OK, I have an odd problem I have spent a lot of time trying to understand it, but I think I need the input of someone with more basic knowledge than me.
The subject was touched upon here some time ago:
http://forum.videohelp.com/threads/338483-Aspect-ratio-problems-please-help!
And although the original poster obtained a resolution, I dont think that the basic problem was answered.
I have a number of DVDs of BBC TV programmes. And they are all 2000 era programmes and therefore would be expected to play at 16:9 and indeed do play at 16:9 on a normal DVD player or media player.
When I open the title in WinXDVD Platinum, it recognises that the title is 16:9, however when I rip them using the full title copy mode, they output file is 2.4:1.
Having done a bit of research, I can see that there is a different aspect ratio reported on the original DVD INF and VOB files:
Here is the INF file:
General
Complete name : D:\VIDEO_TS\VIDEO_TS.IFO
Format : DVD Video
Format profile : Menu
File size : 16.0 KiB
Overall bit rate mode : Variable
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
Compression mode : Lossy
And here is a VOB:
General
Complete name : D:\VIDEO_TS\VTS_02_1.VOB
Format : MPEG-PS
File size : 1 024 MiB
Duration : 19mn 7s
Overall bit rate mode : Variable
Overall bit rate : 7 485 Kbps
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=13
Duration : 19mn 7s
Bit rate mode : Variable
Bit rate : 6 568 Kbps
Maximum bit rate : 8 500 Kbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 2.40:1
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
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.633
Time code of first frame : 10:00:00:00
Time code source : Group of pictures header
Stream size : 898 MiB (88%)
Color primaries : BT.601 PAL
Transfer characteristics : BT.470 System B, BT.470 System G
Matrix coefficients : BT.601
Both are 720x576, but the aspect ratio is different.
If I force a 16:9 rip, using WinXDVD I can achieve a file which is 16:9 but its resolution is 720 x 406 pixels. I realize this must be a function of the mismatch in the aspect ratios that I am referring to, but I really do not understand what is going on.
Logically I assume that if my resultant file only has 406 lines, then I am losing quality somewhere.
Really it is a 720X576 16:9 file that I want, but perhaps that is not achievable.
I look forward to hearing from any experts.
Thank you
Malcolm
The subject was touched upon here some time ago:
http://forum.videohelp.com/threads/338483-Aspect-ratio-problems-please-help!
And although the original poster obtained a resolution, I dont think that the basic problem was answered.
I have a number of DVDs of BBC TV programmes. And they are all 2000 era programmes and therefore would be expected to play at 16:9 and indeed do play at 16:9 on a normal DVD player or media player.
When I open the title in WinXDVD Platinum, it recognises that the title is 16:9, however when I rip them using the full title copy mode, they output file is 2.4:1.
Having done a bit of research, I can see that there is a different aspect ratio reported on the original DVD INF and VOB files:
Here is the INF file:
General
Complete name : D:\VIDEO_TS\VIDEO_TS.IFO
Format : DVD Video
Format profile : Menu
File size : 16.0 KiB
Overall bit rate mode : Variable
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
Compression mode : Lossy
And here is a VOB:
General
Complete name : D:\VIDEO_TS\VTS_02_1.VOB
Format : MPEG-PS
File size : 1 024 MiB
Duration : 19mn 7s
Overall bit rate mode : Variable
Overall bit rate : 7 485 Kbps
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=13
Duration : 19mn 7s
Bit rate mode : Variable
Bit rate : 6 568 Kbps
Maximum bit rate : 8 500 Kbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 2.40:1
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
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.633
Time code of first frame : 10:00:00:00
Time code source : Group of pictures header
Stream size : 898 MiB (88%)
Color primaries : BT.601 PAL
Transfer characteristics : BT.470 System B, BT.470 System G
Matrix coefficients : BT.601
Both are 720x576, but the aspect ratio is different.
If I force a 16:9 rip, using WinXDVD I can achieve a file which is 16:9 but its resolution is 720 x 406 pixels. I realize this must be a function of the mismatch in the aspect ratios that I am referring to, but I really do not understand what is going on.
Logically I assume that if my resultant file only has 406 lines, then I am losing quality somewhere.
Really it is a 720X576 16:9 file that I want, but perhaps that is not achievable.
I look forward to hearing from any experts.
Thank you
Malcolm