<p>This will get migrated but the short answer is that ALL-I stores every frame in it's entirety, whereas other methods store a certain number of keyframes in entirety, with the other frames stored as the difference to the keyframe.</p>

CC BY-SA 3.0
2012-09-15T01:54:08.113Z
@DmitryPashkevich Whether it affects perceivable quality depends on which codec, mostly. What is can often mean is when pausing the video, odd artefacts appear. It is definitely more editing-friendly, however, regardless of the codec.
nchpmn
CC BY-SA 3.0
2015-06-05T19:36:32.057Z
@nchpmn: If you get odd artifacts when pausing, your decoder sucks. >.<  I-only video is more editting friendly because you can seek more quickly to any arbitrary frame, instead of having to decode from the previous keyframe.  You can also cut / merge at any frame, because every frame is a keyframe, but that's only useful if you weren't going to re-encode for distribution.
Peter Cordes
CC BY-SA 3.0
2012-09-14T12:34:55.183Z
2012-09-14T12:34:55.183Z
Matt Grum
<p>I've started seeing this term mentioned in camera specs but have no idea what it means. It somehow relates to recording video.</p>

<p>Can somebody please explain where does it come from and what it means?</p>

<p>Here's all I found:
<a href="http://www.dslrnewsshooter.com/2012/03/02/canon-launch-5d-mkiii-headphone-jack-all-i-recording-and-better-controls/" rel="nofollow">http://www.dslrnewsshooter.com/2012/03/02/canon-launch-5d-mkiii-headphone-jack-all-i-recording-and-better-controls/</a></p>

<blockquote>
  <p>The compression system is the same as the 1D X and supports the higher
  bitrate <strong>ALL-I</strong> compression system alongside a more regular IPB option.
  The <strong>ALL-I</strong> mode is supposed to offer easier editing due to it’s less
  compressed nature, whether it also offers improved quality over
  standard IPB remains to be seen.</p>
</blockquote>

<p>Also, the upcoming Panasonic GH3 has </p>

<blockquote>
  <p>Video Bitrate 50Mbps (72Mbps ALL-I)</p>
</blockquote>

<p>Never seen this thing before...</p>

<terminology><video>
What does ALL-I mode mean?
Dmitry Pashkevich
# What does ALL-I mode mean?

(Asked by: username_0 on 2012-09-14)

I've started seeing this term mentioned in camera specs but have no idea what it means. It somehow relates to recording video.

Can somebody please explain where does it come from and what it means?

Here's all I found:
<http://www.dslrnewsshooter.com/2012/03/02/canon-launch-5d-mkiii-headphone-jack-all-i-recording-and-better-controls/>

> The compression system is the same as the 1D X and supports the higher
> bitrate **ALL-I** compression system alongside a more regular IPB option.
> The **ALL-I** mode is supposed to offer easier editing due to it’s less
> compressed nature, whether it also offers improved quality over
> standard IPB remains to be seen.

Also, the upcoming Panasonic GH3 has

> Video Bitrate 50Mbps (72Mbps ALL-I)

Never seen this thing before...

**Tags:** terminology, video


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## 1 answers

### Answer by username_1 on 2012-09-14. Score: 2 | Accepted answer

This will get migrated but the short answer is that ALL-I stores every frame in it's entirety, whereas other methods store a certain number of keyframes in entirety, with the other frames stored as the difference to the keyframe.

> **Comments:**
> **username_2**: @DmitryPashkevich Whether it affects perceivable quality depends on which codec, mostly. What is can often mean is when pausing the video, odd artefacts appear. It is definitely more editing-friendly, however, regardless of the codec.  
> **username_3**: @username_2: If you get odd artifacts when pausing, your decoder sucks. >.<  I-only video is more editting friendly because you can seek more quickly to any arbitrary frame, instead of having to decode from the previous keyframe.  You can also cut / merge at any frame, because every frame is a keyframe, but that's only useful if you weren't going to re-encode for distribution.  

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