@kwag
For me "1-77-0-1-0" gives the best compression and also good results. Some questions by encoding at a very low resolution like 240x160: Recommended CQ_VBR? Right, or? Is it OK that I use a min Bitrate of 0 or should I use 1 and enable padding not to be lower than minimum bitrate? Kwag you say 300kbps at Max; also with this resolution (240x160)? Is it ok that I don't use b-Frames in GOP also with normal KVCD? The Values of CQ_VBR is over 50 CQs lower than CQ is its right or better say OK? |
Kwag
OK I lied about that being my last question. In your template you have the gop set to 1-18-3-1-48. What changes would you make? Just bump the 48 to 64 or what? You would possibly drop the framerate to 12fps? You also have all the "special settings" checked including soften block noise. Should I leave these the same. Thanks Magnus |
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Without B frames, you'll get less compression. Quote:
-kwag |
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In such a small screen, you might just tolerate the small jerkiness, at the cost of smaller final file size ;) Quote:
Clear that. Remove the "Soften Blocks". It will actually make your encode more blocky. Also, don't use overscan blocks for that encode, because there is no overscan on those Smartphone screens. Just like in a computer monitor. Only TV's have overscan ;) Just for kicks, here's a clip at 160x120 (QQVGA resolution). http://www.kvcd.net/smartphone-160x120.mpg It's 38 seconds long, and only 431KB :lol: Please, use Vdub to play it, so that it displays in actual size. That was encoded at a CQ_VBR value of 18.59 at a frame rate of 12fps, which yields a final size of ~80MB (full video encode, without audio) :mrgreen: You'll probably need glasses to watch it on a smartphone screen, but at that size, it looks pretty damn good :lol: MIN was 0 and MAX was 300Kbps and GOP of 1-5823-2-1-72. -kwag |
Kwag
Thanks for all the help! I think that covers it. I'll be be watching quality (yet tiny) movies on those boring flights on who would have thought it.... my phone. Thanks Magnus |
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Oh yeh, and how about some sound :lol: |
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(1) I frames only ( worse compression ) (2) I and P ( better compression ) (3) I, B and P ( Best compression ) So the lower the bitrate, #3 will give best quality. However, for studio broadcast quality, I frames only at a very high bitrate ( ~50,000 ) will give the best quality. I can't see how you possibly got better quality without B frames. Unless you used a much higher bitrate with I and P than with I, B and P frames. -kwag |
Later I will post you some results and you can see what I mean. :D
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http://www.kvcd.net/bourne-small.mpg Edit: 160x120. GOP = 96 8O, 23.976fps. 3 B frames. CQ_VBR=18.59, KVCD Notch matrix. -kwag |
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I've got to get me a Smartphone :D |
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-kwag |
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