[Speex-dev] Playing captured speex frames

[Jozsef Vass]

Speexdec plays ogg files. You can simply modify it to play your raw file or even rtp capture. 

Jozsef

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Today's Topics:

   1. Re: Playing captured speex frames (Ashhar Farhan)


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Message: 1
Date: Sat, 9 Jul 2011 07:19:10 +0530
From: Ashhar Farhan <farhan at phonestack.com>
Subject: Re: [Speex-dev] Playing captured speex frames
To: "Shridhar, Vasant" <vasant.shridhar at harman.com>,	Vinod Panicker
	<vinod.p at gmail.com>, 	"speex-dev at xiph.org" <speex-dev at xiph.org>
Message-ID:
	<CACUhZhWhg9+37Utmj4ioazHiSckZTdj00ZsQbkFE9kEDggDTXw at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

Adding ogg header won't do. The ogg is an envelope, not a header.
Lemme see the speex code and mail you the results. I remember that speexdec processes raw packets and not ogg. There must be an issue with wireshark itself. Can you send me the output from wireshark?
- farhan

On 7/8/11, Shridhar, Vasant <vasant.shridhar at harman.com> wrote:
> Speexdec is expecting the frames to be wrapped in an Ogg frame I believe.
> Since you have the raw data can't you just add the Ogg header 
> information to this before passing it to Speexdec?
>
> Vas
>
> ________________________________________
> From: speex-dev-bounces at xiph.org [speex-dev-bounces at xiph.org] On 
> Behalf Of Vinod Panicker [vinod.p at gmail.com]
> Sent: Friday, July 08, 2011 12:13 AM
> To: speex-dev at xiph.org
> Subject: Re: [Speex-dev] Playing captured speex frames
>
> On Fri, Jul 8, 2011 at 6:39 AM, Ashhar Farhan <farhan at phonestack.com> wrote:
>> what you need to do is this: take the wireshark raw dump, read each 
>> udp packet and write it back to another file. While writing back to 
>> the new file skip the sizeof udp header + rtp header. I can't recall 
>> how many bytes you need to skip, however, I suppose it would be in 
>> the range of 36 and 32 bytes. A five line perl script will do it.
>
> Thanks for the suggestion, but Wireshark already does what you've 
> suggested. There's an option to save the raw payload to a file. This 
> file only has the speex frames (no udp+rtp headers). speexdec still 
> complains about it not being a valid speex file presumably because the 
> file is missing the header.
>
> Apart from manually constructing a header and prefixing it to the 
> file, any other ideas?
>
> Regards,
> Vinod.
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