Error with PCM audio on Led Zepplin DVD

[Raster]

While trying to backup the Led Zepplin DVD I ran into this problem.

The problem is with the PCM audio track. As you can see below VTS02 contains 3 audio tracks.


VTS02 Examined with IFOEdit:

Title Set (Movie) attributes:
Video: MPEG-2 720x480 (NTSC) (NTSC 525/60) (4:3) (not specified perm.display)
Audio 1: Not Specified (Linear PCM) 2ch 48Kbps 16bps (ID: 0xa0)
Audio 2: Not Specified (Dolby AC-3) 6ch 48Kbps DRC (ID: 0x81)
Audio 3: Not Specified (DTS ) 5ch 48Kbps DRC (ID: 0x8a)



After Doitfast4u completed its work Reauthorist crashed when examining the files.
On inspection of the Reauthorist log file I noted the last file that was read was the PCM track (Audio 1) renamed by Doitfast as shown below.


Doitfast renamed Audio 1:
VTS__02_P01-81-1536K-[0ms.AC3ms]-ch_2_PGC_01_1 - 0x81 - Audio - AC3 - 6ch - 48kHz - DRC.WAV

I renamed the file to filename.bak and started up Reauthorist and it opened up fine and replaced the missing audio track with a dummy track.


Anyone else have this problem?



I am Using:
Doitfast4U 1.1.1
Reauthorist 1.0.0
Avisynth 2.08


Thanks in advance

Raster

[brashquido]

Never used PCM. That feature has only been there since RC2 from memory, so it's still pretty young.

[Raster]

"Never used PCM. That feature has only been there since RC2 from memory, so it's still pretty young."

Huh!? Sorry I don't understand what you mean.

[brashquido]

Support for PCM audio in ReAuthorist was only added a few versions back, so it's implementation may not be perfect yet. Does the demuxed PCM audio stream from DIF4U have the same naming convention as the other two? I once had a DTS stream which was named properly so RA put a dummy there in it's place.

[influenza]

I don't know if reauthorst can handle wav files correctly now, a couple of weeks a go it couldn't. But if I where you I would just import your scenarist script, import your wav file seperately and replace the dummy file with your wav file.

[palle_k]

According to the changelog of the DIF4U beta there was an error with the naming of PCM streams in version 1.1.1. Try downloading the latest beta since this might solve your problem.

[Raster]

:D
Thanks to everyone for all your help and suggestions.

@brashquido
Thanks for the warning about PCM in ReAuthorist.


@influenza
I thought of doing just that (replacing dummy with wav file) but, than realized that I would have to recalculate the bitrates to make everything fit and thats what I want ReAuthorist to do.

@palle_k
I took a look at the DIF4U changelog and sure enough, there was a problem with the nameing of PCM files. I tried again with ver1.1.4 beta and it worked! DIF4U named the PCM correctly and ReAuthorist was able to read it. I did not have time to run ReAuthorist tonight so I can't say if there will be anymore problems later.

Anyway, now that I have the PCM file in there, I've got to decide if it's worth keeping being that it's such a large file (over 1.09GB) that it really pounds the bitrate of the main movie (1916kbps with PCM and 3435kbps without it).

[aquabubble]

Hi raster,

Sorry for the late response. Seems DoItFast4U has mis-renamed this AC3 file:

VTS__02_P01-81-1536K-[0ms.AC3ms]-ch_2_PGC_01_1 - 0x81 - Audio - AC3 - 6ch - 48kHz - DRC.WAV

In which case, you need to correct it to:

VTS__02_P01-80-1536K-[0ms]-ch6Not-Specified.AC3

(I think I'll need to add some error detection in my file name parsing routines) ;)

[Raster]

Hi aquabubble,

Thanks for the response. Does not seem to be any problems with AC3 file renaming in DIF4U but, with PCM file renaming. Seems that DIF4U ver1.1.4 beta fixed that issue as far as I can tell.

"(I think I'll need to add some error detection in my file name parsing routines)"
Thats not a bad idea, although for me the log file was helpful for finding where things went wrong.

I'd like to say that other than the PCM problem, the other backups I tried with ReAuthorist went smoothly. Great Job! and thanks!



Raster