[Extractstream [MM]] New GPLed demux (split) tool for Dtivo - need help with SA streams

[Olaf Beck]

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Hello Folks,

I have coded a new tool tydemux to split Dtivo TyStreams it's working nice for 
me but I only have Dtivo ver 2.5.2. Hence I need help with debugging 
(testing) and also samples of SA Tivo and UK Tivo streams so I can make it 
work with those models too. Tydemux comes in both a Linux and a Windows 
version + sources for all other Unix systems (but it's only tested on Linux 
and Windows).

The final goal is to produce  SVCD and DVD compliant MPEG streams directly 
from the TyStream (i.e. remux). At the moment I'm working on the internal 
tanscode of the audio (AC3 48kHz to AC3/MPEG Layer II 44.1kHz) it's working 
but the sound quality is not up to spec so it's ifdef out in the release 
code.

Anyways tydemux is quite easy to use  just do

tydemux -i my_ty_stream -v video_out -a audio_out 

tydemux will probe the stream for audio type (AC3/MPEG) and extract the right 
audio stream based on it's finding during the probe. There is naturally has 
functions to jump to specific start sectors and also to set the audio type 
manually. Just remember it's Dtivo only (well you can go a head and test in 
on a SA/UK - it's just that I don't have one so I can't test those streams).

If you get a audio pes size error during the split it's not fatal but I'm very 
interested to get a sample of your stream.

Speaking of samples and streams, I have set up a ftp server where you can 
upload TyStream (not download this is a upload only server). I have also made 
a special sample prog which is included in the zip file. It will collect 10 * 
10MB  samples from the stream. Hence you don't need to upload the whole 
stream if you want. You can naturally upload the whole stream too but let try 
to keep the file size under 700MB.  Another way to make a small sample is to 
use dd* - just do "dd if=yourtysteam of=stream_to_send bs=131072 count=30
skip=0" this will sample 30 chunks of the stream starting at chunk zero - just 
change the count and skip to the right part of the stream you want the sample 
from.

* Windows version avaliable in this zip 
http://unxutils.sourceforge.net/UnxUpdates.zip

The IP for the ftp server is 66.121.15.34, use ftp / email as login and passwd 
- then change to the upload dir before you send the file.

Cheers and thanks in advance Olaf

PS: It would be nice if the file name of the file you upload could include 
some info such as SA/UK/DTIVO, email address, TIVO version it would make 
things so much easier.



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