The HTML5 video "market" is highly fragmented almost to the point that every major browser supporting a different codec.

If recorded with a different codec, media must be transcoded during transfer.

Note that this is a completely different codec from G.723.

An application may use this information to control quality of service parameters, perhaps by limiting flow, or using a different codec.

As an example, the following are mean opinion scores for one implementation of different codecs:

Conversely, trouble can arise when an Internet phone user calls someone using an ordinary phone, which uses a different codec.

(Though not shown in the diagram, QuickTime 7 still uses plug-ins to support different codecs, just as it always has.)

This can be done in different codecs.

Browser plugins needed to accommodate the many different codecs would then become a thing of the past:

The recommended standards and protocols are designed ensure compatibility between different codecs and provide adequate high quality transmissions.