Some DVDs "fast forward" part of the time

I have a bunch of DVD’s I’ve recorded with a digital camcorder (Canon DC50). I converted them to ISO-files and thought that everything would go smooth. It didn’t.

Some parts of the recorded material are fast forwarded, I cannot use the DVD menu and some chapters are missing. If I play the files using the computer (with Kaffeine or MPlayer), everything works great. What could the problem be? I’ve never had any problems with any other files.

System firmware: 1.06.15_V

File info:

tree /media/

/media/
├── DCIM
│   └── 101CANON
│       ├── PIC_0101.JPG
│       ├── PIC_0102.JPG
│       └── PIC_0103.JPG
└── VIDEO_TS
    ├── VIDEO_TS.BUP
    ├── VIDEO_TS.IFO
    ├── VIDEO_TS.VOB
    ├── VTS_01_0.BUP
    ├── VTS_01_0.IFO
    ├── VTS_01_1.VOB
    ├── VTS_02_0.BUP
    ├── VTS_02_0.IFO
    ├── VTS_02_1.VOB
    ├── VTS_03_0.BUP
    ├── VTS_03_0.IFO
    └── VTS_03_1.VOB

mediainfo /media/VIDEO_TS/*

General
Complete name : /media/VIDEO_TS/VIDEO_TS.BUP
Format : DVD Video
Format profile : Menu
File size : 16.0 KiB

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Bit rate mode : Variable
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 4:3
Frame rate : 25.000 fps
Standard : PAL

Text
Format : RLE
Format/Info : Run-length encoding
Bit depth : 2 bits

General
Complete name : /media/VIDEO_TS/VIDEO_TS.IFO
Format : DVD Video
Format profile : Menu
File size : 16.0 KiB

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Bit rate mode : Variable
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 4:3
Frame rate : 25.000 fps
Standard : PAL

Text
Format : RLE
Format/Info : Run-length encoding
Bit depth : 2 bits

General
Complete name : /media/VIDEO_TS/VIDEO_TS.VOB
Format : MPEG-PS
File size : 438 KiB

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : No
Format settings, Matrix : Default
Format settings, GOP : N=1
Bit rate mode : Variable
Bit rate : 9 400 Kbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 4:3
Frame rate : 25.000 fps
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Scan order : Top Field First
Bits/(Pixel*Frame) : 0.907

Text
ID : 32 (0x20)
Format : RLE
Format/Info : Run-length encoding

Menu

General
Complete name : /media/VIDEO_TS/VTS_01_0.BUP
Format : DVD Video
Format profile : Program
File size : 16.0 KiB

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Bit rate mode : Variable
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Standard : PAL

Audio
ID : 128 (0x80)
Format : AC-3
Format/Info : Audio Coding 3
Channel(s) : 2 channels
Sampling rate : 48.0 KHz

Menu
List (Audio) : 0

General
Complete name : /media/VIDEO_TS/VTS_01_0.IFO
Format : DVD Video
Format profile : Program
File size : 16.0 KiB

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Bit rate mode : Variable
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Standard : PAL

Audio
ID : 128 (0x80)
Format : AC-3
Format/Info : Audio Coding 3
Channel(s) : 2 channels
Sampling rate : 48.0 KHz

Menu
List (Audio) : 0

General
Complete name : /media/VIDEO_TS/VTS_01_1.VOB
Format : MPEG-PS
File size : 344 MiB

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : Yes
Format settings, Matrix : Default
Format settings, GOP : M=3, N=12
Bit rate mode : Variable
Bit rate : 9 400 Kbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Bits/(Pixel*Frame) : 0.907

Audio
ID : 128 (0x80)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Bit rate mode : Constant
Bit rate : 256 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Video delay : -80ms

Menu

General
Complete name : /media/VIDEO_TS/VTS_02_0.BUP
Format : DVD Video
Format profile : Program
File size : 24.0 KiB

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Bit rate mode : Variable
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Standard : PAL

Audio
ID : 128 (0x80)
Format : AC-3
Format/Info : Audio Coding 3
Channel(s) : 2 channels
Sampling rate : 48.0 KHz

Menu
List (Audio) : 0

General
Complete name : /media/VIDEO_TS/VTS_02_0.IFO
Format : DVD Video
Format profile : Program
File size : 24.0 KiB

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Bit rate mode : Variable
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Standard : PAL

Audio
ID : 128 (0x80)
Format : AC-3
Format/Info : Audio Coding 3
Channel(s) : 2 channels
Sampling rate : 48.0 KHz

Menu
List (Audio) : 0

General
Complete name : /media/VIDEO_TS/VTS_02_1.VOB
Format : MPEG-PS
File size : 669 MiB

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : Yes
Format settings, Matrix : Default
Format settings, GOP : M=3, N=12
Bit rate mode : Variable
Bit rate : 9 400 Kbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Bits/(Pixel*Frame) : 0.907

Audio
ID : 128 (0x80)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Bit rate mode : Constant
Bit rate : 256 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Video delay : -80ms

Menu

General
Complete name : /media/VIDEO_TS/VTS_03_0.BUP
Format : DVD Video
Format profile : Program
File size : 16.0 KiB

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Bit rate mode : Variable
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Standard : PAL

Audio
ID : 128 (0x80)
Format : AC-3
Format/Info : Audio Coding 3
Channel(s) : 2 channels
Sampling rate : 48.0 KHz

Menu
List (Audio) : 0

General
Complete name : /media/VIDEO_TS/VTS_03_0.IFO
Format : DVD Video
Format profile : Program
File size : 16.0 KiB

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Bit rate mode : Variable
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Standard : PAL

Audio
ID : 128 (0x80)
Format : AC-3
Format/Info : Audio Coding 3
Channel(s) : 2 channels
Sampling rate : 48.0 KHz

Menu
List (Audio) : 0

General
Complete name : /media/VIDEO_TS/VTS_03_1.VOB
Format : MPEG-PS
File size : 344 MiB

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : Yes
Format settings, Matrix : Default
Format settings, GOP : M=3, N=12
Bit rate mode : Variable
Bit rate : 9 400 Kbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Bits/(Pixel*Frame) : 0.907

Audio
ID : 128 (0x80)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Bit rate mode : Constant
Bit rate : 256 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Video delay : -80ms

Menu

It looks like no one here have an idea why this is happening, have you tried WD Tech support?