audio ok, but corrupted video?

[gsteele@e...]

I have also had similar problems.

Has anyone tried the ExtractStream software on tivo 1.3.0?

I've got an HDR112, and I haven't plugged it in to the phone to let it
upgrade itself yet: I bought the tivo to use it as a digital VCR, not
to subscribe to the service, and I'm a bit worried about the software
upgrade stories I've heard.

When I try to run ExtractStream, I run into a set of errors starting
with "bad chunk", and then continuous complaints about bogus sequence
numbers. The resulting .m2a file plays fine, but the .m2v file is just
full of junk: it's only a couple of kb. Sometimes, gtv (smpeg based
player) identifies it as a 352x480 (?) stream, but there is no video
in the file.

I was using ExtractStream version 0.2.

Also, an unrelated question: what resolution is the mpeg stream the
tivo records? Is it 640x480? Just curious.

Thanks,
Gary.


--- In ExtractStream@y..., sharkey@a... wrote:
> 
> Ok, I followed the instructions that used to be posted on the 9thtee
> site and pulled a 30 minute medium quality stream off my tivo. (16
hours
> over the serial link, ugh, TivoNet ordered)
> 
> I haven't been able to play the files I got, though. The audio file
seems
> to be a normal mpeg 1 layer 2 audio file and that plays just fine
with
> mpg123. The video file is identified as mpeg video file by the file
> command, but when I run it through mplex, I get:
> 
> marvin% mplex -f 2 -m 2 -o program1.mpeg2 program1.m2[av]
> INFO: mplex version 1.4.1 (7.12.2000)
> INFO: File program1.m2a is a 11172-3 Audio stream.
> INFO: File program1.m2v is a MPEG-1/2 Video stream.
> INFO: Scanning Video stream for access units information.
> INFO: VIDEO STREAM:
> INFO: nStream length : 682563565
> INFO: Sequence start : 4117
> INFO: Sequence end : 0
> INFO: No. Pictures : 62925
> INFO: No. Groups : 4117
> INFO: No. I Frames : 4117 avg. size 38024 bytes
> INFO: No. P Frames : 16983 avg. size 16661 bytes
> INFO: No. B Frames : 41825 avg. size 5811 bytes
> INFO: No. D Frames : 0 avg. size 0 bytes
> INFO: Horizontal size: 352
> INFO: Vertical size : 480
> INFO: Aspect ratio : 0.6735 
> INFO: Picture rate : 29.970 frames/sec
> [lots more INFO clipped]
> INFO: New sequence commences...
> INFO: sectors muxed: audio=0000000 video=00000000 padding=0000000
> **ERROR: Likely buffer under-run at video sector 105
> **ERROR: Likely buffer under-run at video sector 105
> **ERROR: Likely buffer under-run at video sector 105
> **ERROR: Likely buffer under-run at video sector 105
> **ERROR: Likely buffer under-run at video sector 105
> **ERROR: Likely buffer under-run at video sector 105
> 
> It produces less than 2MB worth of mpeg2 output. When I try to play
that,
> I can hear just fine, but the video is garbled and corrupt. And it
only
> lasts for about 4 seconds.
> 
> Has anyone else seen something like this?
> 
> When I ran ExtractStream, I did get some Bad chunk errors and
sequence
> number errors. Is this normal?
> 
> [TiVo [p0] root]# ExtractStream 267097 267103
> Attempting to locate tyStream with fsid 267097...
> Sector FSID passed (41359) failed to match the FSID value in the
sector (1359).
> ...tyStream located, sector map follows:
> Start Length
> 01a80000 00080000
> 00c40000 00040000
> 00c80000 00040000
> Block: 1a80000 Count: 524288 Total blocks 3
> /dev/hda10 has 0x00100000 sectors
> /dev/hda11 has 0x03606c00 sectors
> Bad chunk, skipping
> Bad chunk, skipping000
> Block: c40000 Count: 262144 Total blocks 3
> Block: c80000 Count: 262144 Total blocks 3
> Sequence number bogus 26503c!=247438 at record 0 of 51
> Sequence number bogus 249700!=229e48 at record 0 of 50
> Bad chunk, skipping000
> Attempting to locate tyStream with fsid 267103...
> ...tyStream located, sector map follows:
> Start Length
> 00e00000 00040000
> 00e40000 00020000
> 00e60000 00004000
> Block: e00000 Count: 262144 Total blocks 3
> Bad chunk, skipping000
> Block: e40000 Count: 131072 Total blocks 3
> Sequence number bogus 267dc0!=24a948 at record 0 of 61
> Block: e60000 Count: 16384 Total blocks 3
> Sequence number bogus 211b90!=2c04c0 at record 0 of 51
> Sequence number bogus 28b83c!=24946c at record 0 of 64
> Sequence number bogus 28b83c!=266b90 at record 0 of 63
> Sequence number bogus 28b83c!=283c78 at record 0 of 56
> Sequence number bogus 28b83c!=2a200c at record 7 of 59
> audio failure 0x4f4:0:0x170 0x24:0x69:0x1a
> Sequence number bogus 28b83c!=2bf338 at record 0 of 69
> Sequence number bogus 28b83c!=20f7ac at record 0 of 64
> Sequence number bogus 28b83c!=22c138 at record 0 of 52
> Sequence number bogus 28b83c!=24aaec at record 0 of 62
> Sequence number bogus 28b83c!=2682b0 at record 0 of 71
> Sequence number bogus 28b83c!=284f34 at record 0 of 60
> Sequence number bogus 28b83c!=2a23c8 at record 0 of 56
> Sequence number bogus 28b83c!=2c063c at record 0 of 60
> Sequence number bogus 28b83c!=211228 at record 0 of 69
> Sequence number bogus 28b83c!=22db6c at record 0 of 52
> Sequence number bogus 28b83c!=24c1a4 at record 0 of 70
> Sequence number bogus 28b83c!=2688e8 at record 4 of 57
> audio failure 0x4d4:0:0x18c 0xca:0x18:0xe1
> Sequence number bogus 28b83c!=286660 at record 0 of 58
> Sequence number bogus 28b83c!=2a3edc at record 7 of 63
> audio failure 0x4d4:0:0xc0 0x77:0x1f:0x4c
> Sequence number bogus 28b83c!=2c12d0 at record 0 of 60
> Sequence number bogus 28b83c!=2121b8 at record 0 of 50
> Sequence number bogus 28b83c!=22fddc at record 0 of 70
> Sequence number bogus 28b83c!=24ca7c at record 2 of 66
> Sequence number bogus 28b83c!=26a504 at record 0 of 61
> Sequence number bogus 28b83c!=288054 at record 0 of 61
> Sequence number bogus 28b83c!=2a5164 at record 0 of 67
> Sequence number bogus 28b83c!=2c1abc at record 0 of 58
> Sequence number bogus 28b83c!=212da4 at record 0 of 50
> Sequence number bogus 28b83c!=2309d8 at record 0 of 66
> Sequence number bogus 28b83c!=24dd6c at record 0 of 61
> Sequence number bogus 28b83c!=26b1e4 at record 0 of 60
> Sequence number bogus 28b83c!=289278 at record 5 of 69
> audio failure 0x5a4:0:0x224 0xc5:0x91:0x64
> Sequence number bogus 28b83c!=2a59e8 at record 0 of 58
> Flushing buffers
> 
> 
> Eric