[ExtractStream] extractstream update/test

[Badness]

That link doesn't work for me.

----- Original Message -----
From: "Dale Reed" <daler@n...>
To: <ExtractStream@yahoogroups.com>
Sent: Monday, October 29, 2001 5:28 AM
Subject: [ExtractStream] extractstream update/test


>
> Ok, I haven't done a lot of testing on this, but here is my
> first attempt at an update to ES that includes something
> "useful". I added two options to ES. The first is -t,
> which is strictly a "test" that go through all the motions, but
> never writes anythign out. The second is -f, which skips the
> first and last blocks of a sector map. See below for why you'd
> want to do this.
>
> Now, I pulled parse_chunk from SplitStream and threw it into
> ES. Then I moded parse_chunk to not include bad chunks.
> What I found was below. The first extraction was without the
> skip flag, the second included it. I prettied up the output
> by adding linefeeds to it, BTW.
>
> I'm trying to pinpoint errors in the extraction to the specific
> places to where they are extracted from. Mainly looking for boundary
> types of things right now, to see if there could be an offset
> issue.
>
> You can get this modded extractstream from:
>
> http://www.ntworld.com/tivo/es3
>
> (and yes, there is source up there as well...). So far I pulled
> a couple of shows off, used splitstream on them, and the audio and
> video look good. One did have a bad.ty, though. Still more work
> to go...
>
> > bash-2.02# ./es3 -t 976702 976703 976704
> >
> > Attempting to locate tyStream with fsid 976702...
> > ...tyStream located, sector map follows:
> >
> > Start End Length
> > 00280000 00300000 00080000
> > 03123400 031a3400 00080000
> >
> > Block: 280000 Count: 524288 Total blocks 2
> > /dev/hda10 has 0x00100000 sectors 0x00000000-0x00100000
> > /dev/hda11 has 0x017a1400 sectors 0x00100000-0x018a1400
> >
> > Playing block 00280000
> > Bad chunk (header?) 0, skipping
>
>
> It seems the first chunk is always bad.
>
>
> > Playing block 00300000
> > Bad chunk (header?) 524288, skipping
>
>
> This is also interesting. If you look at the above modded
> debug, you'll see 00300000 is the last block of this sector map/group.
> You'll see a pattern below:
>
> > Block: 3123400 Count: 524288 Total blocks 2
> >
> > /dev/hda12 has 0x00002000 sectors 0x00000000-0x00002000
> > /dev/hda13 has 0x01fb8900 sectors 0x00002000-0x01fba900
> > Playing block 031a3400
> > Bad chunk (header?) 524288, skipping
>
>
> Looking at the start/end map above, 031a3400 is the first
> chunk of this sector map/group. However, no error here
> on 031a3400, the end...
>
>
> > Attempting to locate tyStream with fsid 976703...
> > ...tyStream located, sector map follows:
> >
> > Start End Length
> > 00900000 00a00000 00100000
> >
> > Block: 900000 Count: 1048576 Total blocks 1
> > Playing block 00900000
> > Bad chunk (header?) 0, skipping
> > Playing block 00a00000
> > Bad chunk (header?) 1048576, skipping
>
>
> Errors on both start and end chunks...
>
>
> > Attempting to locate tyStream with fsid 976704...
> > ...tyStream located, sector map follows:
> >
> > Start End Length
> > 01680000 016c0000 00040000
> > 016c0000 016e0000 00020000
> >
> > Block: 1680000 Count: 262144 Total blocks 2
> > Playing block 01680000
> > Bad chunk (header?) 0, skipping
> > Block: 16c0000 Count: 131072 Total blocks 2
> > Playing block 016e0000
>
>
> Errors on start chunk, but not the other ones. Wierd...
>
> The below is not including the first/last chunks with -f.
> Not sure where the audio failure comes into play.
>
>
> > ------------------------------------------------------
> >
> > bash-2.02# ./es3 -t -f 976702 976703 976704
> >
> > Attempting to locate tyStream with fsid 976702...
> > ...tyStream located, sector map follows:
> >
> > Start End Length
> > 00280000 00300000 00080000
> > 03123400 031a3400 00080000
> >
> > Block: 280000 Count: 524288 Total blocks 2
> > /dev/hda10 has 0x00100000 sectors 0x00000000-0x00100000
> > /dev/hda11 has 0x017a1400 sectors 0x00100000-0x018a1400
> > Block: 3123400 Count: 524288 Total blocks 2
> >
> > /dev/hda12 has 0x00002000 sectors 0x00000000-0x00002000
> > /dev/hda13 has 0x01fb8900 sectors 0x00002000-0x01fba900
> > Playing block 03123500
> >
> > audio failure 0:0x2b4 0x9f:0x77:0x3e chunk 256
> >
> > Playing block 031a3300
> >
> > Attempting to locate tyStream with fsid 976703...
> > ...tyStream located, sector map follows:
> >
> > Start End Length
> > 00900000 00a00000 00100000
> >
> > Block: 900000 Count: 1048576 Total blocks 1
> > Playing block 009fff00
> >
> > Attempting to locate tyStream with fsid 976704...
> > ...tyStream located, sector map follows:
> >
> > Start End Length
> > 01680000 016c0000 00040000
> > 016c0000 016e0000 00020000
> >
> > Block: 1680000 Count: 262144 Total blocks 2
> > Block: 16c0000 Count: 131072 Total blocks 2
> > Playing block 016dff00
>
>
>
> --
> Dale
>
> -> Philips SA Tivo 2.0.1, tivonet, tivomad 14gb->30gb (single)
>
>
>
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