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Bitrate of a media file

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Carlo 1-9-8-7 xxx

Bitrate of a media file

Hi everybody!
I have to calculate the bitrate of a video/audio file, not by reading metatag.
My idea is to see how many bytes have been read by gstreamer in a due amount of time (for example Δt=100ms)... in this way I can calculate "istantaneous" bitrate as Δbytes/Δt
Well, the question is, gstreamer has got the query_position for the position in seconds, is there any function that returns the position in bytes?

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Sandeep Prakash

Re: Bitrate of a media file

Hi,

Carlo 1-9-8-7 xxx wrote

Well, the question is, gstreamer has got the query_position for the position in seconds, is there any function that returns the position in bytes?

You can try "gst_element_query_position" with the second argument as GST_FORMAT_BYTES.

Regards,
Sandeep Prakash
http://sandeepprakash.homeip.net

Carlo 1-9-8-7 xxx

Re: Bitrate of a media file

> Date: Tue, 27 Jul 2010 06:36:27 -0700
> From: [hidden email]
> To: [hidden email]
> Subject: Re: [gst-devel] Bitrate of a media file
>
>
> Hi,
>
>
> Carlo 1-9-8-7 xxx wrote:
> >
> > Well, the question is, gstreamer has got the query_position for the
> > position in seconds, is there any function that returns the position in
> > bytes?
> >
> You can try "gst_element_query_position" with the second argument as
> GST_FORMAT_BYTES.
>

Thanks for the answer,
that's what I thought, but gst_element_query_position with GST_FORMAT_BYTES returns incorrect values. In particular I think that these values are in some way related with the duration in seconds... in fact, for example, for 2 different files (with different bitrates) if I call "gst_element_query_position" with GST_FORMAT_BYTES at the same time (eg. after 10 seconds from the start of playing), I get the same values for both the files... any other ideas? :)

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Sudarshan Bisht

Re: Bitrate of a media file

Hi ,

You can give a try to gst_element_query_convert() .

On Wed, Jul 28, 2010 at 11:03 AM, Carlo 1-9-8-7 . <[hidden email]> wrote:

> Date: Tue, 27 Jul 2010 06:36:27 -0700
> From: [hidden email]
> To: [hidden email]
> Subject: Re: [gst-devel] Bitrate of a media file

>
>
> Hi,
>
>
> Carlo 1-9-8-7 xxx wrote:
> >
> > Well, the question is, gstreamer has got the query_position for the
> > position in seconds, is there any function that returns the position in
> > bytes?
> >
> You can try "gst_element_query_position" with the second argument as
> GST_FORMAT_BYTES.
>

Thanks for the answer,
that's what I thought, but gst_element_query_position with GST_FORMAT_BYTES returns incorrect values. In particular I think that these values are in some way related with the duration in seconds... in fact, for example, for 2 different files (with different bitrates) if I call "gst_element_query_position" with GST_FORMAT_BYTES at the same time (eg. after 10 seconds from the start of playing), I get the same values for both the files... any other ideas? :)

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Sudarshan Bisht

Re: Bitrate of a media file

One question I have , on which element you fire gst_element_query_position with GST_FORMAT_BYTES option?

On Wed, Jul 28, 2010 at 11:53 AM, sudarshan bisht <[hidden email]> wrote:

Hi ,

You can give a try to gst_element_query_convert() .

On Wed, Jul 28, 2010 at 11:03 AM, Carlo 1-9-8-7 . <[hidden email]> wrote:

> Date: Tue, 27 Jul 2010 06:36:27 -0700
> From: [hidden email]
> To: [hidden email]
> Subject: Re: [gst-devel] Bitrate of a media file

>
>
> Hi,
>
>
> Carlo 1-9-8-7 xxx wrote:
> >
> > Well, the question is, gstreamer has got the query_position for the
> > position in seconds, is there any function that returns the position in
> > bytes?
> >
> You can try "gst_element_query_position" with the second argument as
> GST_FORMAT_BYTES.
>

Thanks for the answer,
that's what I thought, but gst_element_query_position with GST_FORMAT_BYTES returns incorrect values. In particular I think that these values are in some way related with the duration in seconds... in fact, for example, for 2 different files (with different bitrates) if I call "gst_element_query_position" with GST_FORMAT_BYTES at the same time (eg. after 10 seconds from the start of playing), I get the same values for both the files... any other ideas? :)

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--
Regards,

Sudarshan Bisht

Carlo 1-9-8-7 xxx

Re: Bitrate of a media file

On GstElement *pipeline. The values with GST_FORMAT_TIME are correct.... I'll try to take a look at gst_element_query_convert()

Date: Wed, 28 Jul 2010 12:00:54 +0300
From: [hidden email]
To: [hidden email]
Subject: Re: [gst-devel] Bitrate of a media file

One question I have , on which element you fire gst_element_query_position with GST_FORMAT_BYTES option?

On Wed, Jul 28, 2010 at 11:53 AM, sudarshan bisht <[hidden email]> wrote:

Hi ,

You can give a try to gst_element_query_convert() .

On Wed, Jul 28, 2010 at 11:03 AM, Carlo 1-9-8-7 . <[hidden email]> wrote:

> Date: Tue, 27 Jul 2010 06:36:27 -0700
> From: [hidden email]
> To: [hidden email]
> Subject: Re: [gst-devel] Bitrate of a media file

>
>
> Hi,
>
>
> Carlo 1-9-8-7 xxx wrote:
> >
> > Well, the question is, gstreamer has got the query_position for the
> > position in seconds, is there any function that returns the position in
> > bytes?
> >
> You can try "gst_element_query_position" with the second argument as
> GST_FORMAT_BYTES.
>

Thanks for the answer,
that's what I thought, but gst_element_query_position with GST_FORMAT_BYTES returns incorrect values. In particular I think that these values are in some way related with the duration in seconds... in fact, for example, for 2 different files (with different bitrates) if I call "gst_element_query_position" with GST_FORMAT_BYTES at the same time (eg. after 10 seconds from the start of playing), I get the same values for both the files... any other ideas? :)

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--
Regards,

Sudarshan Bisht

--
Regards,

Sudarshan Bisht

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