gst_element_query_position always returning zero

[Tim-Philipp Müller]

On Mon, 2013-02-18 at 23:28 +0530, satish pattar wrote:

Hi,

> Thanks a lot Tim for your response.
> I enabled the log , from the log it appears that typefinding is done
> successfully & also pipeline status is set to playing.
> querying duration is failed when the pipeline state is PAUSED but
> again again when it is in playing state it always returns zero & no
> audio.
> 
> 
> I am attaching the logs for reference. what is going wrong here.

The log contains multiple criticals, such as:

(<unknown>:21725): GStreamer-CRITICAL **: gst_pad_set_caps: assertion
`caps == NULL || gst_caps_is_fixed (caps)' failed

These are bugs in some plugin and should be fixed.

It looks like the mp3 decoder plugin is a bit broken. For one, it sends
a newsegment event in BYTE format to the sink, and I think things go
wrong from there. There are a lot of 'dropping sample out of segment
time 0:00:00.013061224, start 0:00:00.000000000' messages and the like,
that can't be good.

Perhaps try with an mp3 decoder that's not broken, or use an
mp3parse/mpegaudioparse in front of the mp3 decoder.

 Cheers
  -Tim

> 
> Thank you.
> SPattar
> 
> On Fri, Feb 15, 2013 at 6:28 PM, Tim-Philipp Müller <t.i.m at zen.co.uk>
> wrote:
>         On Fri, 2013-02-15 at 18:17 +0530, satish pattar wrote:
>         
>         > Additional information:
>         > I used filesrc instead of my source plugin,
>         gst_element_query_position
>         > is working as expected, but with the plugin what
>         > I have is always returning zero when pipeline state is set
>         to PLAYING.
>         > Also the source plugin is working in push mode.
>         >
>         > I am not sure if the problem lies in the source plugin or in
>         player
>         > application.
>         >
>         > Your inputs are appreciated.
>         
>         
>         It's not really clear anyone will be able to provide much help
>         here.
>         
>         Are you checking the pipeline bus for messages? Are there any
>         error
>         messages? Does the state change for the pipeline to PAUSED
>         complete?
>         
>         Maybe check the GST_DEBUG log to see what's going on. Start
>         with
>         
>          GST_DEBUG=*typefind*:5,*decode*:5
>         
>         to see if typefinding happens, if a media type is found, and
>         if
>         decodebin tries to plug parsers/demuxers/decoders.
>         
>         Cheers
>          -Tim
>         
>         _______________________________________________
>         gstreamer-devel mailing list
>         gstreamer-devel at lists.freedesktop.org
>         http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
> 
> 
> 
> 
> -- 
> Thanks & Regards,
> 
> Satish Pattar
> 
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel