| Author |
w900i video codec comparison + sample movie |
mysh
Joined: Dec 04, 2005
Posts: 176
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So i'm shortly getting a w900i, and i want to put some movies/tvshows on it. From what i've read, 400kbit is the max bitrate before it stutters or drops audio. So i'll use 64kbit HE AAC for audio compression. That leaves ~330kbit for video.
Thanks to numb for telling me how to mux .mp4 files in his music video thread btw.
I found a nice 1 minute scene from Lost series 2, episode 8, to test out various codecs and settings for speed and quality. It has high motion, low motion, day scenes, night scenes, simple images, and highly detailed images. Basically it covers all kinds of video.
Conclusion is, if you want the bottom line, xvid 2 pass gives the best compromise of speed and quality, at 24fps 330kbit anyway, which is most movies and tv. It handles everything without noticeable pixelation or detail loss.
Here's the 1 min test file encoded with xvid 2 pass, to show the quality level. if anyone with a w900i could test it out for fullscreen playback, thanks. 
*someone dies in this clip, spoiler warning if you haven't seen the ep*
http://www.vapulus.com/lostS02E08.mp4
Onto image comparisons, in order of best to worst, all codecs at the same 330kbit 24fps....
*NOTE - really, all these images used the same 330kbit bitrate*
xvid 2 pass - 46 seconds per minute of video - coped with everything.
divx6.0 2 pass - 63 seconds - equal quality with xvid 2pass, but slower.
3ivx single pass - 19 seconds - gets blocky on high detail and high motion, but encodes very very quickly.
xvid single pass - 35 seconds - not as blocky as 3ivx, but almost twice as slow for not a lot of quality gain.
divx6.0 single pass - 32 seconds - not very fast, ok for low motion images, but worst quality of all, enough said.
So there you go. The best settings for 320x240 film encoding for the w900i appear to be xvid codec, 330kbit, 2 passes, AS @ L5, with global motion compensation and adaptive quantization enabled. Encoded mine using virtualdub. within virtualdub filters i also used a bilinear sampled resize to 320x240, 12% brightness boost (vdub+xvid has a brightness bug), and a 50 sharpness filter.
I exported the audio as .wav, and used dbpoweramp to convert to "Nero AAC" @ 64kbit HE. Then i put the video and audio together into an mp4 file using MP4muxer.
Now to figure out a way to automate all that. hehe.
[ This Message was edited by: mysh on 2005-12-07 01:58 ] | |
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numb
Joined: Feb 07, 2005
Posts: > 500
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#mysh
Nice work mych
Good to see a fellow encoding enthusiast
Did you also find the GUI for Mp4Box ? - quite handy and saves some commandline work
http://www.divx-digest.com/software/yamb.html
PS. I dont think the K7xx/W8xx/W9xx platform support the divx mp4 codec as is, but perhaps it will if the four cc code is changed from divx til xvid.
[ This Message was edited by: numb on 2005-12-07 13:39 ] |
mysh
Joined: Dec 04, 2005
Posts: 176
PM |
Hey numb, thanks for the yamp link, mp4muxer is a gui frontend for mp4box too.
did you take a look at the sample movie? it seemed to come out really perfect quality, even at the full 24fps.
The divx6.0 codec has a portable compatibility profile by the way, which i was using, so it should work on any mpeg4 capable device.
not that i'd use it, it's 50% slower than xvid in 2 pass mode, for comparable quality, so i'll be using xvid for my encoding.
I did a quick test with a full movie, 97 minutes long, it took just under an hour to re-encode with virtualdub xvid 2 pass and filters, not too bad really.
Oh you can skip the brightness/sharpness filters and set the resize to nearest neighbour quality mode for the first pass, that cuts first pass time by about one third. It only needs the brightness/sharpness and bilinear resize quality mode for the second pass that actually writes the new avi file.
[ This Message was edited by: mysh on 2005-12-07 18:16 ] |
nextascy
Joined: Apr 27, 2006
Posts: 1
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use Xilisoft Video Converter 3.1, create your own profile, works great, in one quick step |
DarkWolfX
Joined: Apr 06, 2004
Posts: 431
From: Mexico
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@mysh
Thanks a lot man for testing the settings and letting us know which is the best one. | |
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Access the forum with a mobile phone via esato.mobi
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Posted: 2005-12-07 02:53
