Why are HDTV mpg files so big?

[K.I.L.E.R]

1.3GB for 22 minutes of recording.
WTF??

 

[Captain Chickenpants]

Because 22 mins of high def is a lot of data.

1.3GB / (22*60) is less than 1MB/sec or roughly7.8787 Mb/sec which is allowed even under normal SD mpeg2 DVD's

CC

 

[London Geezer]

Cause they're HD...? And probably not MPG4? :smile:

 

[Gubbi]

That's not big, that's only 8.2Mbit/s.

DVDs are up to 9Mbit/s (typically around 6Mbit/s though).

Cheers
Gubbi

 

[Captain Chickenpants]

That's not big, that's only 8.2Mbit/s.

DVDs are up to 9Mbit/s (typically around 6Mbit/s though).

Cheers
Gubbi

Hehe. Here we see the difference between using 1024 and 1000 for the multiplications

[edit] Using 1024 is obivously the correct way to go, but I used 1000 as a quick approximation as my calc has nice buttons to do G and M etc. [/edit]

 

[K.I.L.E.R]

Unfortunately Australia's HDTV standard is half that of the rest of the world.
Only channel 9 offer 1080i HDTV everything else follows the (sub)standard of 540p.

What do you guys recommend I do about compression?

 

[Captain Chickenpants]

Unfortunately Australia's HDTV standard is half that of the rest of the world.
Only channel 9 offer 1080i HDTV everything else follows the (sub)standard of 540p.

What do you guys recommend I do about compression?

Are you still complaining about the size of the file? You would end up with a much bigger one if they went to higher bitrates (which would be required to get decent quality at 1080i)

CC

 

[K.I.L.E.R]

I would LOVE to reduce file size without much loss in quality.

Are you still complaining about the size of the file? You would end up with a much bigger one if they went to higher bitrates (which would be required to get decent quality at 1080i)

CC

 

[Captain Chickenpants]

I would LOVE to reduce file size without much loss in quality.

Well try another format.
Divx, Mpeg4, H.264 can all give better compression than mpeg2.

 

[LunchBox]

it's not the size that counts...

it's how you use it...