HDV file size versus DV
 

Does anyone have a comparison of a file size from a clip from an HD100 with a regular DV clip? I'm trying to compare for buying storage. Isn't the size of the files comparable to regular DV?

I wasn't sure whether to post this in the editing forums or not so if I should've please forgive me.

Native HDV1 (720P) files are actually smaller than their DV counterparts. HDV2 (1080i) are the same size.

DV uses 25Mbps (2.8MB/s), but HDV1 only uses 19.2Mbps (2.3MB/s.)

That translates to approximately 10 Gigabytes per hour for DV or HDV2 (1080i), but only 8.2 Gigabytes per hour for HDV1 (720P).

I actually get closer to 13gb per hour for HDV 1080i.

Both DV and HDV record at 25mbps. Thus, one hour DV or HDV gives you about 13GB file.

Audio that has been converted to 48Khz 16-bit uncompressed probably accounts for the difference.

DV and HDV 1080i 25 Mb/s

25 Mbits / second
25.600 bits / second
3200 bytes / second
3,125 Mb / second
187,5 Mb / minute
11,250 Gb / hour

if you get 13 Gb/hour it is probably because of the fact
1) Tapes are about 63 minutes
2) This is the actual size of files, size of files on a HDD might be different (1000 - 1024 difference: E.g. 1,5 Gb is not the same as 1 Gb and 500 Mb)

HDV 720p (19,7 Mbits/second with the audio included)

19,7 Mbits / second
20.173 bits / second
2522 bytes / second
2,46 Mb / second
147,75 Mb / minute
8,865 Gb / hour

So, taking everything in account, 1 hour of DV or 1080i HDV is about 11 Gb and 1 hour of 720p HDV is about 9 Gb.

But Brett, remember: if you should use Cineform for the HD intermediate codec, your filesize will shoot up to about 30 GB / hour for HD