On 09/12/2018 04:39 PM, Cameron Simpson wrote:
On 13Sep2018 08:29, Cameron Simpson <cs@xxxxxxxxxx> wrote:
Regarding the DVD CSS stuff: I seem to recall from long ago that
reading a CSS DVD without the libdvdcss stuff to arrange decoding
produced read issues, not just garbled data. This might be that.
Ah, here we go. In the tar-1.30 source, src/create.c, around line
1104. The "shrank...padding" message happens if tar gets a short read
(not an I/O error).
So I think the VOB file read is very short. See if other tools can
read that file, since it is a mounted drive.
Cheers,
Cameron Simpson <cs@xxxxxxxxxx>
I tried that, and it is clear that tar is unable to read the drive. To wit:
$ ls -l VTS_10_1.VOB
-r--------. 1 jd jd 1073739776 Mar 18 2013 VTS_10_1.VOB
$ cat VTS_10_1.VOB | wc -c
cat: /run/media/jd/JACK_REACHER/VIDEO_TS/VTS_10_1.VOB: Input/output error
4067328
So, the output file was padded by zeros instead of the real McCoys!!!
In other words, dvdcss screwed up royally, and I cannot use the backup
as replacement if my DVD gets seriously damaged by a bad player drive.
Just wonderbar!!!!
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