[Bug 391193] [NEW] Brasero defaults to --read-raw, creates bad-quality disks

[dermoth]

Public bug reported:

Binary package hint: brasero

This bug apply to the brasero application in Ubuntu Jaunty

When creating an audio disc copy (probably apply to any disks though) braserro uses cdrdao with the --read-raw 
parameter. As stated in the manual, --read-raw reads data and P-W subchannels uncorrected, which mean that any correctable errors is copied as-it to the image file.

If the CD burner supports writing R-W subchannel data, the resulting CD
therefore contains any read-errors (that are normally corrected) burnt
in the copied cd.

This usually works as cd players can still use the error correction data
to correct there errors, however these CDs are weaker since the have
errors burnt-in and may not work on some poor-quality players.

For instance I created two copies from a CD and none of them would work
on one of my cd players... for testing I re-copied the "broken" cd using
cdrdao with the "--read-subchan rw" option instead and the resulting cd
was perfectly readable on all my players.

The "--read-subchan rw" option makes a similar images but creates
corrected data and R-W subchannel data. This results in a better quality
reproduction without any subchannel data loss (ISRC, CD-TEXT, etc.). The
--read-raw option is generally used when working with intentionally
damaged disks bundled with copy protection systems.

** Affects: brasero (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  Binary package hint: brasero
  
- This bud apply to the brasero application in Ubuntu Jaunty
+ This bug apply to the brasero application in Ubuntu Jaunty
  
  When creating an audio disc copy (probably apply to any disks though) braserro uses cdrdao with the --read-raw 
  parameter. As stated in the manual, --read-raw reads data and P-W subchannels uncorrected, which mean that any correctable errors is copied as-it to the image file.
  
  If the CD burner supports writing R-W subchannel data, the resulting CD
  therefore contains any read-errors (that are normally corrected) burnt
  in the copied cd.
  
  This usually works as cd players can still use the error correction data
  to correct there errors, however these CDs are weaker since the have
  errors burnt-in and may not work on some poor-quality players.
  
  For instance I created two copies from a CD and none of them would work
  on one of my cd players... for testing I re-copied the "broken" cd using
  cdrdao with the "--read-subchan rw" option instead and the resulting cd
  was perfectly readable on all my players.
  
  The "--read-subchan rw" option makes a similar images but creates
  corrected data and R-W subchannel data. This results in a better quality
  reproduction without any subchannel data loss (ISRC, CD-TEXT, etc.). The
  --read-raw option is generally used when working with intentionally
  damaged disks bundled with copy protection systems.

-- 
Brasero defaults to --read-raw, creates bad-quality disks
https://bugs.launchpad.net/bugs/391193
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