Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
05-31-2009, 11:18 PM   #1
Veteran Member

Join Date: May 2008
Location: SF Bay Area
Posts: 417
USB Memory usage by K-7 while recording video?

I am very impressed by the K-7 and plan to buy one. However I have following questions:
  • What is the memory taken by K-7 while recording a 720p video at 30 FPS?
  • I have to record HD video for nearly 1 hour. Does k-7 also ship with a good video compression software?
  • What should be the HD video resolution setting on K-7 without compromising quality?
  • Is an 8 GB Extreme III card good enough for medium quality video for 1 hour?
    Is MJPEG a big memory hog on k-7?
Apologies if these questions have been asked before. If so please point me to those threads.

05-31-2009, 11:59 PM   #2
Forum Member

Join Date: Feb 2007
Location: Los Angeles
Posts: 77
1. Approximately 4GB for 23 minutes of video @ 720p/30fps, according to the Pentax rep.
2. The K-7 shoots Motion JPEG, which is already compressed. It's unknown if any additional video compression software will ship with the camera. If you want to compress the video further, there are many software applications available.
3. If you are shooting for standard broadcast formats, then 720p. The 1536x1024p30 mode is interesting, but it is not a standard broadcast format or aspect ratio. The camera may upscale when displaying this format over HDMI.
4. Maybe not. The Pentax rep said that the K-7 can do no more than 30 min of video in one shot. 8GB is good for about 45 min of video per #1

Yes, Motion JPEG is a memory hog. It lacks inter-frame compression, so it's easier to deal with for editing, but it takes up much more room than AVCHD (H.264). I don't know if audio is also compressed or recorded as PCM.

  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
camera, dslr, hd, hour, k-7, memory, photography, quality, questions, video
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Too dumb for K-X video recording Finger Video and Pentax HDSLRs 19 07-12-2010 10:23 PM
K7 Video maximum recording length dogbear1980 Video and Pentax HDSLRs 3 06-29-2010 05:27 AM
kx stops recording video after 30 seconds jupzchris Pentax DSLR Discussion 8 06-20-2010 06:00 AM
how does the lack of AF impact video recording? Keebler Video and Pentax HDSLRs 17 02-13-2010 11:44 PM
SD Card for Recording Video on K7 GoremanX Pentax Camera and Field Accessories 4 12-21-2009 09:54 AM

All times are GMT -7. The time now is 07:21 AM. | See also:, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]