They do support AVCHD.
not really, they only support transcoding AVCHD.
Exactly like AVCHD, but of course we don't know the details yet...H.264 video and AAC audio
They do support AVCHD.
Exactly like AVCHD, but of course we don't know the details yet...H.264 video and AAC audio
If you are going to go all out and create a new editing friendly format (iFrame), why limit to 960x540 (30 fps)?
This isn't a limitation of the format... likely it's a limitation of the hardware. iFrame requires significant horsepower to encode it looks like (if it uses H.264.)
not really, they only support transcoding AVCHD.
Please, then, enlighten us. What's another file format designed to support in-place editing of lossilly compressed high resolution video, with such features as random frame access and tight audio synchronization?
I'm no expert on these things (which is why I find this confusing for me and timeconsuming for Apple) but I'm pretty certain any of the other ones would do just fine. However it might come with a license fee attached and the greedy Apple of today would never succumb to such a thing, they rather reinvent the wheel because they think the first one wasn't smooth enough...![]()
I've never once used iMovie because it doesn't support any video files I've ever tried to load. Does this update change any of that?
I'm no expert on these things (which is why I find this confusing for me and timeconsuming for Apple) but I'm pretty certain any of the other ones would do just fine. However it might come with a license fee attached and the greedy Apple of today would never succumb to such a thing, they rather reinvent the wheel because they think the first one wasn't smooth enough...![]()
Off topic . . . just a little note about your sig:
The two aren't mutually exclusive.
Okay I don't really know what you're talking about re: greed, etc, since they're using .H264 and AAC which are both licensed codecs.
But generally speaking, Apple doesn't invent new things unless what's out there doesn't serve their needs, in which case they don't hesitate to do so. They were among the first to latch onto AAC as a successor to MP3 and .H264 as a successor to MPEG2 -- however, when they decided existing lossless codecs were too processor intensive for mobile devices they didn't hesitate to build their own.
Just a quick example of where a new file format might be useful: in general, real frames don't exist in modern video, if you consider a frame to be a sort of snapshot in time. Instead, modern video is built using a series of references to past and future data, which are combined when the video is played to approximate a series of snapshots. These approximations are designed to be efficiently read in a forward direction from the beginning of the stream.
However, the most common behavior in video editing is not reading a stream from the beginning, but instead reading from an arbitrary frame to another arbitrary frame, starting randomly. Since frames don't exist in modern video formats, this means to begin playback you essentially need to back up until you have enough information to construct the frame, and then move forward until you've reconstructed the frame. To minimize the backtracking, video producers may decide to add extra snapshot data into their streams (also called keyframes or I-frames), increasing its usability along with its file size.
A new format that was designed to be read bi-directionally would allow for more efficient editing and file sizes by eliminating the need for these extra big frames. As would a file format that removed the need to perform this activity while editing, perhaps by saving smaller resolution cues in place of full fledged snapshots.
You think that's bad? MPEG video is defined in terms of i-frames, b-frames, and p-frames. This is going to cause market confusion in the pro-video market. Thanks a bunch Steve!
You think that's bad? MPEG video is defined in terms of i-frames, b-frames, and p-frames. This is going to cause market confusion in the pro-video market. Thanks a bunch Steve!
I really hope you're joking. someone who's informed and qualified enough to be a professional in the film and video-editing industry doesn't strike me as being someone to be easily confused by terminology... and I'd be surprised if 1 out of 1,000 consumers has ever heard the technological term "i-frame" used (even I hadn't until this post, and I'm relatively tech-savvy), so considering that eliminates both the pro and consumer markets, I'm not seeing where this alleged confusion will be coming from.
But how compatible is a MPEG-movie containing iFrame(s)? Can it still be played/reworked on units not supporting iFrame(s)?
I read it as a totally new format and not as MPEG-contained...![]()
MPEG Video uses i-frames in it's compression.
All mpeg / MP4 / H.264 uses these for compression.
This new iFrame format is based on H.264, hence they used the name iFrame, it is not a completely new format, rather an re-implementation of an existing one.
So then Apple is reinventing the wheel to fit their purpose in a way?
Either way, I wish they could use a standardized language for these things. This is too tech-geeky for someone old-school... When I read 'format' I'm thinking new file extension, program incompatibility and missing hardware support etc.
N/m, continue...![]()
If you read the press release these cameras offer 1080p 60fps plus lots of other goodies.
If iFrame video format = 960 x 540, then color me unimpressed.
AVCHD still multiplexes its audio and video into an MPEG transport stream rather than recording it as a standard MPEG-4 file
The tablet resolution?
If you read the press release you'll see that iFrame is limited to 960x540 which means when the camera is recording in 1920x1080 it won't be using the iFrame format.If you read the press release these cameras offer 1080p 60fps plus lots of other goodies.
There are a number of professional and prosumer codecs for this but I'm not sure if you are limiting your scope to just the consumer market.Please, then, enlighten us. What's another file format designed to support in-place editing of lossilly compressed high resolution video, with such features as random frame access and tight audio synchronization?
Just a quick example of where a new file format might be useful: in general, real frames don't exist in modern video, if you consider a frame to be a sort of snapshot in time. Instead, modern video is built using a series of references to past and future data, which are combined when the video is played to approximate a series of snapshots. These approximations are designed to be efficiently read in a forward direction from the beginning of the stream./QUOTE]
For content distribution, consumer cameras, and the prosumer market that general assumption is more or less correct, but for "modern video" as a whole it is not correct. Professional acquisition and editing codecs rarely use interframe compression.
Lethal
I've never once used iMovie because it doesn't support any video files I've ever tried to load. Does this update change any of that?