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From root@ihack.net Mon, 1 Nov 1999 10:09:26 -0500 (EST)
Date: Mon, 1 Nov 1999 10:09:26 -0500 (EST)
From: Charles M. Hannum root@ihack.net
Subject: [Livid-dev] Observed decoding problems

I have observed the following difficulties so far:

1) Demuxing of multiple camera angles doesn't work.  If I select video
   stream 0, I get all the angles, in alternating blocks.  If I select
   another video stream, I don't get anything.  I haven't yet
   determined how to actually differentiate the data streams.  [Tested
   with `Sarah McLachlan: Mirrorball'.]

2) Also associated with the above, I get a `repeating' effect on the
   audio in the same chapters.  (It repeats each chunk 4 times.)

3) There seem to be some (possibly buggy) AC-3 streams that cause the
   decoder to barf with lots of `Invalid mantissa' and `Invalid
   exponent' messages.  [I'm forgetting now which disc I noticed this
   on.  Could possibly be related to getting out of sync due to
   problem #2.]

4) I've observed at least one disc to have a pair of
   Sequence_end_code/Sequence_start_code buried in the middle of the
   video stream.  Currently the Sequence_end_code causes the video
   decoder to just stop (even though the audio will keep playing).

5) At the beginning of `Strange Days', there's a very noticable
   `warbling' effect during the 20th Century Fox trailer.  I tried
   disabling the normalization hack in output_play() just to be sure,
   and I can vouch that it wasn't that code at fault.  (Note: This
   happens on both the English and French 2.0/ProLogic tracks, but not
   the English 5.1 track.)  I'll try this on a standalone player later
   today.

From shadow@dementia.org Tue, 2 Nov 1999 21:44:09 -0500 (EST)
Date: Tue, 2 Nov 1999 21:44:09 -0500 (EST)
From: Derrick J Brashear shadow@dementia.org
Subject: [Livid-dev] Observed decoding problems

On Mon, 1 Nov 1999, Charles M. Hannum wrote:

> 3) There seem to be some (possibly buggy) AC-3 streams that cause the
>    decoder to barf with lots of `Invalid mantissa' and `Invalid
>    exponent' messages.  [I'm forgetting now which disc I noticed this
>    on.  Could possibly be related to getting out of sync due to
>    problem #2.]

I noticed it on X Files; Decoding all or 0xbx instead of just 0xbc fixed
it. I should see if they were all just 0xbc or 0xbb

-D

From root@ihack.net 03 Nov 1999 14:03:43 -0500
Date: 03 Nov 1999 14:03:43 -0500
From: Charles M. Hannum root@ihack.net
Subject: [Livid-dev] Observed decoding problems

Derrick J Brashear <shadow@dementia.org> writes:

> On Mon, 1 Nov 1999, Charles M. Hannum wrote:
> 
> > 3) There seem to be some (possibly buggy) AC-3 streams that cause the
> > decoder to barf with lots of `Invalid mantissa' and `Invalid
> > exponent' messages. [I'm forgetting now which disc I noticed this
> > on. Could possibly be related to getting out of sync due to
> > problem #2.]
> 
> I noticed it on X Files; Decoding all or 0xbx instead of just 0xbc fixed
> it. I should see if they were all just 0xbc or 0xbb

I looked at the stream IDs, and there are no `strange' ones in either
disc (`Sarah McLachlan: Mirrorball', and `Who Framed Roger Rabbit?').

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