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8th September 2008, 04:21 | #1 | Link |
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How do I restore aspect ratio info that was lost during ripping?
I ripped a dvd (using DVDfab5) and noticed only after i converted it to x264 (using Automkv) that the original VOB's (as well as the final mkv) played at a strange aspect ratio, like a tall widescreen, instead of its original 1.78. AutoMKV tells me the ratio is 1.541284.
Is there some way to restore the correct AR to the original VOB's or the final MKV? Is AR part of the video itself, or is it like metadata info that just tells the player what AR to play at? |
8th September 2008, 16:52 | #6 | Link |
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Ive played it on zplayer, vlc, and mplayer, and they all show the native AR as being 1.5. automkv is telling me the AR is 1.5 too.
So maybe it was originally 1.5, though the image lookes stretched if i dont set it to 1.78 and its says 16:9 on the dvd box, so how do i change the AR to 1.78? |
10th September 2008, 17:19 | #10 | Link |
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well, actually the original VOB's i ripped from the dvd came out to be 1.5, but it says on the box 1.78, and no matter what i do it always remains 1.5, which is odd because i thought DVD had to either be 1.78 or 1.3, so what the hell is 1.5 anyways? Maybe this DVD was coded for the moon where people watch movies on 1.5 screens.
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10th September 2008, 21:28 | #11 | Link |
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All NTSC DVD's have a "native" resolution of 1.5:1 (720 x 480) and use AR signalling to display properly. Something with your ripping procedure may have removed the signaling. One option would be to re-rip the disk with another application and re-encode it as before.
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10th September 2008, 23:43 | #12 | Link |
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Hmm yes ok but ... but why re-encoding it all when you can simply redo the muxing with a more correct AR tag?
I know that the OP already tried to do it and seems like he didn't succeed ... and that's the very reason I asked for a detailed report (like the one given by AVInaptic) which includes the info about PAR/DAR |
11th September 2008, 01:06 | #13 | Link | ||
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I used DVDfab5, there were no options other than what streams i wanted to rip, and it seems to be a pretty popular program so unless thats a common issue i cant image that it would have removed anything.
Ok, i opened up the original VOB in avinaptic and it didnt give me any info because VOB isnt supported. The next step was the uncompressed (lagarith) MKV: Quote:
Quote:
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11th September 2008, 09:23 | #14 | Link |
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Well, as you can see, both the uncompressed and the AutoMKV-obtained MKV files contain these info:
Code:
Frame aspect ratio: 3:2 = 1.5 Pixel aspect ratio: 1:1 = 1 Display aspect ratio: 3:2 = 1.5 I'm not saying that this is a bug (though it could be): rather, I think that "anamorphic" and "Force 16:9" don't go together very well... but it's only a suspicion, since I don't know anything about AutoMKV. Anyway, as I said in the previous post, there's a very simple solution to the issue without re-encoding (but I suggest you look for a way to do it correctly into AutoMKV in the first place): simply use MKVMerge - using the GUI is preferable - like this: 1) add your AutoMKV-produced MKV file into MKVmerge ("add" button); 2) select the video track from the middle part of the maim window; 3) select the "format specific options" in the section just below; 4) select "16:9" from the "aspect ratio" drop down menu (or simply type it into the text field). 5) remember to change the output file name in the bottom part of the window! MKVMergeGUI (at least up to v2.2.0) by default set it as the main part of the file name + the MKV extension ... so, if you're remuxing/modifying an existing MKV file, you risk to overwrite the original one. |
11th September 2008, 18:11 | #15 | Link | |
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Well, i did the mkvtoolnix 16:9 remux and here is what avinaptic is telling me:
Quote:
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11th September 2008, 18:53 | #16 | Link |
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Yep, now the file *is* correct ... it's your configuration of Zoom Player and mplayer that is not !
BTW, are you talking about "command line mplayer" or Windows Media Player o Media Player Classic, btw? 'cause mplayer usually doesn't need custom config to play an anamorphic encode ... ). |
12th September 2008, 02:33 | #17 | Link |
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mplayer classic, the one that comes with quicktime alternative.
I dont know, just going to burn to disc and see if it works. I'm tired of fighting technology. edit: noticed something strange: i loaded the original DVD up in zoomplayer and moved foward frame by frame, then i loaded the x264 rip up in media player classic and checked the frame at the same spot and it was different. I loaded the same x264 into zoomplayer and it was identical to the DVD. Media player classic must be majorly F'd up. Anyways, zoom read the AR of the DVD perfect, but it still requires me to set it manually to 16:9 for the x264. *sigh* Last edited by Poof; 12th September 2008 at 03:40. |
12th September 2008, 09:50 | #18 | Link |
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I'd like to help you further, but i never used ZoomPlayer.
And usually, many issue of MPC comes from misconfiguration more than from bugs. MPC is very tunable, but this means that you have to understand very well what you're doing, when configuring it .. |
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