On 09/12/2018 05:53 PM, Ed Greshko wrote:
On 9/13/18 7:40 AM, JD wrote:
>
> On 09/12/2018 04:39 PM, Cameron Simpson wrote:
>> On 13Sep2018 08:29, Cameron Simpson <cs(a)cskk.id.au> 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(a)cskk.id.au>
> 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!!!!
>
libdvdcss did not screw up at all. "cat" is unaware of, and doesn't use,
libdvdcss.
So, how in tarnation can I back up this DVD.
What tool can I use that will use dvdcss AND
back up the DVD???