[gst-devel] Seeking failed with decoder plugin

[sudarshan bisht]

Hi Hung.
           Exactly ,  you are right , don't unref the filter instance  .

On Fri, Nov 28, 2008 at 8:30 AM, Wei-Di Hung <wdhung at vaplab.ee.ncu.edu.tw>wrote:

> This is what I'm using:
>    Gstmp4dec * filter = GST_MP4DEC(GST_PAD_PARENT(pad));
>
> So it doen't have to unref the filter
> while creating the filter instance this way?
>
> Actually I'm not clear with gobject references
> and I'll try to find it out.
>
> On Thu, 27 Nov 2008 16:24:06 +0530, sudarshan bisht wrote
>  > Hi ,
> > Can u tell me how you are creating filter instance in src_event function
> .
> >
> > On Thu, Nov 27, 2008 at 3:29 PM, Wei-Di Hung <
> wdhung at vaplab.ee.ncu.edu.tw>
> wrote:
> >
> > Yes, I use ffdemux_avi here.
> >
> > > Hi ,,
> > > Are you using demuxer also in pipeline ?
> > >
> > > On Thu, Nov 27, 2008 at 3:01 PM, Wei-Di Hung
> <wdhung at vaplab.ee.ncu.edu.tw> wrote:
> > > Hi,
> > > I'm writing a plugin for HW video decoder,
> > > functions of playing, pause and stop have been verified.
> > >
> > > While seeking, the pipeline ran until the frame of seeking time
> > > was decoded, i.e, it did jump to the target frame, but the test
> > > program crashed then.
> > >
> > > Here are messages shown after the sink pad received
> GST_EVENT_NEW_SEGMENT:
> > > (player:886): GStreamer-CRITICAL **:
> > > Trying to dispose element decoder, but it is not in the NULL state.
> > > You need to explicitly set elements to the NULL state before
> > > dropping the final reference, to allow them to clean up.
> > >
> > > (player:886): GLib-GObject-CRITICAL **: g_object_ref: assertion
> `G_IS_OBJECT
> > > (object)' failed
> > >
> > > After these message, it seemed the HW keep decoding from the paused
> frame
> to
> > > the target frame. but the intermediate frames were not displayed.
> > >
> > > Before decoding of each frame, came up the folloing message:
> > > (player:886): GLib-GObject-WARNING **: invalid unclassed pointer in
> cast
> to
> > > `Gstvideodec'
> > >
> > > These are part of codes in sink event handler,
> > > the format is GST_FORMAT_TIME in this case,
> > >
> > > case GST_EVENT_NEWSEGMENT:
> > > {
> > > GstFormat format;
> > > gint64 start, stop, position;
> > > gdouble rate;
> > >
> > > gst_event_parse_new_segment(event, NULL, &rate, &format,
> > > &start, &stop, &position);
> > >
> > > if (GST_FORMAT_TIME == format) {
> > > result = gst_pad_push_event(filter->srcpad, event);
> > > } else {
> > > ... ...
> > > }
> > > break;
> > > }
> > >
> > > Below are part of codes in source event handler:
> > >
> > > switch (GST_EVENT_TYPE(event)) {
> > > case GST_EVENT_SEEK:
> > > res = gst_pad_push_event(filter->sinkpad, event);
> > > break;
> > > case GST_EVENT_NAVIGATION:
> > > default:
> > > res = gst_pad_push_event(filter->sinkpad, event);
> > > break;
> > > }
> > >
> > > gst_object_unref(filter);
> > > return res;
> > >
> > > Could someone help me finding possible root cause?
> > > Thanks in advance.
> > >
> > >
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> > >
> > > --
> > > Regards,
> > >
> > > Sudarshan Bisht
> >
> >
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> >
> >
> > --
> > Regards,
> >
> > Sudarshan Bisht
>
>
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-- 
Regards,

Sudarshan Bisht
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