Aspect Ratio?: MKV -> XviD

[Randm]

converting MKV to XviD...

-original ratio: 2.35
-MKV ratio: 2.42

-XviD ratio: 2.35 OR 2.40?

[jagabo]

Depends on whether or not there are black borders in the MKV to fill out the difference between 2.35 and 2.42 or if the video was just stretched to fill the frame.

[poisondeathray]

Also depends what the source was (the actual source, not the mkv). You rarely get exact 2.35 active image area on blu-ray, and usually you use mod16 so the mkv is a bit off as well

[jagabo]

I would just find something spherical, or some other known shape, and measure it. On the other hand, you probably won't notice a 3 percent AR error anyway.

[Randm]

Depends on whether or not there are black borders in the MKV to fill out the difference between 2.35 and 2.42 or if the video was just stretched to fill the frame.

i'm not quite sure how it was done, my buddy helped me cuz i only know xvid stuff...i know we autocropped the video black bars to make the MKV, but we had to rush through the rest & somehow ended up with 2.42...?

when i take a screenshot of the MKV, it shows without black bars, 1280x528

i have xvid4psp, would it help if i checked the MKV with Media Info or MKV Info tools? i would have from the start, but it takes some time to transfer such a big file back to my HD ...

[Randm]

XviD4PSP's Media Info tool

General
Count                            : 214
Count of stream of this kind     : 1
Kind of stream                   : General
StreamKindID                     : 0
Count of video streams           : 1
Count of audio streams           : 1
Video_Format_List                : AVC
Video_Format_WithHint_List       : AVC
Codecs Video                     : AVC
Video_Language_List              : English
Audio_Format_List                : AC-3
Audio_Format_WithHint_List       : AC-3
Audio codecs                     : AC3
Audio_Language_List              : English
Complete name                    : C:\Documents and Settings\All Users\Desktop\2009\720p\TEST720P.mkv
Folder name                      : C:\Documents and Settings\All Users\Desktop\2009\720p
File name                        : TEST720P
File extension                   : mkv
Format                           : Matroska
Format                           : Matroska
Format/Url                       : http://packs.matroska.org/
Format/Extensions                : mkv mka mks
Codec                            : Matroska
Codec                            : Matroska
Codec/Url                        : http://packs.matroska.org/
Codec/Extensions                 : mkv mka mks
File size                        : 6992632487
File size                        : 6.51 GiB
File size                        : 7 GiB
File size                        : 6.5 GiB
File size                        : 6.51 GiB
File size                        : 6.512 GiB
Duration                         : 8610825.000
Duration                         : 2h 23mn
Duration                         : 2h 23mn 30s 825ms
Duration                         : 2h 23mn
Duration                         : 02:23:30.825
Overal bit rate                  : 6496597
Overal bit rate                  : 6497 Kbps
Encoded date                     : UTC 2007-10-27 17:39:22
File creation date               : UTC 2009-05-04 15:56:50.359
File last modification date      : UTC 2007-10-27 22:42:55.546
Writing application              : mkvmerge v2.0.2 ('You're My Flame') built on Feb 21 2007 23:40:55
Writing library                  : libebml v0.7.7 + libmatroska v0.8.1

Video
Count                            : 119
Count of stream of this kind     : 1
Kind of stream                   : Video
StreamKindID                     : 0
ID                               : 1
UniqueID                         : 1
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format/Url                       : http://developers.videolan.org/x264.html
Format profile                   : High@L5.1
Format settings                  : CABAC / 8 Ref Frames
Format settings, CABAC           : Yes
Format settings, ReFrames        : 8
Codec ID                         : V_MPEG4/ISO/AVC
Codec ID/Url                     : http://ffdshow.sourceforge.net/tikiwiki/tiki-index.php?page=Getting+ffdshow
Codec                            : V_MPEG4/ISO/AVC
Codec                            : AVC
Codec/Family                     : AVC
Codec/Info                       : Advanced Video Codec
Codec/Url                        : http://ffdshow.sourceforge.net/tikiwiki/tiki-index.php?page=Getting+ffdshow
Codec profile                    : High@L5.1
Codec settings                   : CABAC / 8 Ref Frames
Codec settings, CABAC            : Yes
Codec_Settings_RefFrames         : 8
Duration                         : 8602208
Duration                         : 2h 23mn
Duration                         : 2h 23mn 22s 208ms
Duration                         : 2h 23mn
Duration                         : 02:23:22.208
Bit rate                         : 5590472
Bit rate                         : 5590 Kbps
Nominal bit rate                 : 5853000
Nominal bit rate                 : 5853 Kbps
Width                            : 1280
Width                            : 1280 pixels
Height                           : 528
Height                           : 528 pixels
Pixel Aspect Ratio               : 1.000
Display aspect ratio             : 2.424
Display aspect ratio             : 2.424
Frame rate                       : 23.976
Frame rate                       : 23.976 fps
FrameCount                       : 206453
Colorimetry                      : 4:2:0
Scan type                        : Progressive
Scan type                        : Progressive
Interlacement                    : PPF
Interlacement                    : Progressive
Bits/(Pixel*Frame)               : 0.361
Writing library                  : x264 - core 56 svn-680
Writing library                  : x264 - core 56 svn-680
Encoding settings                : cabac=1 / ref=5 / deblock=1:-3:-2 / analyse=0x1:0 / me=umh / subme=7 / brdo=1 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=0 / cqm=2 / deadzone=21,11 / chroma_qp_offset=0 / threads=4 / nr=0 / decimate=1 / mbaff=0 / bframes=3 / b_pyramid=1 / b_adapt=1 / b_bias=0 / direct=1 / wpredb=1 / bime=1 / keyint=250 / keyint_min=25 / scenecut=40(pre) / rc=2pass / bitrate=5853 / ratetol=1.0 / rceq='blurCplx^(1-qComp)' / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / pb_ratio=1.30
Language                         : eng
Language                         : English

Audio
Count                            : 102
Count of stream of this kind     : 1
Kind of stream                   : Audio
StreamKindID                     : 0
ID                               : 2
UniqueID                         : 788999819
Format                           : AC-3
Format/Info                      : Audio Coding 3
Codec ID                         : A_AC3
Codec                            : AC3
Codec                            : AC3
Duration                         : 8610825
Duration                         : 2h 23mn
Duration                         : 2h 23mn 30s 825ms
Duration                         : 2h 23mn
Duration                         : 02:23:30.825
Bit rate mode                    : CBR
Bit rate                         : 640000
Bit rate                         : 640 Kbps
Channel(s)                       : 6
Channel(s)                       : 6 channels
Channel positions                : Front: L C R, Rear: L R, LFE
Sampling rate                    : 48000
Sampling rate                    : 48.0 KHz
SamplingCount                    : 413319600
Language                         : eng
Language                         : English

[Randm]

XviD4PSP's MKV Info tool

+ EBML head
|+ Doc type: matroska
|+ Doc type version: 1
|+ Doc type read version: 1
+ Segment, size 6992632451
|+ Seek head (subentries will be skipped)
|+ EbmlVoid (size: 4025)
|+ Segment information
| + Timecode scale: 1000000
| + Muxing application: libebml v0.7.7 + libmatroska v0.8.1
| + Writing application: mkvmerge v2.0.2 ('You're My Flame') built on Feb 21 2007 23:40:55
| + Duration: 8610.825s (02:23:30.825)
| + Date: Sat Oct 27 17:39:22 2007 UTC
| + Segment UID: 0x96 0x2e 0x3b 0xc8 0xf2 0x45 0x36 0x17 0x9f 0xf3 0xb6 0xc8 0xba 0x57 0x63 0xbb
|+ Segment tracks
| + A track
|  + Track number: 1
|  + Track UID: 1
|  + Track type: video
|  + Enabled: 1
|  + Default flag: 1
|  + Forced flag: 0
|  + Lacing flag: 0
|  + MinCache: 1
|  + Timecode scale: 1
|  + Max BlockAddition ID: 0
|  + Codec ID: V_MPEG4/ISO/AVC
|  + Codec decode all: 1
|  + CodecPrivate, length 68
|  + Default duration: 41.708ms (23.976 fps for a video track)
|  + Language: eng
|  + Video track
|   + Pixel width: 1280
|   + Pixel height: 528
|   + Interlaced: 0
|   + Display width: 80
|   + Display height: 33
| + A track
|  + Track number: 2
|  + Track UID: 788999819
|  + Track type: audio
|  + Enabled: 1
|  + Default flag: 1
|  + Forced flag: 0
|  + Lacing flag: 1
|  + MinCache: 0
|  + Timecode scale: 1
|  + Max BlockAddition ID: 0
|  + Codec ID: A_AC3
|  + Codec decode all: 1
|  + Default duration: 32.000ms (31.250 fps for a video track)
|  + Language: eng
|  + Audio track
|   + Sampling frequency: 48000
|   + Channels: 6
|+ EbmlVoid (size: 1024)
|+ Cluster

[jagabo]

Without actually seeing the video, and a section with something of identifiable aspect ratio, or the original video for comparison, there's no way of saying how you should handle it. Even if there are no black borders encoded into the frame it's possible that a little of the picture was cropped in order to maintain the proper aspect ratio of the source within the 1280x528 frame.

You are simply going to have to eyeball it. And if you can't tell which is right, then it doesn't matter, does it?!

[Randm]

Without actually seeing the video, and a section with something of identifiable aspect ratio, or the original video for comparison, there's no way of saying how you should handle it. Even if there are no black borders encoded into the frame it's possible that a little of the picture was cropped in order to maintain the proper aspect ratio of the source within the 1280x528 frame.

You are simply going to have to eyeball it. And if you can't tell which is right, then it doesn't matter, does it?!

true hehe, i see...i guess i'll just redo the mkv properly when i get it back from my brother...until then, i'll just run an xvid at 2.4 since my input.MKV is 2.4...thanx for the info bud...

[Randm]

btw, since the source is so sharp and nice already, is there any point in using any denoise/sharpening or brightness/contrast settings with my conversion to xvid?