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Posted by Franc Zabkar on 04/28/06 22:26
On Thu, 27 Apr 2006 20:09:37 -0700, Gene E. Bloch
<spamfree@nobody.invalid> put finger to keyboard and composed:
>On 4/27/2006, Franc Zabkar posted this:
>> On 25 Apr 2006 08:58:40 -0700, duffytweedy@gmail.com put finger to
>> keyboard and composed:
>>
>>> A few weeks ago I bought a Panasonic DMR-ES10 recorder, and have been
>>> moving my VHS home movies onto DVD-R steadily. Most of the DVDs I've
>>> recorded work fine everywhere, but not always. Sometimes the DVD plays
>>> fine in every home deck I try it in, but crashes every computer DVD
>>> player I try it in, Windows or Mac. It'll start playing but then
>>> freeze the program within five minutes, and I get messages like "DVD
>>> Player has encountered a problem. The disk may be dirty or damaged.
>>> The program will now close" or, "Media Player has encountered an error
>>> and will now close". My main reason for wanting to be able to read
>>> DVDs on my computer is to easily burn copies, but I'm also concerned in
>>> general about the DVDs I'm recording. I'm using the highest quality
>>> Taiyo Yuden DVD-R disks, by the way. Are computer DVD drives just
>>> more sensitive and picky than home players?
>>>
>>> One particular tape is causing me headaches. I have an old, cheap VHS
>>> tape that's a copy of an old, cheap VHS tape that was itself recorded
>>> from 1960s Super8 tape. So my VHS looks and sounds pretty bad. I've
>>> tried several times to record it to DVD, and each time it plays in
>>> decks but not on any computer. Odd coincidence? Or, and here I may be
>>> sounding dumb, could there be source material (crummy VHS) that is so
>>> poor that the DVD recorded from it is loopy and it giving sensitive DVD
>>> drives fits? Can the quality of the source possibly matter?
>>
>> Rather than attempting to *play* your DVD-R, I'd copy the files to a
>> directory on your PC HDD. Then I'd compare them byte-for-byte with the
>> originals. In this way you could eliminate any issues relating to
>> codecs, artifacts, etc.
>>
>> I'm still using Win98SE, so I'd compare the files from a DOS box using
>> the following command line:
>>
>> fc /b HD-folder\HD_files DVD-folder\DVD_files
>>
>> - Franc Zabkar
>
>The command still works in a command window in WinXP.
>
>Caveat: if either path name contains a blank it must be enclosed in
>double quotes.
>
>If the files are very different you probably won't be able to get much
>info from the thousands of differences reported.
>
>HTH,
>Gino
I'm not suggesting that the OP compare two DVD discs.
My original impression was that the OP's problem was somewhat
intermittent. Therefore the first read operation may not have shown up
any disc fault. This is because a DVD movie may play for over an hour
but require less than 10 minutes to copy to HDD. Several iterations of
the FC command may be required before any problems appear.
Another way to test the data integrity of a disc is to use the Xcopy
command:
echo f | xcopy d:\ nul /c /h /s > %temp%.\readtest.txt
This reads every file on the DVD (drive D:) and copies it to the
NUL device, ie into the bit bucket. The results of each read are
recorded in readtest.txt.
- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
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