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Some VOB's not displaying the correct aspect ratio
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Browncoat
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Joined: 20 Sep 2004
Location: Australia / Newcastle
Post Posted: Mar 03, 2009 22:24 Posts Comp View users profile Send private message Reply with quote
I am in the process of ripping my all DVD series onto my hdds as VOB's for streaming to PS3. I have completed stacks and stacks already but have encountered an issue with BSG S2 D1.. the disk plays normally on the PS3 but when I rip the VOB for each episode onto hdd it plays widescreen with black bars top and bottom streching it way more than it should.. The ripped VOBs play too streched on PC (VLC Media player) and streamed to my widescreen through the PS3. This is the only disk I have found that does this.

Any Ideas as to why this would be happening??

guns1inger
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Joined: 01 Apr 2004
Location: Miskatonic U
Post Posted: Mar 03, 2009 23:19 Posts Comp View users profile Send private message Reply with quote
There are two places on a DVD that the Aspect Ratio can be set. The IFO files is one, the VOB stream is the other. Some DVDs are authored with just the IFO being used to flag AR, and for many players that is enough. However when you pull the VOB out and watch it in isolation, you no longer have the correct AR information.

DVD Patcher can write the AR flag into the headers og MPG and VOB streams, which will help most players get it right.

Personally, I don't believe you should play VOB files outside of the full IFO/VOB structure. If you want to play the content, use VOB2MPG to extract it, or convert to something more suitable.
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Browncoat
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Location: Australia / Newcastle
Post Posted: Mar 04, 2009 02:16 Posts Comp View users profile Send private message Reply with quote
I actually just rename the VOB's to .mpg , works fine normally.

Why do you suggest VOB's shouldnt be played outside the full IFO/VOB structure?

Browncoat
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Joined: 20 Sep 2004
Location: Australia / Newcastle
Post Posted: Mar 04, 2009 02:28 Posts Comp View users profile Send private message Reply with quote
Just tried DVDpatcher and it says the file is already 16:9

guns1inger
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Post Posted: Mar 04, 2009 02:38 Posts Comp View users profile Send private message Reply with quote
Browncoat wrote:
I actually just rename the VOB's to .mpg , works fine normally.

Why do you suggest VOB's shouldnt be played outside the full IFO/VOB structure?


Because VOB files may contain multiple titles, or only partial titles, multiple audio tracks, subtitles and menus. These are not supported by the mpg file format, and simply changing the extension does exactly that - changes the extension. Nothing more. Some players, when expecting an true mpg file, have problems when they encounter something that is called mpg, but patently isn't. Changing file extensions like this is simply lazy.
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Browncoat
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Post Posted: Mar 04, 2009 02:39 Posts Comp View users profile Send private message Reply with quote
I just used VOB2MPG to convert it and it too turned out streched.. I really cant understand whats going on here..

guns1inger
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Post Posted: Mar 04, 2009 02:56 Posts Comp View users profile Send private message Reply with quote
Post a g-psot screenshot of the mpg file, and a small clip if you can
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Browncoat
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Post Posted: Mar 04, 2009 03:17 Posts Comp View users profile Send private message Reply with quote
Is this the screenshot you wanted?



Browncoat
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Post Posted: Mar 04, 2009 03:19 Posts Comp View users profile Send private message Reply with quote
and this is a sample of the image dimensions as displayed by VLC and streamed through the PS3 onto my HDLCD

vlc%20bsg%20sample.png

guns1inger
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Joined: 01 Apr 2004
Location: Miskatonic U
Post Posted: Mar 04, 2009 03:21 Posts Comp View users profile Send private message Reply with quote
What streaming software are you using ?

edit : Just opened the screenshot. VLC is displaying the clip too wide. That image should be 1024 x 576. If that is going through to your TV at those dimensions then you must be getting black bars as well.
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Browncoat
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Post Posted: Mar 04, 2009 03:29 Posts Comp View users profile Send private message Reply with quote
Tversity.

Heya Guns1inger, in my opening post I mention the black bars. This is the whole problem. The question is why is this one disk displaying this way when ripped to my drive when all the other disks dont?

guns1inger
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Post Posted: Mar 04, 2009 03:33 Posts Comp View users profile Send private message Reply with quote
Don't know, but I gave up on TVersity for PS3 streaming and switched to PS3 Media Streamer. It isn't as pretty as TVersity (which wasn't that great to look at anyway), but for me it does a much better job.

I would suggest you give it a try.
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Browncoat
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Post Posted: Mar 04, 2009 03:41 Posts Comp View users profile Send private message Reply with quote
I have no problems with tversity. I dont believe tversity to be the issure here anyway as the video is displaying incorrectly on pc through vlc as well as when streamed.

One thing I just found is, I did a gspot comparison between the incorrectly displayed file and a good one and there is a section where it says "seq ext 540x576" by comparison the good file is blank in the "seq ext" section does this mean anything?

Browncoat
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Post Posted: Mar 04, 2009 03:43 Posts Comp View users profile Send private message Reply with quote
Is this the best section for this post? Might the question be more relevant elsewhere?

Browncoat
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Post Posted: Mar 04, 2009 04:12 Posts Comp View users profile Send private message Reply with quote
Come on Gunny! dont give up! I need this sorted smile.gif

I just found using mediainfo that its saying "display aspect ratio of 2.35:1

Have a look, is this something? Doesnt make sense to me.



guns1inger
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Post Posted: Mar 04, 2009 04:17 Posts Comp View users profile Send private message Reply with quote
That is extremely abnormal. Technically, DVD supports 4:3 and 16:9, and mpeg-2 supports 4:3, 16:9 and 2.21 : 1. 2.35 is a film aspect ratio that is not supported directly be either format.

I would go back to DVD Patcher. Ignore that it says everything is OK, and make it update the entire stream, not just the header. Then open it in MediaInfo again.

Something is very odd. Why does g-spot conflict with mediainfo ?
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Browncoat
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Post Posted: Mar 04, 2009 04:23 Posts Comp View users profile Send private message Reply with quote
I did ignore what DVD Patcher said and updated the entire stream but it was still just the same.

This is a better screencap of the bad file, I will follow it with a good file for direct comparison



Browncoat
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Joined: 20 Sep 2004
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Post Posted: Mar 04, 2009 04:24 Posts Comp View users profile Send private message Reply with quote
and a good one



Browncoat
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Post Posted: Mar 04, 2009 04:26 Posts Comp View users profile Send private message Reply with quote
Seems they started doing something differently with season 2.. I dont know why.. or how to fix. But this mediainfo data seems to show where the issue is?

Browncoat
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Joined: 20 Sep 2004
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Post Posted: Mar 04, 2009 18:13 Posts Comp View users profile Send private message Reply with quote
Help!

guns1inger
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Post Posted: Mar 04, 2009 18:29 Posts Comp View users profile Send private message Reply with quote
Using one of the mpeg-2 cutting tools, can you cut and post a small segment of the problem file. Only need a few seconds.
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Browncoat
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Post Posted: Mar 05, 2009 00:38 Posts Comp View users profile Send private message Reply with quote
I used womble mpeg-vcr to cut out a small clip and it displayed in the correct aspect!! so I just re-saved the whole file and it is all fixed.

guns1inger
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Post Posted: Mar 05, 2009 03:53 Posts Comp View users profile Send private message Reply with quote
Curiouser and curiouser. Well, at least you found a solution.
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Browncoat
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Post Posted: Mar 05, 2009 07:11 Posts Comp View users profile Send private message Reply with quote
I'd like to know what was going on? but as you say, at least I have a solution now.

Thanks for taking the time to help out.

guns1inger
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Joined: 01 Apr 2004
Location: Miskatonic U
Post Posted: Mar 05, 2009 16:12 Posts Comp View users profile Send private message Reply with quote
Womble will have done the same thing that DVD Patcher was supposed to have done - re-write the DAR flags in the stream to 16:9. I know that Womble can do this, but the question is why was it able to succeed and DVD Patcher failed ?

The only major difference in the process between the two programs is that DVD Patcher patches the original file, while Womble will have created a new file. If DVD Patcher was unable to update the source because it was read-only, for example, it should have said so.
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twistedring
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Joined: 19 Mar 2009
Location: United States
Post Posted: Mar 19, 2009 22:54 Posts Comp View users profile Send private message Reply with quote
I have had a similar problem with Dexter Season 1. I found that while DVD Patcher was reporting 16x9, it was not displaying properly with VLC or when streaming to the PS3 (squished vertically with black bars on the top and bottom). I used DVD Patcher to PATCH THE ENTIRE VOB TO 4:3 and now it works!!! I now get the correct 16x9 aspect ratio when playing in both VLC and when streaming. Try using DVD Patcher to change the aspect ratio to 4:3 (patch the whole file) and see if that helps.

--TwistedRing

Alex_ander
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Joined: 12 Oct 2006
Location: Russian Federation
Post Posted: Mar 20, 2009 03:57 Posts Comp View users profile Send private message Reply with quote
Browncoat wrote:
I'd like to know what was going on?

There are 2 sources of AR data: AR for VTS content (logical data stored in ifo's), and AR of mpeg files used for authoring the DVD. Sometimes they don't coincide. E.g. if in authoring process mpeg files with different AR are used in the same VTS (by mistake), ifo AR data will be written from the first added file (title), but the VOBs will still contain mpegs with different AR's.
When you play a DVD on a standalone or open it on PC using ifo files, only data from ifo's will be used. If you just open VOBs, AR will be used from mpegs - that is where DVDPatcher partly solves the problem. To correct ifo AR data you can use e.g. DVDRemake: highlight VTS 'Program Chains' in DVD tree and change AR in 'Video/Video track attributes'. Probably it also corrects mpeg headers (like DVDPatcher) since it also modifies VOBs at this.

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