Posts Tagged '5d'

Onscreen Audio Meters

From Cinema5d

 

It isn’t perfect by a long shot, but we’re making very swift progress this holiday weekend. I found the VRAM and was able to write a small task that monitors the audio levels at 30 Hz and draws a very simple level meter on the top of the screen. It is calibrated with 5 dB tick marks, but the ballistics are bad and it isn’t synced with the redraw period (causing it to flicker), but we’re running real code doing real work on the camera!

I promise you this is the most boring 45 second video you will ever see, but it provides a glimpse of the promise of what we can do with this camera.

EDIT: I found the calibration table for the audio device as well as some bugs in my drawing code. I’ve added calibrated 5 dB tick marks (-40 on the left to 0 dB on the right) and wrote some simplistic ballistics for the peak with a few second delay. The video is a new one to reflect the changes.

Canon Audio Gain Hack

From a Cinema 5D Post

 

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As an early goal, I have disabled the AGC for on the AK4646 audio chip that the 5D uses by overriding the sound_dev_task() at 0xFF856E60 to call audio_set_alc_off() at 0xFF856B14. The level is much too hot due to the wrong levels selected (it defaults to max gain?) but there is no shift in quiet scenes anymore. This is an easy first step that provides a proof-of-concept modification for the 1.0.7 firmware.

I can also log the audio levels as they are being sampled, which will make it possible to do on-screen level meters at some point in the future. My next step is figuring out how to add menus for the AGC disabling, then tackling the MVR_start_record() and LVAE_* functions.

Canon, we are tired of waiting for you to act. So, without you, we will first fix the obvious problems, then we’ll make it better. We’ll probably help you sell more cameras, too.

Firmware Update in the Wild?

Canon Rumors just received a hint about a firmware update in the wild for the 5D Mark II:

Firmware Update

I’ve been told that Canon lent 4 5D Mark II’s to a certain company with a firmware version not currently available.
The firmware is geared towards video. No word on whether or not some manual controls have been added.
I’ve been asked not to mention the industry or the project, so I won’t.

If anyone get one of these, please feel free to share them with me/us. 🙂

[link]

Canon EOS Rebel T1i

It’s official, the new Canon EOS Rebel T1i is out and can shoot videos.

Canon T1i

Specs:

• 15.1 Megapixel APS-C CMOS sensor
• Full HD movie recording with HDMI connection for viewing and playback on an HDTV
• H.264 video capture @ 1080p/20fps and 720p/30fps with mono sound
• ISO 100-3200 (expandable to 12800)
• 3.4fps burst shooting for 170 JPEGs or 9 RAW files
• Max. 170 large JPEG images in a single burst
• 3.0” ClearView LCD with Live View mode
• 9-point wide area AF with cross type centre point
• High speed DIGIC 4 performance and superb image quality
• The 50D’s lens peripheral illumination correction
• Three-inch, 920,000-dot LCD (same as the 5D Mark II’s)
• Built-in sensor dust removal system
• Canon’s “Creative Auto” mode for light exposure tweaks on full-auto
• Saves to SD/SDHC cards (class 6 or higher recommended)
• Full compatibility with Canon EF and EF-S lenses and EX-series Speedlites, including new Speedlite 270EX, TS-E 17mm f/4L and TS-E 24mm f/3.5L II
• $899 with kit lens, $799 body only, available early May

There is only one thing left to say: What the heck is wrong with Canon… 20p???

More info at:

Gizmodo
Canon Rumors

CNet (Video)

Firmware Update In First Week Of April?

The site Canon Rumors received an email stating the update will come in the first week of April.

Expect to see a new firmware update for the 5D Mark II sometime in the first week of April. Expect to see an added feature. I can’t say for sure what it is, but it’s there.

We don’t know how much is true about this email. It was classified with a rating of 2 out of 5 (0 to 5).
Let’s just hope Canon brings something good!

Dear Canon,

Constructive Comments and Feature Suggestions

for the next firmware update

  • ADD: FULL MANUAL CONTROL in Movie Mode (that includes Aperture, Shutter speed and ISO settings)
  • ADD: More Frame Rates options in Movie Mode (24p, 25p)
  • Direct access to Movie Mode (instead of browsing menus with many clicks) //apparently already solved
  • IMPROVE: more Flexible and Faster CONTRAST AF in Movie mode if possible. Much useful if achieved!!
  • IMPROVE: Automatic white balance (AWB), specially in artificial light
  • IMPROVE: Auto LCD Brightness to Match recorded image
  • ADD: More Frames in BRACKETING MODE (up to 9, so important for HDR Photography, more and more used these days)
  • ADD: GAIN CONTROL (Mic Level) for external Audio input. Allow AUTO and MANUAL setting Level
  • ADD: CHROMATIC ABERRATION CORRECTION for JPG shoots (AUTO/MANUAL/OFF). Nikon has it (automatically corrects it and improves the image quality VERY much, since almost every lens has Chroma aberration)
  • ADD: Selectable lower and upper limit for Auto ISO
  • ADD: Mass storage device USB mode option
  • ADD: Built in microphone for audio notes (as in 1D series)
  • ADD: New Feature: allowing to REMAP hot / defective pixels by the user (Official function, not a workaround) This will save lot of money to Canon Tech Service.

Thx to “Pablov” from cinema5d

Manual Control Coming?

Great news!
Canon revised the White Paper for the 5D Mark II.
Manual Control might come…

Here is what it says:

Perhaps more importantly, with the EOS 5D Mark II’s large image sensor and its ability to use very fast lenses, users can obtain shallow, selective depth of field that is difficult or impossible to achieve with regular camcorders with smaller image sensors. This sensor size difference means that, for any given combination of aperture value, subject distance and angle of view, images from the EOS 5D Mark II will have shallower depth of field than images from a conventional HD device. EOS 5D Mark II users can take advantage of this feature to produce high quality HD movies. Canon is gratified at the overwhelmingly positive market response to the EOS 5D Mark II camera. Based on this success, it’s only natural that advanced users are looking for manual aperture control in movie mode, and Canon is listening to constructive comments and feature suggestions. In the meantime, we hope that our comments here will help to clarify the White Paper’s statements on depth of field control in movie mode.

Download the White Paper