Re: [dvd::rip] incorrect bitrate calculation for divx4
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Subject: |
Re: [dvd::rip] incorrect bitrate calculation for divx4 |
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From: |
Christian Lambert <clambert@xxxxxxxxxxx> |
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Date: |
Sat, 19 Jan 2002 00:42:53 -0800 (PST) |
On Sat, 19 Jan 2002, Thomas Oestreich wrote:
| Hi,
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| estimated bitrate (1kbit = 1000 bit) is:
| (bitrate.c) bitrate = (video[MB]/time[s]) * ((double) (1024 * 1024 * 8))/
| 1000;
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| passed to divx4 as:
| (export_divx4.c) divx->bitrate = bitrate*1000;
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| What's wrong with it?
Well I thought that since I was getting undersized files that
the bitrate was calculated incorrectly, but it looks like it may
just be due to the multipass algorithm and that some frames
might actually just compress more than what the codec predicted
for example.
-Christian
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