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Pegasys Products BBS [ Sorted by thread creation date ]
VBV buffer size has absolutely nothing to do with image quality.
According to ISO/IEC 13818-2 the VBV buffer size is the hard limit of how much data is buffered bevore it goes to the decoder. This is neccessary because mpeg1/2 isnt a smooth stream of data.
In very simple terms this means that if you choose the VBV size to low for the selected bitrate and GOP structure you will end up with an jerky movie in high bitrate scenes if you set it higher than the standard size it is unsure if your VCD/DVD player will still play the mpeg.
To say it once again: VBV buffer size is NOT used in the encoding process but an single value to help the player get the best buffer size for decoding. There is no way that this value can do anything to improve image quality.
This is not some instant blurb from me but hard fact from ISO/IEC 13818-2:2000 Generic coding of moving pictures and associated audio information: Video
Can you explain your statement?
To be honest Im dead tired about your behaviour, your unwillingness to prove things you claim and your ignorance.
If you still claim that VBV buffer size do anything for quality you should come up with some hard facts. But since there are none ...
What an pathetic answer. Prove me wrong or admit youre wrong and stop giving ill advice.
This forum is not some game like 'who posts more wins even if the answer is given from thin air'
Im having a problem with my video settings. When I encode the .avi movie it shows the .mpg full screen and I want it like the dvd, the two black strips above and below it. How do i do it?
This is a need trick I figured out myself by doing my stupid Math homework.
I noticed A lot of ripped DVD's on the I-net R anamorphic, so you'll get a kind of 16:9 within your 16:9 TV.
>just do the following for 16:9 :
>>>(HEIGHT / 4) * 3
>for NTSC it will result in: ( 480 / 4 ) * 3 = +/- 360
>for PAL it will result in: ( 576 / 4 ) * 3 = +/- 430
go to: "Settings -> Advanced" put "Video Arrange Method" on "Center (Custom size)" and fill in the "width" (always 480 for SVCD) and the above standing heights for your goal.
Personally I would sugest you drop about 10 of that, and your TV will be filled perfectly with 16:9.
Although, if the anamophic source was 2 squeezed, you'll get long faces. I'm used to that, so I'd advice you, to play the source movie with your "The Playa", which should be installed when you d/l the latest codec, and VIEW the source with a adjusted aspect ratio of 16:9!!! If you can live with the small diference, this is a very nice option, otherwise, when your star players of the movie are looking like aliens, I'd advice you to apply the other option, mentioned above about the "Full Screen (Keep Aspect Ratio)" thing.
Just experiment a little with it, try to find out how I did the resize 4:3 to 16:9, it's all maths in this world, ask the creator of TMPGenc ;)
Actually your calculations are wrong and don't make any sense as they don't take into account the aspect ratio sizes at all.
The aspect ratio you have calculated for are not for 16:9 but are for 4:3
The correct aspect ratio calculations for 16:9 would be
>width 480(really 720)/16 = 45
>then to get the height 9x45 = 405
>which = 480x405 in SVCD format but because apect ratios should be in multiples of 8 it would be 480x416 or 480x400
This is true for all aspect ratios.
The output should then be set at 16:9.
As long as the correct input aspect ratio is selected then TMPG will produce the correct output size whether you choose 4:3 or 16:9 as the output ratio, so if you want a 16:9 movie displayed correctly on your 16:9 T.V. simply use the calculation above or let TMPG do it for you by selecting 16:9 full screen (keep aspect ratio) as the input and 16:9 display as the output. This will give perfect sized images identical to the original.
Well for your information my friend I wasn't refering to the aspect ratios of the goddam original movie film, but the aspect ratio of the AVI or MPEG you are using to encode which *WILL* be in a multiple of 8 or sometimes 16.
If you just do a search on aspect ratios you will find that all AVI and MPEG ratios are calculated in multiples of 8 and sometimes 16.
If the aspect ratios aren't in this ratio then the file will not compress properly.
Yes you are correct that you are only changing the size within the 480x480 frame, but what I was getting at is that because your original will be in a multiple of 8 or 16 then to get the correct size for the output so it is identical to the original size it would also have to be in a mutiple of the same numbers.
So your calculations are still wrong. For example how would the above calculation you offer work out for cinemascope which is 24:10 or 2.35:1
Using your calculation it would be exactly the same as 16:9 or 4:3 for that matter.
Whereas my calculations would be bang on.
So yes nice try sunshine. But read the post more than once before you make any comments of the like.
or u can do what I do (kinda like using a 40oz ballpean on crockery but it works) split .wav off in vitrualdub then use tmpgenc to code 'bout 5 minutes worth Stop the encoding an run it in media player.. if its still off try to time dif (1 sec 2 sec ect) goto GoldWave (or other FREE wav editor) and cut out dead space.. (will usually show up at front of file) (esimate time size) then save as *.wav part 2 and run tmpeg again and check takes alot of time but works.. Kinda like watchin 2 hippos dance... interesting but it ain't PRETTY..
i tried to convert a divix to vcd but after 18 hours i find out that the vcd is about double the size 650m0 to 1.2 what shall i do to limit it to 700mo max
peased answer me on my e-mail
philippe from france
ok 1 more... get freeware prog AV2VCD part of the download is a prod called "decompress.exe" it will decompress avi in a few minutes.. (don't get shocked at size of file) then convert (if it will) and use VCDeasy to cut and burn
When converting avi clips to mpeg, TMPGEnc is dropping frames or something, causing the actual (visible) video portion to be shortened slightly and the remaining running time to be filled with empty (blank) frames.
It's kind of hard to explain so I will give a specific example. I have an .avi that is 3:45 min and when I convert it to mpeg, the finished file is also 3:45 but when played, the actual picture (video portion) is shrunk down so that it stops at around 3:33 and the remaining 12 seconds is just a black screen. This is resulting in the audio being completely out of sync with the video. Obviously the audio isn't being affected the same way.
I've tried everything but the problem occurs every time, whether I'm just going from .avi --> mpeg or .avi --> .m1v.
If your scource is Interlaced and tmpgenc detects that then encode to interlaced. If it's not the don't encode it to interlaced.
Interlaced is for TV's but all dvd players and so on, tv output cards etc can fix that when they output the signal to TV but if the scourc is non-interlace try to keep that since it's better quality.
Well, the video file is the same as the audio file, and I dont think I have virtualdub, but Im not sure. Im new at this program and I have no clue what your talking about when u say some of this
please post in the same thread instead of making a new one.
Virtualdub, free full program from www.virtualdub.org.
Download it
Then open it
load the avi from file > load
then goto audio > full processing mode
then goto audio > compression and select no compression pcm
then goto file > save wav and type a name
then wait for a few minutes/secs
then load this wav file in the audio source in TMPGENC and load the video in the video source in TMPGENC and encode.
This should work, encode a sample first to see if there is audio coming.
>please post in the same thread instead of making a new one.
>
>Virtualdub, free full program from www.virtualdub.org.
>
>Download it
>
>Then open it
>
>load the avi from file > load
>then goto audio > full processing mode
>then goto audio > compression and select no compression pcm
>then goto file > save wav and type a name
>then wait for a few minutes/secs
>
>then load this wav file in the audio source in TMPGENC and load the video in the video source in TMPGENC and encode.
>
>This should work, encode a sample first to see if there is audio coming.
>
>Techno
"compression and select no compression pcm" if yur gonna burn vcd set "conversion" to 41000 also
Hey, does anyone know why when I convert a .avi to a .mpg, the sound wont come out on the .mpg but its perfect on the .avi? I loaded the video file, then it automatically chooses the audio file. Any ideas?
how come i always loose sound for few/30sec everytime after i cut my mpg2?
i had 1600MB file and cut it into two parts, and first part kept missing few seconds sound in the end.
BUG? but i tried the old 12a version and same thing happened
I do not know why but the other thing u can do is to encode the file but using the source range filter to mark the points where u want to encode from and to.
the sound was ok in the source mpg2, but just when i try to cut it it's missing sound in the first part.
and the weird thing is that that happens to mpg2 only, normal vcd files dont lose sound in the end.
i can't try vcdeasy because it's svcd
I have found the same thing. I have not found a way to fix it other than to use the source range - if you use the batch mode with the source range you can still do the whole thing in one go.
If anyone else knows how to fix this it would be GREAT!
What I currently do is to encode the first half 15 seconds longer and then the second half with 15 seconds of overlap. That way nothing is missing - when the audio cuts out it is time to change disc's.
Help!
After encoding a Divx file into mpeg, I played the mpeg but there was only audio NO visual. My PC config: Pentium 3 (1Ghz), 96mb RAM, Windows ME, Divx5 Player and codec bundle.