Significance of "Pack Header Not Found"

[ukb008]

Hi.

Pack Header not found. Read Errors 0.

What is the significance of this "Pack Header Not Found" message appearing together with 0 Read Errors? Does this mean the DVD will give playback problems (freeze-frames etc)?

I am asking because I have seen that the DVDs that elicit read errors in DVDDecrypter does indeed produce playback problems in my computer.

Presumably those read errors are only I/O issues, while the Pack Header Not Found is a mastering error. If I( am wrong, please correct me.

Regards.

[LIGHTNING UK!]

Well either of those errors will probably cause a problem for a player.

They both ultimately mean a sector contains no useful data.

[ukb008]

Your software is a depenble tool for purposes other than transcoding. I often use it to test used DVDs before buying. A DVD that DVDDecrypter can decrypt without a fuss can be purchased with eyes wide shut.

Regards

[darkavatar1470]

wow, i was just having the same problem:

W 22:30:27 Skipping Sector 1830384 - Pack Header Not Found (0x00000000)
~ ~ ~
W 22:30:27 Skipping Sector 1830399 - Pack Header Not Found (0x00000000)

I'm wondering if there is any data lost in those skiped sectors,
does it have any effect on encoding ?

[ukb008]

Skipped sectors aren't included in the final ripped file. Usually these are fractions of seconds and aren't too noticeable. There will be no problems on encoding.

When there are unreadable sectors because of I/O issues, and DVDDecrypter is made to ignore read errors, the resulting file is perfectly encodable.

When, however, the bad areas ares really big (say, a few minutes), and one has to exclude them by some other means, the resulting file will exhibit subtitle asynchronicity after the hitch because of disturbed time-stamps.

DVDDecrypter can cope with small unreadable areas (a few seconds) but for big ones it takes too long. I use chopper XP to extract the portion after the hitch, and you need some trials and errors to hit upon the exact spot where you'll have minimal file-loss.

Regards.