TMPGEnc: Does the VBV Buffer setting effect image quality?
Does the VBV Buffer setting affects image quality?
I'm asking because I made 2 samples of svcd video, the first with VBV at 112, and the second with VBV at 40. The result was that VBV 112 makes a 4MB bigger file 8O in a 4min sample!!! Both samples play smoothly, and I can't see any difference in quality, but this is a huge difference in file size! |
yeah, i'd like to know that too! i noticed that effect several times, but i thought it's just the media I AM USING...
why do i need a larger vbv buffer size for mpeg-2 ? and DOES it really affect the quality? |
The higher the VBV value, the higher the quality, and also the file size and less compatibility with standalone players :wink:
That is, of course, referenced from the standard values used on VCD, SVCD, DVD. Stick close to the default values used on each format. 8) -kwag |
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Will the VBV value limit the amount of bitrate? And in this case no matter how hight you set the max bitrate, cause the VBV will cut it off? |
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It's like a "pre-fetch" queue, where you have a buffer size to work with. Makes sense right? no :lol: , here some info: http://www.bretl.com/mpeghtml/VBV.HTM -kwag |
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If it is like a "pre-fetch" queue… a buffer that the decoder :?: will work with, I assume that the quality will be affected at the decoding processes :?: . So, why it affects so drastically the file size? |
I don't know, but if you talk japanese :mrgreen: , you going to have to ask that one to Hori, the developer of TMPEG :lol:
-kwag |
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You want me to speak japanese! 8O I think that I will stay out of jananeese talk, and just make more tests... :wink: Thanks anyway kwag, :mrgreen: sayonara :!: aryghato :!: shynishywa :mrgreen: |
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