[gst-devel] Seeking failed with decoder plugin

[sudarshan bisht]

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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