Category Archives: iSight

iMac 27 iSight Resolution

I recently got an iMac 27 and it’s a beauty. I have used the Photo Booth and captured both photos and video. Given I shoot most of my video in Full HD format, I am used to a very high quality video. So, looking at the video captured by iSight, it felt not as good. That’s when I wanted to find out the technical details of iSight and I couldn’t find much on Apple’s website. So, I looked at the photo and video files to gather the information and here is what I found.

Photo:

It’s a jpeg image and the file size is 106 KB (Of course, size varies based on the details in the image).

Dimensions: 640×480
Color space: RGB
Color profile: iMac
Alpha channel: No

Video:

It’s a mov file and the file size is 3.1 MB for a 1 minute 2 seconds video.

Dimensions: 640×480
Codecs: AAC, H.264
Color profile: HD (1-1-1)
Audio channels: 2
Total bit rate: 334

I wanted a further break up on the bit rate and more details. So, using ffmpeg, I found

Audio: aac, 44100 Hz, bitrate: 400 kb/s
Video: h264, yuv420p, 640×480, PAR 1:1 DAR 4:3, 20 tbr, 600 tbn, 1200 tbc

Obviously, this is no where close to my camcorder’s full HD video which has

Audio: ac3, 48000 Hz, stereo, s16, 256 kb/s
Video: h264, yuv420p, 1920×1080 [PAR 1:1 DAR 16:9], 59.94 tbr, 90k tbn, 59.94 tbc

So, that’s a huge difference in video quality. Of course, I am not expecting iSight to provide me Full HD support, just wanted to know what it’s capabilities are. It definitely seems to be good enough for video chatting. I liked the fact that it can show even far off objects very clearly, though there is no way to zoom. There are some softwares that provide zooming capability, but that’s only digital zoom.

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Filed under iMac 27, iSight