[SOLVED] The source file '<Unknown>' is corrupt or invalid at offset 5300545536, attempting to work around

[Blu-Shield]

Trying to rip a certain Blu-ray Disc (MVM Entertainment's release of A Lull in the Sea), I get messages that "The source file '<Unknown>' is corrupt or invalid at offset 5300545536, attempting to work around". These messages always appear while MakeMKV is ripping the 4th file on the disc (episode 4). The rip nonetheless seems to complete successfully, but I'm wondering if these messages are an indication of a damaged file.

Here are the messages from the MakeMKV bottom window (with "Log debug messages" and "Show AV synchronization messages" turned on):

Code: Select all

MakeMKV v1.14.5 linux(x64-release) started
Debug logging enabled, log will be saved as /home/andrew/MakeMKV_log.txt
Using direct disc access mode
LibreDrive firmware support is not yet available for this drive (id=084D9C17F942)
Loaded content hash table, will verify integrity of M2TS files.
File 01000.mpls was added as title #0
File 01001.mpls was added as title #1
File 01002.mpls was added as title #2
File 01003.mpls was added as title #3
File 01004.mpls was added as title #4
File 01005.mpls was added as title #5
File 01006.mpls was added as title #6
File 01007.mpls was added as title #7
File 01008.mpls was added as title #8
File 01009.mpls was added as title #9
File 01010.mpls was added as title #10
File 01011.mpls was added as title #11
File 01014.mpls was added as title #12
Title 00000.m2ts is equal to title 01000.mpls and was skipped
Title 00001.m2ts is equal to title 01001.mpls and was skipped
Title 00002.m2ts is equal to title 01002.mpls and was skipped
Title 00003.m2ts is equal to title 01003.mpls and was skipped
Title 00004.m2ts is equal to title 01004.mpls and was skipped
Title 00005.m2ts is equal to title 01005.mpls and was skipped
Title 00006.m2ts is equal to title 01006.mpls and was skipped
Title 00007.m2ts is equal to title 01007.mpls and was skipped
Title 00008.m2ts is equal to title 01008.mpls and was skipped
Title 00009.m2ts is equal to title 01009.mpls and was skipped
Title 00010.m2ts is equal to title 01010.mpls and was skipped
Title 00011.m2ts is equal to title 01011.mpls and was skipped
File 00012.m2ts was added as title #13
File 00013.m2ts was added as title #14
Title 00014.m2ts is equal to title 01014.mpls and was skipped
File 00015.m2ts was added as title #15
File 00016.m2ts was added as title #16
Operation successfully completed
Saving 17 titles into directory /media/andrew/My Passport/andrew/MakeMKV output/A Lull in the Sea/BD_1_3
Forced subtitles track #4 turned out to be empty and was removed from output file
Forced subtitles track #6 turned out to be empty and was removed from output file
Forced subtitles track #4 turned out to be empty and was removed from output file
Forced subtitles track #6 turned out to be empty and was removed from output file
Forced subtitles track #4 turned out to be empty and was removed from output file
Forced subtitles track #6 turned out to be empty and was removed from output file
DEBUG: Code 1 at ,Y`,O(ZBY7R&LJ)[]KL:121262877
DEBUG: Code 1 at ,Y`,O(ZBY7R&LJ)[]KL:121262877
DEBUG: Code 1 at ,Y`,O(ZBY7R&LJ)[]KL:121262877
DEBUG: Code 1 at ,Y`,O(ZBY7R&LJ)[]KL:121262877
Forced subtitles track #4 turned out to be empty and was removed from output file
Forced subtitles track #6 turned out to be empty and was removed from output file
The source file '<Unknown>' is corrupt or invalid at offset 5300545536, attempting to work around
The source file '<Unknown>' is corrupt or invalid at offset 5300545536, attempting to work around
The source file '<Unknown>' is corrupt or invalid at offset 5300545536, attempting to work around
The source file '<Unknown>' is corrupt or invalid at offset 5300545536, attempting to work around
Forced subtitles track #4 turned out to be empty and was removed from output file
Forced subtitles track #6 turned out to be empty and was removed from output file
Forced subtitles track #4 turned out to be empty and was removed from output file
Forced subtitles track #6 turned out to be empty and was removed from output file
Forced subtitles track #4 turned out to be empty and was removed from output file
Forced subtitles track #6 turned out to be empty and was removed from output file
Forced subtitles track #4 turned out to be empty and was removed from output file
Forced subtitles track #6 turned out to be empty and was removed from output file
Forced subtitles track #4 turned out to be empty and was removed from output file
Forced subtitles track #6 turned out to be empty and was removed from output file
Forced subtitles track #4 turned out to be empty and was removed from output file
Forced subtitles track #6 turned out to be empty and was removed from output file
17 titles saved

Here's the contents of the log file, which is a bit more detailed:

Code: Select all

Debug log started at Wed Nov  6 06:22:02 2019 , written by MakeMKV v1.14.5 linux(x64-release)
Using 262272KB for read cache.
001005:0000 MakeMKV v1.14.5 linux(x64-release) started
001004:0000 Debug logging enabled, log will be saved as /home/andrew/MakeMKV_log.txt
001003:0020 DEBUG: Code 0 at 8Z9')"E=^}]^lh_bh52\.=*:213130122
SDF  v063: TSSTcorp_BDDVDW_SE-506CB_TS02_S15E6YKH4006RD
SDF  v063: TSSTcorp_BDDVDW_SE-506CB_TS02_S15E6YKH4006RD
003007:0000 Using direct disc access mode
SDF  v063: TSSTcorp_BDDVDW_SE-506CB_TS02_S15E6YKH4006RD
001011:0000 LibreDrive firmware support is not yet available for this drive (id=084D9C17F942)
DEBUG: Code 2317353437 at lH]X/?PO~dv$@a$Ac:121264096
DEBUG: Code 0 at lH]X/?PO~dv$@a$Ac:121264119
DEBUG: Code 2317353437 at lH]X/?PO~dv$@a$Ac:121264096
DEBUG: Code 1 at lH]X/?PO~dv$@a$Ac:121264119
DEBUG: Code 2317353437 at lH]X/?PO~dv$@a$Ac:121264096
DEBUG: Code 2 at lH]X/?PO~dv$@a$Ac:121264119
DEBUG: Code 2317353437 at lH]X/?PO~dv$@a$Ac:121264096
DEBUG: Code 3 at lH]X/?PO~dv$@a$Ac:121264119
DEBUG: Code 2317353437 at lH]X/?PO~dv$@a$Ac:121264096
DEBUG: Code 4 at lH]X/?PO~dv$@a$Ac:121264119
DEBUG: Code 2317353437 at lH]X/?PO~dv$@a$Ac:121264096
DEBUG: Code 5 at lH]X/?PO~dv$@a$Ac:121264119
DEBUG: Code 2317353437 at lH]X/?PO~dv$@a$Ac:213132652
DEBUG: Code 0 at X])n#SpGfac$1n69:213141530
DEBUG: Code 0 at NK#"t]-b?7QNQvv6:29400669
DEBUG: Code 2147483648 at X])n#SpGfac$1n69:213132974
DAFD=PAAAADAAAAEABDQkEHwECAQ==
DCE=nl3qiDIguAZGcVZ4aXn00qf3d2qAhd14pLPXz9NK4mgV+vPFcLvSCxOkuPG2CXK1UXzLKDiEMzr7LxsTbR4Tk3J78YjDIbmSVmRPKua2L/Jbdvapcv8XyKsVn1XWhGs+YbeIPt81dHKE3ilDdGH+upoTHcRTxcYN+g==
DCE=Uq3qFaiGZaV1p0FMfJP54XaC3sbXk4kHPCOdtwQ/kOu+sb3mLEWtA01Qkh2WUh14+dFLNog1h1aNTEguxDELBJySlBc5rzMYqiB96AO849H118E0BFsktUAnARHImfz3Uk5+dd4HBKeVRXYR2/PxacEZHqrp3RJ5Og==
005085:0000 Loaded content hash table, will verify integrity of M2TS files.
DISCID=9F674290B4F426EFB01D3935CE0DC307754C3A50
001003:0020 DEBUG: Code 0 at 8Z9')"E=^}]^lh_bh52\.=*:213130122
003307:0000 File 01000.mpls was added as title #0
003307:0000 File 01001.mpls was added as title #1
003307:0000 File 01002.mpls was added as title #2
003307:0000 File 01003.mpls was added as title #3
003307:0000 File 01004.mpls was added as title #4
003307:0000 File 01005.mpls was added as title #5
003307:0000 File 01006.mpls was added as title #6
003307:0000 File 01007.mpls was added as title #7
003307:0000 File 01008.mpls was added as title #8
003307:0000 File 01009.mpls was added as title #9
003307:0000 File 01010.mpls was added as title #10
003307:0000 File 01011.mpls was added as title #11
003307:0000 File 01014.mpls was added as title #12
003309:0000 Title 00000.m2ts is equal to title 01000.mpls and was skipped
003309:0000 Title 00001.m2ts is equal to title 01001.mpls and was skipped
003309:0000 Title 00002.m2ts is equal to title 01002.mpls and was skipped
003309:0000 Title 00003.m2ts is equal to title 01003.mpls and was skipped
003309:0000 Title 00004.m2ts is equal to title 01004.mpls and was skipped
003309:0000 Title 00005.m2ts is equal to title 01005.mpls and was skipped
003309:0000 Title 00006.m2ts is equal to title 01006.mpls and was skipped
003309:0000 Title 00007.m2ts is equal to title 01007.mpls and was skipped
003309:0000 Title 00008.m2ts is equal to title 01008.mpls and was skipped
003309:0000 Title 00009.m2ts is equal to title 01009.mpls and was skipped
003309:0000 Title 00010.m2ts is equal to title 01010.mpls and was skipped
003309:0000 Title 00011.m2ts is equal to title 01011.mpls and was skipped
003307:0000 File 00012.m2ts was added as title #13
003307:0000 File 00013.m2ts was added as title #14
003309:0000 Title 00014.m2ts is equal to title 01014.mpls and was skipped
003307:0000 File 00015.m2ts was added as title #15
003307:0000 File 00016.m2ts was added as title #16
005011:0000 Operation successfully completed
005014:0000 Saving 17 titles into directory /media/andrew/My Passport/andrew/MakeMKV output/A Lull in the Sea/BD_1_3
004001:0000 Forced subtitles track #4 turned out to be empty and was removed from output file
004001:0000 Forced subtitles track #6 turned out to be empty and was removed from output file
004001:0000 Forced subtitles track #4 turned out to be empty and was removed from output file
004001:0000 Forced subtitles track #6 turned out to be empty and was removed from output file
004001:0000 Forced subtitles track #4 turned out to be empty and was removed from output file
004001:0000 Forced subtitles track #6 turned out to be empty and was removed from output file
001003:0020 DEBUG: Code 1 at ,Y`,O(ZBY7R&LJ)[]KL:121262877
001003:0020 DEBUG: Code 1 at ,Y`,O(ZBY7R&LJ)[]KL:121262877
001003:0020 DEBUG: Code 1 at ,Y`,O(ZBY7R&LJ)[]KL:121262877
001003:0020 DEBUG: Code 1 at ,Y`,O(ZBY7R&LJ)[]KL:121262877
004001:0000 Forced subtitles track #4 turned out to be empty and was removed from output file
004001:0000 Forced subtitles track #6 turned out to be empty and was removed from output file
004004:0000 The source file '<Unknown>' is corrupt or invalid at offset 5300545536, attempting to work around
004004:0000 The source file '<Unknown>' is corrupt or invalid at offset 5300545536, attempting to work around
004004:0000 The source file '<Unknown>' is corrupt or invalid at offset 5300545536, attempting to work around
004004:0000 The source file '<Unknown>' is corrupt or invalid at offset 5300545536, attempting to work around
004001:0000 Forced subtitles track #4 turned out to be empty and was removed from output file
004001:0000 Forced subtitles track #6 turned out to be empty and was removed from output file
004001:0000 Forced subtitles track #4 turned out to be empty and was removed from output file
004001:0000 Forced subtitles track #6 turned out to be empty and was removed from output file
004001:0000 Forced subtitles track #4 turned out to be empty and was removed from output file
004001:0000 Forced subtitles track #6 turned out to be empty and was removed from output file
004001:0000 Forced subtitles track #4 turned out to be empty and was removed from output file
004001:0000 Forced subtitles track #6 turned out to be empty and was removed from output file
004001:0000 Forced subtitles track #4 turned out to be empty and was removed from output file
004001:0000 Forced subtitles track #6 turned out to be empty and was removed from output file
004001:0000 Forced subtitles track #4 turned out to be empty and was removed from output file
004001:0000 Forced subtitles track #6 turned out to be empty and was removed from output file
005005:0080 17 titles saved
005036:0104 Copy complete. 17 titles saved.
Application exited at Wed Nov  6 18:05:10 2019

Testing steps I've tried:

• Increasing "Read retry count" from 5 (the default) to 25, as per the FAQ (I always set it to 25 - I don't know why this isn't the default)

• Attempting the rip 3 times (I got the same error messages each time, in the same position)

• Watching the rip for episode 4 twice (in VLC), alternating between the 2 audio/subtitle tracks, to see if there's any noticeable artefacts. There's a blank chapter at the end of the file, but it doesn't seem like any content is missing from the episode. The same goes for all other episodes from the rip - they've all got the same blank chapter at the end. Other than that, playback seemed perfect.

• Transcoding episode 4 using Handbrake (it didn't give me any errors)

• Watching Handbrake's transcode (in VLC), to see if there's any noticeable artefacts. I noticed that (according to VLC) Handbrake's transcode has 3 extra seconds at the end, and lacks the blank chapter at the end - however, I can't watch the extra 3 seconds, as VLC stops playback at that point. Other than that, playback seemed perfect.

• Transcoding another episode (episode 1) using Handbrake, to see if the phantom 3 seconds would appear there too. The symptoms in episode 1 turned out to be identical to those of episode 4 (i.e. phantom 3 seconds that I can't watch).

Technical details:

• MakeMKV version: 1.14.5

• MakeMKV distribution: the Flatpak provided by Flathub

• Disc product code: MBR7128A

Can anyone enlighten me as to whether these messages, and these phantom chapter / phantom 3 second issues, are something I should be worried about?

[Woodstock]

A Lull in the Sea should be handled with no issues by MakeMKV; I ripped the original pressing 4 years ago.

The fact that MakeMKV didn't fail the read indicates that it eventually did get a correct read on the sector. MakeMKV won't save the title if the result doesn't match the hash information loaded earlier.

[Blu-Shield]

Great to know. Thanks!