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  1. Member DJRumpy's Avatar
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    No worries. The guide thread won't interfere. I've posted a reply to your forum post.
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  2. Hi DjRumpy !

    Iam sure the guide is very good,but iam struggle to understand it ,maybe becouse of lack in my english.
    Would u please give a simpe examples to this post?
    I mean just the math without explanations....i think a lot of people will apreciate that....for example :

    If i have Source Video 640x480 25 FPS (1.33 Full Screen)
    and i want leave it PAL.
    In virtual dub,while frameserv, what New Width and New Heght i need to enter ?
    Also what is new Frame Width and New Frame height i should to use?

    And for NTSC example lets say source is 640x272 29 FPS (2.35 Aspect)
    same ,what the new widths and heights we need to enter when resize and frameserv with VDub.

    Please show us just how u do for those 2 examples the math !!!!Please !
    With those examples i hope more people will understand how to resize ,they will just put instead of those numbers the resolution numbers of their own source video and do the math !

    Thank you for any help !!!
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  3. Member DJRumpy's Avatar
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    If your converting to DVD, and your source is 1.33, then you simply resize to 720x576 if your source is (pal), or 720x480 (ntsc). Use the table at the bottom of the guide, looking for the format you want to convert TO (DVD for example), and then look for the aspect ratio of your movie (1.333). Each entry lists a valid resolution you can resize to (for instance, the 1.333 video lists 3 resoutions you can resize to).

    For 1.333 video:
    720x480
    704x480
    352x480


    You also asked about 2.35 video. Looking at the table, I can see that for that ratio, I can choose 2 ratios ( the last option is only if you own a widescreen TV, and you want a widescreen picture using Half-D1 resolutions):

    For 2.35 video:
    720x360
    704x360
    352x460 ( set aspect to 4:3 on mpeg [widescreen tv's only])


    You could resize to either 720x360, or 704x360, and then add letterboxing to fill out the 360 vertical to a proper 480.

    If your working with PAL, then just multiply these numbers by 1.2 ( 360*1.2 = 432) to get the proper PAL vertical resolution. If your movie is a 2.35:1 aspect (PAL), and you want to resize it to fit onto a DVD, you would resize it to 720x432 (360*1.2=432), and add letterboxing to the 432 vertical height of your video to the PAL vertical of 576.
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  4. Damn....iam forgot to say that i was converting to SVCD
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  5. Member DJRumpy's Avatar
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    Almost the same answer, just use the SVCD part of the table:
    CVD/SVCD:

    For 1.333 video:
    480x480
    352x480
    For 1.77 video:
    480x360
    352x360
    For 1.85 video:
    480x348
    352x348
    For 2.35 video:
    480x272
    352x272

    SVCD / CVD supports two different resolutions. 352x480 and 480x480. If your player supports one, chances are it supports the other. Just pick the aspect ratio, and then the resolution you want. For example, a 2.53 video, can be resized to 480x272, with letterboxing added to the vertical (272) to fill it out to 480, or you could make a CVD, resizing to 352x272, with letterboxing filling out the 272 vertical to 480. As usual, 1.33 video has no letterboxing. You would just resize it to 480x480 (svcd) or 352x480 (cvd).
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  6. Ok ,allow me to intriduce what i have understand till now.

    I will Use VDub and CCE v2.5
    and some settings for DvD2SVCD also

    I have that weird avi file that is 544x304 resolution 25 FPS
    so i devide it to get aspect ratio
    544/304=1.7894
    So aspect ratio is 1.77

    Then i do this calculations for this PAL avi :

    Heght=((720/X)xY)/(54/59)

    where X is Width and Y is Hight of my source AVI

    i do (54/59) becouse its PAL, for NTSC i will do (11/10)

    H=((720/544)x304)/(0.91525)
    H=439.609
    For better results MMX, number should be divided by 4 so i will use
    H=440

    Ok, so from now on i can use VDub for FrameServ and add those :
    New Width = 480
    New Height = 440

    Check "Expand Frame And Letter Box Image"

    New Frame Width = 480
    New Frame Height = 576 (since i work with PAL)

    And let the CCE FrameServ.Then The rest is known.

    For DVD2SVCD i use a little bit different settings .
    What i do is that i manually edit AviSynth script.
    So i need to add borders manually.

    When edit the AviScript i use this formula
    Added Borders = (576-H)/2
    AB=(576-440)/2
    AB=68
    So in script i use :
    ResizeBicubic(480,440)
    AddedBorders(0,68,0,68)

    Then i let the DVD2SVCD finish the work.

    Basicly i do this math for NTSC movies also
    but resulution instead of (480x576) is (480x480)
    and u use (11/10) instead of (54/59)


    ALso for full screen avis if its PAL i just resize it to (480x576) without any borders added and expanding letter box
    and for full screen NTCS i just resize it to (480x480) without any borders added.

    Dj Rumpy fix me if iam wrong somewhere and if there is nothing to fix i hope this will help many confused people ! ))
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  7. Member DJRumpy's Avatar
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    I'm not sure why your going through all of those gyrations. I'm assuming your source file is AVI? Remember that all of the calculations are based off of NTSC aspect ratios, so you must convert the vertical to NTSC, and then do the math.
    Heght=((720/X)xY)/(54/59)
    I have no idea what this is supposed to be, or why your using it . If your source is PAL, and your converting from AVI to MPEG, then you simply divide the AVI vertical by .8334 to convert to NTSC vertical. This is how we figure out which Aspect ratio it uses (we'll convert it back to PAL when were ready).


    Movie Source resolution: 544x304

    304 * .8334 = 253 NTSC vertical

    This movie would most likely be a 2.35:1, not a 1.77:1. A vertical of 253 is pretty far off from 272, so it's possible someone resized the AVI incorrectly, or they resized the AVI to NTSC, but didn't convert the framerate. I've hit a few like that off the web. Does your AVI look tall, or short in any way? Anyway...

    A 2.35 movie correlates to a vertical height of 272 (see the table). We take that 272 vertical, and convert back to PAL to get our SVCD vertical PAL resolution: 272 * 1.2 = 324 (rounded to the nearest 4). The rest would be filled with letterboxing ( 576 PAL vertical - 324 movie area = 252 Letterboxing )

    252 / 2 = 126 Top Letterbox + 126 Bottom Letterbox.

    Would anyone find it usefull if I also included the PAL vertical resolutions in the table, so none of the additional conversion math was necessary?
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  8. Member vhelp's Avatar
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    Hey DJRumpy.. pal

    When you get the time..

    I've got something that's bothering me something terible.. Shooting with a
    DV CAM in 16:9 aspect ratio (AR)

    My issue is what exactly is the AR ?? ..is it
    * 1.778
    * 1.85
    * 2.35
    * or some odd number ??

    Right now, I'm experimenting for the hundreth time, but I'd like to know
    w/out a doubt, what the AR is for these so called, "faked" 16:9 video from
    DV cams.

    Just so you know, I have a Sony TRV22, and it's a great cam, even in low
    light, though I'm not saying it superb in it, but its better then the TRV19's
    and TRV33's !!
    Plus, you gotta apprecitae it's mini progressive mode. Can't beet a great
    deinterlacer, w/ full field appreciation too :P

    Please, help us DV guys out , unless you're not up to DV yet hehe :P

    Thanks a bunch,
    -vhelp
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  9. Member DJRumpy's Avatar
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    What resolution is the output, and does it include any letterboxing?
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  10. Member DJRumpy's Avatar
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    I've updated the tables to hopefully be a bit more readable.
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  11. Member vhelp's Avatar
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    Evening guys.

    @ DJRumpy..

    What resolution is the output, and does it include any letterboxing?
    My resolutoin of my DV captures (transfers) are 720x480.

    Some notes on my actual footage when taking Interlaced video through my lens..

    * Output: 720x480
    * Mode: 16x9 (this is "faked", where they squish/compress the image)
    * Boarders: none. There are no black bars at all.. only video, x480 worth.

    Some more notes...
    When feeding directly to TV (RCA plugs) the video looks a tad fat.
    But, there is some noticable distortion during this compressing of the video to
    "fake" the 16x9 Aspect, but when encoded using 16:9, output looks perfect.

    Right now, I'm experimenting on the various different ways to encodes (TMPG)
    w/ 16:9 output for DV video home footage.
    In TMPG's Source Aspect Ratio, the tricky part is working out the best
    Aspect Ratio selection for DV source.. ie below:

    * 4:3 525 Line
    * 4:3 525 Line (NTSC 704x480) ...I've used this one sometimes
    * 16:9 525 Line (NTSC)
    * 4:3 Display
    * 16:9 Display
    * 2.11:1 Display

    And then the Video Arrange Method:

    * Center Custom size ... I've used this w/ a value of 704 x 400 for DV
    * Full Screen
    * Full Screen (keep aspect ratio)
    * Full Screen (keep aspect ratio 2)

    My ultimate goal is for future plan on a WS tv set.. but for the time being,
    I'd like to encode my DV correctly, for both normal 4:3 TV (ie, my 13" tv) and also for WideScreen tv's (when I do finally get one)

    Any help from your methods would greatly be appreciated from us DV camcorder
    users/fans. Hopefully, you've got one by now ( ..hint, TRV22 )

    Special note for those following..
    This issue of setting proper Aspect Ratios for DV is for those taking footage
    through the lens part of the DV cam in 16:9 mode.., but not w/ the feeding
    sources like VCR; Cable; or Satellite source via PASS-THROUGH features
    of those cams !!

    Thanks for any assist,
    -vhelp
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  12. Member DJRumpy's Avatar
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    If your video looks tall on a regular TV, it has no borders, then I'd say it's true 16:9 video. Since your telling me it's fullscreen, it would have to be 1.77:1 (16:9). You mentioned they look fat though, which doesn't sound right. When the video is played back, does the CAM automatically add letterboxing?

    Assuming it is true 16:9, encode your video in TMPGenc, with the source set to '16:9 Display', and your output set to Center - Keep Aspect Ratio. If your burning to DVD, the DAR settings on the MPEG don't matter much, as the IFO + your DVD settings decide how widescreen video is handled during playback. The 'Center - Keep Aspect Ratio' setting will, however, center your widescreen on your display, and resize it if necessary to fit. You could actually use Fullscreen as long as your input AVI was 720x480. The Aspect Ratio should also be set to '16:9 525 Line' on the VIDEO tab.

    With those settings, it should play back as letterboxed widescreen on a regular TV, and as fullscreen on a widescreen tv.
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  13. Member vhelp's Avatar
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    .
    .
    @ DJRumpy..

    If your burning to DVD, the DAR settings on the MPEG don't matter much, as the IFO + your DVD settings decide how widescreen video is handled during playback.
    What app are we (you) talking about on this.. as I'd like to give some actual
    DVD athoring of these DV clips ??
    I'm currently just burning w/ Nero v5.5.5.1 by checking SVCD compliancy (after
    I MUX w/ bbMPEG using SVCD or DVD specs, as either one works fine, once
    burned w/ Nero to a CDRW test disk)


    On another note...
    Ok, I just did another testing of the DV cams out to TV screen.

    On the TV, what I ment was the the image looks like someone compressed
    the scruntched the person in an elevator (left - right, squished to center)

    All image as can be seen inside DV cams viewfinder can also be seen on the
    TV screen, except for the above.

    With those settings, it should play back as letterboxed widescreen on a regular TV, and as fullscreen on a widescreen tv.
    Perfect! Superb!

    Sorry if I misslead you incorrectly in my previous post

    I'm now learning better techniques w/ my DV cam, and can almost see a
    deffinate improvements in still scenes, ..as if done by Cinema devices

    I was thinking about U/L 'ing a test sample for you to see what my TRV22
    is producing for me, and using the AR discussed above, to see if the AR is
    correct on anyone's Normal TV set, and Widescreen TV set for verification
    purposes Anyways..

    Thanks for the assist,
    -vhelp
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  14. Member DJRumpy's Avatar
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    What app are we (you) talking about on this.. as I'd like to give some actual
    DVD athoring of these DV clips ??
    I'm currently just burning w/ Nero v5.5.5.1 by checking SVCD compliancy (after
    I MUX w/ bbMPEG using SVCD or DVD specs, as either one works fine, once
    burned w/ Nero to a CDRW test disk)
    I was talking DVD authoring using SpruceUp, not SVCD, so disregard that comment.
    On the TV, what I ment was the the image looks like someone compressed
    the scruntched the person in an elevator (left - right, squished to center)
    This means their 'Tall', which also means that yes, your video is true Widescreen. It doesn't matter how it got widescreen ( some cams simply chop off some of the top and bottom image area to get it, but the end affect still produces widescreen video )

    You can certainly post a screen grab, but I'd post it in the regular forum, or mail it to me, so I can examine the aspect. From everything you've given me, it sounds like 1.77 widescreen video.
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  15. Member vhelp's Avatar
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    @ DJRumpy..

    I was talking DVD authoring using SpruceUp, not SVCD, so disregard that comment.
    Yes.. ok I gotha.

    As far as sample, yes, I'd end up posting it at my "VHELP's Samples.." thread
    anyways and point you to it

    I gotta another issue w/ 16x9 encodes though. I tried an experiement to
    see if I could get WinDVD to play my 16x9 (AR 1:77) encode, and although
    they play perfectly in 16x9 view under PowerDVD, they don't in WDVD.
    Instead, they play fullscreen almost. What I mean, is that WDVD does NOT
    stretch the window to a 16x9 view as PDVD does. So, it gives you the wrong
    impression of the video, or squished video Anyways..
    I tried make a VOB w/ DVDLab (had trouble w/ at first, but all is ok) and
    when I played my 16x9 encoded VOB file inside WDVD, I got the same result..
    incorrect viewing, but PDVD played it perfectly!!
    BUT, one point to note, when I pop in the same DVD (commercial one) and
    play them in my DVD-ROM undre PDVD and WDVD, the AR is displayed
    correctly what is the secret to this, or what gives ?? ?? ??
    I'm stumped by this 16x9 thing. I hope you understand what I'm talking
    about here

    Thanks for any input on this issue,
    -vhelp
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  16. Member DJRumpy's Avatar
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    Now your talking about a dvd mpeg, and not an SVCD mpeg correct? What image area resolution does it use, and how much letterboxing? Also, use BitViewer to see what aspect ratio is set on the MPEG.
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  17. RJdumpy,
    I have read your guide again and again and tried to apply to my situation but still got stuck.
    My goal is to preserve the original avis video resolution when encoding to DVD ( I want to avoid resizing since I think that will degrade the video quality).
    My source is 640x352 25pfs avi and i'm trying to encode to a DVD to watch on 4:3 TV. By reading your guide, here's what I think I should do in TMPG:
    1. Video source 1:1VGA, full screen (keep aspect ratio)
    2 MPEG stream: 720x480, aspect ratio 4:3.

    Since you metioned in the guide that the play back width will be 480x1.33 =640, I thought this scheme will preserve my orginal resolution (640x352 video in a 640x480 physical frame). But what about the DVD standard width of 720. What will happen with the horizontal difference 720-640??? Why do I see a full 720width when i open the resulting MPEG2 clip in VirtualDub and WMP shows a 720x540 when playing it back?
    I'm really confused. Please help.
    Thanks
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  18. Member DJRumpy's Avatar
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    Resizing an AVI of that resolution to DVD will not cause any noticable degredation in quality. You should resize it to the full width.

    If you insist on trying to keep the size as is, then you will have to add black letterboxing all around the avi to retain it 'as is', while producing a DVD compatible MPEG. What your asking for isn't really covered in my guide, which may help to explain your confusion. Since you want to retain the original resolution, then my guide serves you no purpose. Aspect ratio is irrelevant and resolution is irrelevant if you don't plan to change them during your process.

    Onto your problem. The reason your output looks wrong is because of the settings you used in TMPGenc. Try 'Center - Custom Size' instead of 'Full screen (keep aspect ratio)'. Although I don't use TMPGenc, it should give you essentially what your looking for. You should end up with letterboxing on all sides.
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  19. DJRumpy
    Thanks for the reply.
    So you're saying that encoding the 640x352 AVI to a 720x480 4:3 display WILL NOT give a 640x480 video image? The width of the video will always be streched to 720? What about the height? Will TMPG resize it to 720/(whatever the original Divx clip is, in this case 640/352) to keep the aspect ratio intact?
    I don't want to do a center clip. I just though I did something wrong and ended up with the different video size. Another funny thing is that the same version 9.0 of WMP in win2000 show 720x540 but in XP it shows 640x480. Any idea whay? What should I use to check the physical as well as image size of an MPEG2?
    Thanks again
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  20. Member DJRumpy's Avatar
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    You should definately NOT use WMP. It's support of MPEG2 in regards to accurate information is poor at best. Use 'MPEG Properties', or 'AVI Codec' (find both in the TOOLS section). They will properly report size, bitrate, etc.
    So you're saying that encoding the 640x352 AVI to a 720x480 4:3 display WILL NOT give a 640x480 video image? The width of the video will always be streched to 720? What about the height?
    I'm not sure what your asking me. Your width will be whatever you resize it to. If you resize it to 720, then your width will be 720. I have a feeling your trying to describe something else, but we're losing something in the translation. You should resize the video to it's proper height. Say it's a 2.35:1 video, and your converting it to NTSC DVD, you would convert the vertical to NTSC 360, and encode as a 16:9 video. It would be automatically letterboxed on a 4:3 television. It this was going to a 4:3 media, like SVCD, you would resize it to 480x272, and add letterboxing to fill in the remaining vertical.
    Will TMPG resize it to 720/(whatever the original Divx clip is, in this case 640/352) to keep the aspect ratio intact?
    These types of questions aren't really covered in my guide. Your asking about encoder settings for TMPGenc, which isn't covered in the guide. To answer your question, your video will be resized, according to the settings you select in TMPGEnc. Specifically the Advanced tab - Video Arrange Method setting, and the output resolution settings you select. If you select 'full screen - keep aspect ratio', then tmpgenc will resize your image until either the width or height reaches the maximum allowed resolution (720, or 480 respectively), and then fill in the remaining space with letterboxing if necessary. If you don't want letterboxing, and you want the sides chopped off, select No Margin. Some time back, I posted a detailed description of what each setting does in TMPGenc, and what output you can expect. Search the forum to find it. Just let me know if you can't seem to find it, and I'll see if I can hunt it down.
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  21. DJRumpy,
    I think I finally got a grip on this whole aspect ratio thing thanks to your post + guide. Switching to CCE also helps alot since I have to manually figure out the resizing thing myself to put in the .avs file. One final question, say I have a 640x272 avi file, resizing to 720x360 for 16:9 and 720x272 for 4:3 TV, which one will give better quality? I think 720x272 since the image will only 640 wide while palying back whereas 720x360 will be strech out to 852x360, am I right?
    Thanks again.
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  22. Member DJRumpy's Avatar
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    You probably wouldn't notice a difference on a 4:3 TV, assuming your AVI is good quality. I would suggest you do the 720x360 resize. DVD is compatible with both 4:3 displays, and 16:9 displays, so if you decide to move to widescreen later on, you won't be stuck with a video that DOES look bad on a 16:9 display.
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  23. So, according to your picture showing 60 pixels on top, if I want to make my 4:3 material anamorphic 16:9 I need to crop 60 pixels off the top and bottom? does it always have to be equal? Or can I do 58 top 62 bottom etc?
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    It doesn't have to be equal. You can crop different values, just make sure they are always in even number to avoid changing the field order. Other than that, the skies the limit. If your video is 4:3 (non widescreen), then I would simply convert it to 720x480, without cropping. I can't bare to see a movie chopped into pieces
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  25. Originally Posted by DJRumpy
    It doesn't have to be equal. You can crop different values, just make sure they are always in even number to avoid changing the field order. Other than that, the skies the limit. If your video is 4:3 (non widescreen), then I would simply convert it to 720x480, without cropping. I can't bare to see a movie chopped into pieces
    If the original material is 4:3 then wouldnt it distort on a 16:9 television unless you crop it?
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  26. Member DJRumpy's Avatar
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    No, remember in the guide, that the width of the material is irrelevant (which is why a CVD at 352x480 looks 'normal' on your television, rather than ultra tall and ultra skinny). The image from a dvd is always stretched edge to edge to the sides of your display according to the aspect ratio on the MPEG. Your video is 480 pixels high, with a 4:3 aspect ratio (1.333 decimal), so 480*1.333 = 640. Your video is resized to 640x480 on playback, wich fits your TV perfectly. Almost all 4:3 DVD's are encoded at 720x480, with a 4:3 aspect ratio. It's the proper way to do a fullscreen 4:3 DVD.

    You can convert it to widescreen, and you are correct, you would take 60 pixels from the top, and 60 from the bottom but you would then resize the cropped image to 720x480 with no letterboxing (1.77 video has no letterboxing when it's encoded as widescreen).
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  27. Member vhelp's Avatar
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    Hi DJRumpy..

    I've ben following along in silent mode for a while

    I've ben reading your responses, and am somewhat confused, despite your
    excellent guide. But, the problem is my NEW setup for my DV projects, and
    not yours

    You see, I am now back to shooting my DV footage in 4:3 mode (used to be
    in 16:9 mode, but after dealing w/ saw-tooth artifacts, I had to turn back
    around a bit, but it has turned out to be pretty good after all)

    What I do is I shoot my footage in 4:3 mode, and then later on, I convert
    the 4:3 to 16:9 for what I consider to be a very good compremise, as well
    as good quality too!!

    Ok, here is what I'm doing:

    * DV CAM... Shoot footage in 4:3 mode
    * Editing.. I crop top 60 pix and bottom 60 pix and then resize the now
    ...720x360 into 720x480.
    * Encode... Then, in TMPG, I encode to a beutiful 16:9 MPEG-2 clips.

    The above steps, if I have ben understanding your guide thus far, is a nice
    looking 1:777 AR

    However, I've now shortened this 60 pix to 64 instead, thus my new resolution
    is 720x352. When I do this, I have perfect blackness (top and bottom) which
    means, better quality all around. So my setup is now:

    * Editing.. I crop top 64 pix and bottom 64 pix and then resize the now
    ...720x352 into 720x480.
    * Encode... Then, in TMPG, I encode to a beutiful 16:9 MPEG-2 clips.

    So, I did a test to see if my converted 4:3 to 16:9 would look the same when
    played on my normal 13" TV set, and they did. I compared a 4:3, played
    it, and then a 16:9, played it, and they both looke identical on screen, only
    the the 16:9 had empty space (top/bottom black bars)

    But, the only thing that I don't know, is how it will look on an actual 16:9
    widescreen TV set

    @ DJ..
    If you have one, perhaps I could upload a small clip, and you could see
    for yourself if it works or not.
    .
    .
    Also, your wrote:
    I can't bare to see a movie chopped into pieces
    Actually, that all depends. As you were not clear what was being cropped..
    ie, TV shows/movies vs. Home Movies shoot by DV cams, as in my case.
    .
    .
    Baring in mind, the above, and why I convert 4:3 to 16:9, it doesn't matter
    what my final output is to be, ie, cropping top/bottom 64 pix and converting
    to 16:9 (aka, gutting the source) as long as it is Home Movies shot w/ a DV
    cam, and YOU are the director, then what you don't know, is sure to not
    hurt you, unless you see the actual 4:3 video from start to finish
    I had to explain this to someone at work last week, (after I showed my video
    clip as a demo, and they loved it) They only saw 16:9 widescreen on a 20"
    TV monitor. What they saw was MY vision (just like Hollywood)
    We are subject to THOSE that shoot movies for us to watch.

    Anyways, this is my NEW perfered way of shooting DV video for 16:9 output
    until I can get one of those $300 16:9 lens that take 16:9 video and puts it
    correctly inside a 4:3 CCD. I'm saving up for this, I hope
    But, in the mean time, I think my 4:3 to 16:9 conversions will do.. do you
    agree w/ me ?? or have issues ?? Lets talk

    -vhelp
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  28. Member DJRumpy's Avatar
    Join Date
    Sep 2002
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    Dallas, Texas
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    Your methods should work perfectly. It's the exact way I would convert a 4:3 movie to 1.77 (if the desire struck anyway). When I said I can't bare to chop a movie up, it is only my personal preference. Many people prefer to crop a movie to make it fit a particular aspect ratio. It's also more common for people to crop to make a widescreen movie 4:3 fullscreen, while your going in the opposite direction

    In either case, your methods are sound, and will look fine on a widescreen telvision. I don't think a test is necessary, but if it will really make you feel better, I'm willing to burn a sample for my widescreen. Just PM me with a URL I can download it from. I'd rather not have you mail it to me, as differing mail size limits tend to make mailing attachments of the size were talking about problematic.
    Impossible to see the future is. The Dark Side clouds everything...
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  29. Member
    Join Date
    Jul 2003
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    london uk
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    i dont understand any of it, which is a shame cos i have quite a few widescreen dvds but only a full screen tv, so it gets annoying when i have to zoom the picture to watch it at any decent size. this looks to complicated to me, im no good at maths.
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  30. Member
    Join Date
    May 2003
    Location
    Oz
    Search Comp PM
    Thanks for your guide. It explained a few things I didn't understand that enabled me to crop and resize my DVD-rip for displaying in another ratio without disrupting the aspect ratio.

    I'm not very good at comprehending this aspect ratio stuff either - I always struggle with this part or it - but I think I've found a relatively easy way of working it out and getting it right this first time every time.

    With no disrespect to your guide, there is another excellent guide located here
    Code:
    http://mitglied.lycos.de/sabinelmar/svcd/SVCDTips.html
    which includes a utility called '(S)VCD design helper' which automatically does most of the critical mathematics for you at the press of a mouse button. It works perfectly for AVI files where there is no MPEG display aspect ratio involved, but once you've determined the *real* aspect ratio of an MPEG or VOB, you can use it here as well. It also automatically takes in account the TV overscan so you don't waste bits encoding parts of the picture that you're never going to see.

    As an example, I ripped an anamorphic DVD this morning which was 720x576 with 140 pixels of letterbox black bars. I wanted to crop it for display as 16:9 on a 4:3 TV in XSVCD. I used your guide to determine that the real aspect ratio of the movie was (576 x 16:9 =) 1024x (576 - 140 =) 436.

    I then just put 1024x436 into the input boxes in (S)VCD design helper along with the side crop dimensions I wanted of 249 (left + right) and pressed 'Calc' and it gave me the correct resize aspect ratio I needed of 672x400. Actually the 672 comes out as 448, but the program is written around standard SVCD sizes, so I just adjusted this for the full D1 XSVCD size encode I wanted to make - works just the same.

    HTH someone.
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