【转帖】三国新语
作者:黄敏 日期:2009-09-28
2009-09-26 庙会：Royal Melbourne Show (内有制服美女，速入)
作者:黄敏 日期:2009-09-27
【转贴】A simple A-frame Chicken coop
作者:黄敏 日期:2009-09-21
Chicken coop
A new home for chooks so they don't fly the coop.
点击下载此文件Fresh are the best! And they taste even better when they've been laid by happy chooks in your own backyard. This A-frame chicken coop can be moved about your yard quite easily and will keep your hens feeling clucky, safe and right at home.
A chicken coop that can be lifted and moved around the garden is a great way to fertilise the yard while the chickens enjoy a feast of bugs, pests and weeds. The coop has everything that opens and shuts to lock away your chooks at night plus give you easy access to collect eggs.
Tags: chicken_coop 鸡窝
MNP-101 1080p 网络高清媒体播放器
作者:黄敏 日期:2009-09-16
最近一直想弄个支持网络的高清媒体播放器。主要目的是作为HTPC的一个补充，给小朋友和爷爷奶奶们在客厅里看存放在文件服务器上的电影电视剧，所以要求指标不是很高，能看下载的电视剧，动画片，数字电视录像就可以了。如果真要看高清视频或bluray电影的话，我会使用已有的HTPC。
前段时间流行了一段时间的WDTV Player被首先排除，因为它没有网络功能。最近最热的是这个Popcorn Hour C-200
这个型号看上去是比较完美的，突出的功能包括：支持wmv，可安装内置硬盘，gigabit-network, 支持Bluray等。但是bluray光驱要自己另外购买安装。但是就是价格太贵($449 advertised)，而且很多功能不一定用得上。对于我的使用目的来说是有点浪费了。
前段时间流行了一段时间的WDTV Player被首先排除，因为它没有网络功能。最近最热的是这个Popcorn Hour C-200
这个型号看上去是比较完美的，突出的功能包括：支持wmv，可安装内置硬盘，gigabit-network, 支持Bluray等。但是bluray光驱要自己另外购买安装。但是就是价格太贵($449 advertised)，而且很多功能不一定用得上。对于我的使用目的来说是有点浪费了。
Resource compiler: error RC2173
作者:黄敏 日期:2009-09-15
Review on MNP-101 1080p Media Player
作者:黄敏 日期:2009-09-14
It has been a while since I started looking for a network media player. The purpose is for the kids and grandparents to watch the movies stored on the home network server in the living room.
A while ago, WDTV player has been quite popular, but it was off the table immediately due to the lack of network capability. The lately, the most talked-about player is PPopcorn Hour C-200
A while ago, WDTV player has been quite popular, but it was off the table immediately due to the lack of network capability. The lately, the most talked-about player is PPopcorn Hour C-200
Tags: MNP-101 mediaplayer rmvb H.264 full-hd
5d mark-II HD video files
作者:黄敏 日期:2009-09-10
Playing
It turns out even playing the HD video files (container: mov, video code: H.264, res: 1980*1080) alone is a challenging job for moderate computers. This is quite a surprise to me.
At home on my Intel E8400, with 4G RAM, WinXP 32-bit, the playback through Quicktime player is glitchy. Quicktime seems to have to jump a few frames every other seconds or so, to keep up with the framerates.
It turns out even playing the HD video files (container: mov, video code: H.264, res: 1980*1080) alone is a challenging job for moderate computers. This is quite a surprise to me.
At home on my Intel E8400, with 4G RAM, WinXP 32-bit, the playback through Quicktime player is glitchy. Quicktime seems to have to jump a few frames every other seconds or so, to keep up with the framerates.
Shooting Video with 5d MarkII
作者:黄敏 日期:2009-09-08
While the video capture capability is a highly useful feature, it comes with a few caveats about the way it functions:
- Exposure is automatic but your Exposure Compensation controls still work. This is Big. Using Exposure Compensation, you can influence the camera’s opinion on exposure within a range of four stops, over and under inclusive.
- Exposure Lock is available and must be used. Once you and the camera agree on an exposure using the above-mentioned Exposure Compensation dial, lock that sucker down. The last thing you want is for the camera to drastically change exposure just because something bright or dark suddenly enters frame. Trust me it absolutely will if you don’t use the Exposure Lock feature.
- There are a couple of ways to do an autofocus approach but they are awkward and frustrating. Buck up and learn to manually focus the way the big kids do.
- Sound can and will be recorded through an internal mic but don’t expect much quality. The camera’s onboard mic will hear you best of all. It will also hear the Image Stabilizer and any other camera noises. Better sound can be acquired by using an external microphone that can be attached through the “audio in” plug. Consider something like the Sennheiser MKE400 if sound is important and you don’t mind coughing up the cake. I think it’s best to concentrate on picture during your earliest explorations…
- Yes! Image Stabilization does work in video mode and is always activated unless you manually turn it off on the lens. This is a great help for handheld work and makes the 24-105mm f4 IS a really useful lens on the 5D Mark II.
- Still captures may be in RAW or jpeg format and either sRGB or Adobe RGB according to you choice. The video color space is sRGB and no Raw equivalent is available. Too bad; I hope this becomes available in future generations. As it is, watch your exposures and stay tuned to proper white balance.
- Picture Styles apply! This is also Big. By custom tuning your Picture Styles, you can have great control over how the camera records color sharpness, and contrast. B&W and Sepia modes are readily available and that just too cool for words…
Using Manual Exposure Control during video recording:
Once it’s installed, the new firmware makes it pretty easy to actually perform your exposure adjustments. The same dials and controls you’d use to manually adjust exposure when taking still images are used during video recording, so operation is pretty intuitive for anyone with familiarity with the camera.
Here’s the procedure:
Make sure your Live View Function Setting is on Stills + Movie, and your Screen Settings are on Movie Display
- Live View/Movie function settings: Be sure your LV (Live View) settings are set to “Stills + Movie”. Then, press the SET button as indicated on the Menu screen to drill one more step down, and set your Screen Settings to “Movie Display”.
This last point is vital: If your Screen Settings are anywhere but “Movie Display” you will not be able to manually adjust exposure. - Turn the Mode Dial on top of the camera to “M” (Manual exposure mode), as you would to manually adjust exposure during a still image.
- Press the Live View button (to the left of the viewfinder) to activate Live View. This is always a requirement before movie shooting is possible, and this firmware update doesn’t change that.
- If you want to see the camera’s analog metering scale to use as a guide for setting manual exposure, press the INFO button until it appears at the bottom of the LCD monitor. Now, as you make exposure adjustments, you’ll see the indicator on the scale change as lighting and settings change. Of course, users are also free to use a separate hand-held meter or other methods to determine proper shutter speeds, apertures, and ISO settings.
- Turn the Main Dial (near the shutter button) to adjust shutter speeds, over a range of 1/30th thru 1/4000th of a second. Turn the rear Quick Control Dial to adjust the aperture setting, through the entire range available on the lens you’re currently using. And press the ISO button (top of camera) and turn the Main Dial to vary ISO, or set Automatic ISO operation.
Press the INFO button on the rear of the camera to see the analog metering scale as an exposure reference in Movie Mode
Shutter speed range in Manual Exposure shooting:
As noted above, users can set manual shutter speeds during video recording anywhere from 1/30th of a second thru 1/4000th. Speeds can be set in 1/3-step increments, or via Custom Function I-1-1, in 1/2-step increments. Shutter speeds are set by turning the Main Dial, preferably before video recording begins, although they can be set and changed during actual recording.
The effects will take place virtually immediately, but it’s possible that the sound of clicking through the dial’s settings will be picked-up in your video footage through the camera's built-in micorphone (of course, that can be avoided by using an optional external microphone plugged into the camera's audio input, or using a seperate portable sound recording device).
Use the Main Dial to control the shutter speed during manual exposure in Movie Mode
It should be noted that during full automatic exposure operation, the EOS 5D Mark II is limited to shutter speeds of 1/30th through 1/125th of a second only. In fact, Canon recommends that if users are shooting action type footage, that they consider using 1/30th~ 1/125th speeds for smoothest continuous movement in finished video. When higher speeds are used, it’s entirely possible that action or movement in video footage will appear more choppy, even though the 30 fps frame rate is unchanged. On the other hand, for users who may consider “frame grabs”, the faster shutter speeds will usually mean sharper, crisper individual movie frames from which to “grab” individual still images. The bottom line is that users should experiment with video footage at various shutter speeds, to see what impact the fast speeds provide for different types of subject and/or camera movement.
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Increasing the shutter speed too far beyond 1/125th sec. will result in an unusual staccato or 'stroboscopic' effect to your movies, due to the decreased motion blur from frame to frame. This can be used to effectively capture fast-moving objects in greater detail (such as race cars or other sporting events). It can also be used creatively to convey increased energy/movement, a sense of tension, or to create a surreal quality to your footage.
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Lens aperture settings:
Apertures are adjusted by simply turning the rear Quick Control Dial, once the EOS 5D Mark II has been set-up for Manual exposure shooting during video recording. Be sure the camera’s main On-Off switch is raised to its upper-most position, which activates the Quick Control Dial — if you’re just set to “ON”,
the camera itself is active and turned on, but you won’t be able to adjust the Quick Control Dial for any exposure-based settings.
Use the Quick Control Dial to control the aperture settings during manual exposure in Movie Mode
Any lens aperture that’s supported by the lens can be manually set by the photographer. Apertures can be changed during actual video recording, but as with shutter speeds, please note that you very well may pick-up mechanical sounds from both the click-stops on the dial, and also from the electro-magnetic lens diaphragm as it moves the aperture blades.
ISO settings:
Any ISO from 100 through 6400 can be manually selected by the photographer when the Manual exposure control is active. Press the ISO button (top of the camera), and turn the top Main Dial (near the shutter button) to adjust ISO; you’ll see a list of ISOs appear on-screen when you press the button, with the current setting highlighted in blue. You’ll also see a little icon on the lower-right corner for the Main Dial, reminding you that this is the control that’s used to adjust ISOs.
Interestingly, the Auto ISO setting can be used as well. In fact, if a video shooter wants to lock-in a particular combination of shutter speed and lens aperture, he or she can set those manually, and use Auto ISO to let the camera adjust exposure sensitivity on the fly. Auto ISO can adjust over the range of 100 through 6400.
You can manually select any ISO from 100 - 6,400 (12,800/"H1" if the ISO Expansion Custom Function is active). To change the ISO, press the ISO button on top of the camera, and use the Main Dial to select the sensitivity you want
Since one of the EOS 5D Mark II’s biggest attributes is its outstanding image quality at higher ISO settings, the ability to freely set any ISO up to 6400 gives enormous possibilities to the video shooter. Furthermore, when manually setting ISO, if the camera’s ISO expansion is activated (Custom Function I-3-1), the “H1” setting, equivalent to ISO 12,800, can also be set manually (it’s not available during Auto ISO setting).
Tags: 5d_mark_II video manual aperture
