In time that is, for video recording?

--
Alan

Reply to alan (dot) holmes27 (at) virgin (dot) net

It depends on the quality of the recording.
As an average you can say anywhere from 1 to 6 hours, but this is an
approximation.

"Alan Holmes" wrote in message
...

In time that is, for video recording?

--
Alan

Reply to alan (dot) holmes27 (at) virgin (dot) net

"Alan Holmes" wrote in message
...

In time that is, for video recording?

T = C * 126.67 / B

Whe
T is the duration of the recording in minutes
C is the capacity of the DVD in (binary) gigabytes
B is the overall (audio+video) AVERAGE bitrate in megabits per second.

Notes:
- B cannot go over 9.8, in fact the maximum burst speed of 10.08mbps is so
close to the sustainable maximum of 9.8, that most people just set the
maximum at 9.8
- For self-burn, dye-based DVDs (which I assume is what you are talking
about, not mass-produced films) you should try to keep the maximum bitrate
under 7.5 which (through simple arithmetic) means the average must also be
below 7.5.
- The constant (126.67) contains a "safety margin" of 5% which should be
adjusted up for particularly complex DVDs

-----

If you are handy with mathematics, you might realise that this simple
equation is more useful if you turn it around to work out the average
bitrate you need to maintain for a given duration.

B = C * 126.67 / T

So for a 1:55:15 film, (115.25 minutes) to fit on a 4.7 GB disc, you'll need
to encode the audio+video at 5.165mbps (always round down to the next
significant digit) so if your audio is 192kbps your video will need to
average 4.973mbps.