iFrame (video format)
iFrame is a digital video format 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 make video editing easier. The non-Apple applications do not need to convert the video from the source via an intermediate format, but instead achieve direct processing of the original videos on Apple devices (e.g. iPad ) through this format .
Coding
iFrame video and audio is encoded with lossy compression . Only intraframe compression is activated, each image is a stand-alone I-frame. This means that each picture can be unpacked on its own - i.e. independently of the following or previous pictures. This massively relieves the hardware and enables video editing even on machines with lower processor and graphics performance.
Video is encoded using the AVC / H.264 compression method. Audio is encoded using the AAC codec . The compressed audio and video data are multiplexed in a QuickTime file.
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 results in a 16: 9 aspect ratio. 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 "jerking" which is understandable when compared to the traditional rate of 60 or 50 frames per second for television broadcasting .
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 SX 230 HS, PowerShot SX220 HS, 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