to determine stream length & current time?

[Heiko S. <hsc...@ft...>]

Hi Guenter, Hi list,

> > > That works fine after you have the cached index for your file, but
> > > what about disc based media? Well, you could try to build an index of
> > > I-frames for a DVD, but it will take quite some time...
> >
> >   For DVDs you can make somewhat accurate estimates and seeks based on
> > the information in the IFO/NAV data.
>
> oki, I'll implement the bitrate-estimation based aproach :>
>
> in fact, I'm planning to leave the implementation details to whomever
> implements a demuxer - so the demuxers will have a new function pointer

that sounds like a great solution to me.

>   /*
>    * estimate stream length in seconds
>    * may return 0 for non-seekable streams
>    */
>
>   int (*get_stream_length) (demux_plugin_t *this);

wouldn't it be best to calculate in frames instead of secods ?! just to be
safe.

> buf_element_t has a new field
>
>   int                   input_time;/* time offset in seconds from
> beginning of stream       */

dito... why seconds when in some cases frames are possible ?
in the cases when it's not possible there is no loss, but for example
motion-jpeg in avi streams could be handled very precisely...

Heiko