iFrame (Videoformat)

IFrame is a digital video format that was developed by Apple. It is based on existing industry standards, such as AVC/H.264, AAC and QuickTime, and can be used with compatible Mac and PC applications.

Development

The format was developed to facilitate the video editing. The non-Apple applications do not require converting the video from the source via an intermediate format, but this format achieved by direct manipulation of the original videos on Apple devices (eg iPad).

Encoding

IFrame video and audio is encoded with lossy compression. Only intra-frame compression is enabled, each image is a stand -alone I-frame. As a result, each image on its own - be unpacked - that is, independent of the subsequent or previous images. This relieves the massive hardware and enables video editing on machines with low processor and graphics performance.

Video is encoded with AVC/H.264. Audio is encoded using the AAC codec. The compressed audio and video data are multiplexed into a QuickTime file.

In order to reduce data rate and hardware requirements, the video has a size of 960 horizontal and 540 vertical pixels with a pixel aspect ratio of 1:1, which is a 16:9 aspect ratio results. Progressive scanning at a frame rate of 30 or 25 frames per second reduces the data rate even further, but it can lead to increased "bucking ", which is understandable when one compares it with the traditional rate of 60 or 50 frames per second for television transmission.

Hardware products

  • October 2009: Sanyo HD2000A, Sanyo FH1A dual cameras.
  • April 2010: Sanyo Xacti VPC- SH1
  • July 2010: Panasonic HM -TA1 HD pocket camcorder.
  • October 2010: JVC Picsio GC - FM2 Pocket Camcorder.
  • December 2010: Panasonic SDX1 camcorder.
  • February 2011: Canon PowerShot SX230 HS, SX220 HS PowerShot, IXUS 310 HS (aka PowerShot ELPH 500)
  • February 2011: Nikon S9100
  • February 2011: Panasonic HX- WA10, HX -DC10, HX -DC1, HM- TA20, HM- TA2
  • March 2011: Panasonic HDC- HS900, HDC- TM900, HDC- SD900, HDC- SD800, HDC- SD90, HDC- TM90
  • May 2011: Panasonic HDC- SD40, HDC- SD41, HDC- TM40
  • September 2011: Canon PowerShot SX40 HS
  • November 2011: Canon PowerShot S100
  • January 2012: Panasonic HC - V700
  • February 2012: Canon Powershot G1X, Canon PowerShot SX240 HS Canon PowerShot SX260 HS,
  • September 2012: Canon PowerShot SX500 IS, PowerShot S110
  • January 2013: Canon G15

Software products

  • iMovie
  • Final Cut Express, Final Cut Pro X
720p
407730
de