MEMORY USAGE ON DIGITAL CAMERA - Page 1
Forum section: electronics / general

author: simon christo
author_rank: Regular Contributor
timestamp: February 10, 2023, 06:34:38 am
content: Hi there!!! I have a Great Digital 12MP SLR Camera, that I cannot flaw - except for it's 'unreal' memory usage on the SD Memory Card !!! I have a 128GB Memory card installed, as for Videos, it really 'Bytes it up, emensly!!'.Here are the Facts:Result for FORMATTED 128 GB SD CARD - BLANK.VIDEO FACTS:QVGA 1 HourVGA 22 Minutes !!WVGA 22 Minutes !!HD 8 Minutes !!!!!!Somthings Wrong !!! - At least in my view.I know it uses RAW Format for the Pictures, and , doesn't show a compressed format like JPG, anywhere on the Camera Screen.PHOTO FACTS:There are 3 RAW Formats displayed:7000 Photos8000 Photos9999 Photosand 2 others, with NO Descciption, (maybe indicticating a problem, with the Menus ROM)Both are 9999 Photos, but 1 is Compressed and the other isn't.Several Question's:1: Why is VGA & WVGA the same Time??2; 8 Minutes for HD, for todays cameras, shoud'nt be more like 128 Meg, NOT 128 GB??3: Other Cameras, take nowhere near this much Memory, for the same Vintage.Other than that - it's a Great Camera!! - Just don't use it for lengthy HD Videos !!!!Thanks Simon.

author: Kleinstein
author_rank: Super Contributor
timestamp: February 10, 2023, 09:10:15 am
content: For video it depends a lot on the compression. The compression can be quite different between motion JPEG (a sequence of individual compressed JPEG pictures) and modern video formates.Some of the photo cameras are not really made with video in mind. There can be license fees and high computational needs with the better compression modes. Quite some cameras fore license reasons have a limit on how long they record video at a piece (AFAIR some 20 min or so).With a good video format the recording time should be longer, though very high compression can also come with reduced quality and there can be different compression levels for the same resolution and type of compression.8 min to fill a 128 GB card looks a bit suspicious as this would need a data rate of some 260 Mbyte per second - not many cards are that fast writing.

author: mariush
author_rank: Super Contributor
timestamp: February 10, 2023, 10:13:55 am
content: I think qvga 320x240vga is probably 640x480wvga is probably 768x480not much difference so not much size difference, and could be the software "squeezes" the 768 pixels into 640 and just defines a different aspect ratioIf the camera even has such option as QVGA, I seriously doubt it has a 12 MP sensor, or it's probably some phone camera sensor.Maybe the camera can only access the first 32 GB of the card, due to various limitations, or something like that.But uncompressed 1080p 60fps YV12 is around 180 MB/s , compressed with motion jpeg would be much less... I doubt any format would use more than 10-15 MB/s because it's writing to a card.

author: Mouse69
author_rank: Contributor
timestamp: February 10, 2023, 10:23:21 am
content: You may be better of asking the question on your cameras forum (e.g. canonforms.com,https://photography-on-the.net/forum/)I have a Canon R5 that can take 8K video (I don't shoot video though), and the cards are rated at 800 or 1200 MB/s write (much faster than an SD card).Sorry I don't know the answer to your specific question and hope this helps you get the answer.From google 10 minute 1080p video @ 30fps'The default video resolution setting on most phones has been set at a minimum of Full High Definition (30FPS) or better. This means that a 10-minute video will produce a file size of just over 1 gigabyte.'

author: tooki
author_rank: Super Contributor
timestamp: February 10, 2023, 12:07:12 pm
content: What exact camera model is it?It’s very unlikely that the record time limitations are due to SD card size. It’s more likely limited by the size of some internal buffer or similar. You can easily test this by inserting a different size SD card, or taking your card and filling up a bunch of space on it.

author: Someone
author_rank: Super Contributor
timestamp: February 10, 2023, 09:46:04 pm
content: Quote from: tooki on February 10, 2023, 12:07:12 pm"Great Digital 12MP SLR" sure sounds like one of those imitation products out of a low cost no-name manufacturer, all nice words on paper but not comparable in real world. QVGA recording??? cant think of any branded SLR that has such a mode.

author: DavidKo
author_rank: Frequent Contributor
timestamp: February 15, 2023, 11:07:37 am
content: Check the specification. Such a info is usually in product datasheet (mostly with several stars).