Re: [Flashcoders] Estimate FLV file size?

2007-12-26 Thread Cory Petosky
To be picky about nomenclature --

Amongst those in the know, b is bit and B is byte -- so 10 Mbps is
10 megabits per second but 12 MB is twelve megabytes. It's also totally
acceptable (and advocated by at least one proposed standard) to use the word
bit fully (e.g., 512 kbit/s).

In practical use, I've only ever seen kbps/Mbps refer to bitrates,
regardless of capitalization. When rates are used with bytes, I always see a
slash instead of the p -- that is, I have a 6 Mbps (megabit per second)
connection, so I usually download files at around 800 kB/s (kilobytes per
second).

Of course, people aren't generally as precise as they should be, so even if
you know the various standards out there, you've got to keep the context of
the number in mind to make sure it makes sense. :)

On 12/23/07, Micky Hulse [EMAIL PROTECTED] wrote:

 Latcho wrote:
  512 Kbits / 8 bitsperbyte = streaming 64 KBytes per sec = 3840 KBytes
  per minute = (3840 / 1024)  3.75 MBytes

 Wow, thanks for that. ;)

 Interesting stuff.

 I finally had a chance to compress a vid (using settings I mentioned in
 first post) and the file size was compressed to about 13mb (note to
 self, mb = megabytes) :D

 Playing with the numbers now though... the formula above is good to
 know. Thanks Latcho and Marc!

 Cheers,
 Micky

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Re: [Flashcoders] Estimate FLV file size?

2007-12-26 Thread Micky Hulse

Cory Petosky wrote:

To be picky about nomenclature --
...snip...
the number in mind to make sure it makes sense. :)


Wow, great additional info! Thanks Cory. :)

Kinda reminds me of the width always comes first for measurements.

Thank you for the detailed info. I am definitely bookmarking this thread.

Have a great new year!
Cheers.
Micky

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Re: [Flashcoders] Estimate FLV file size?

2007-12-23 Thread Latcho
512 Kbits / 8 bitsperbyte = streaming 64 KBytes per sec = 3840 KBytes 
per minute = (3840 / 1024)  3.75 MBytes


Marc Hoffman wrote:
Wouldn't it be kbps x total running time in seconds?  So if it's 512 
kbps for 100 seconds then it's 512 x 100 = 51,200 kb.


Marc

At 10:34 AM 12/22/2007, you wrote:


Hi all,

Just wondering if there is a good way to estimate flash video file 
sizes?


For example, lets say I have 2:30 of RAW DV footage that I want to 
convert

to:

* Video Codec: On2 VP6
* Encoding: 2-Pass VBR
* Resolution: 480x360 pixels
* Frame Rate: 30 fps
* Video Data Rate: 464 kbps
* Audio Data Rate: 48 kbps
* Total Data Rate: 512 kbps
* Keyframe: Every 6 seconds

Is there a mathematical way to calculate/approximate file size based on
(above) settings?

My rough estimate: 9.5 to 13.5 megabytes

Sound right to you?

Unfortunately, I do not have access to the/any video at the moment... I
would prefer to just test some real video, rather than bothering all of
you folks. :(

Tips on how I could roughly estimate file size would be great! Or, 
does my

guestimation sound close?

Thanks!
Cheers,
Micky


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Re: [Flashcoders] Estimate FLV file size?

2007-12-23 Thread Micky Hulse

Latcho wrote:
512 Kbits / 8 bitsperbyte = streaming 64 KBytes per sec = 3840 KBytes 
per minute = (3840 / 1024)  3.75 MBytes


Wow, thanks for that. ;)

Interesting stuff.

I finally had a chance to compress a vid (using settings I mentioned in 
first post) and the file size was compressed to about 13mb (note to 
self, mb = megabytes) :D


Playing with the numbers now though... the formula above is good to 
know. Thanks Latcho and Marc!


Cheers,
Micky

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[Flashcoders] Estimate FLV file size?

2007-12-22 Thread micky
Hi all,

Just wondering if there is a good way to estimate flash video file sizes?

For example, lets say I have 2:30 of RAW DV footage that I want to convert
to:

* Video Codec: On2 VP6
* Encoding: 2-Pass VBR
* Resolution: 480x360 pixels
* Frame Rate: 30 fps
* Video Data Rate: 464 kbps
* Audio Data Rate: 48 kbps
* Total Data Rate: 512 kbps
* Keyframe: Every 6 seconds

Is there a mathematical way to calculate/approximate file size based on
(above) settings?

My rough estimate: 9.5 to 13.5 megabytes

Sound right to you?

Unfortunately, I do not have access to the/any video at the moment... I
would prefer to just test some real video, rather than bothering all of
you folks. :(

Tips on how I could roughly estimate file size would be great! Or, does my
guestimation sound close?

Thanks!
Cheers,
Micky

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Re: [Flashcoders] Estimate FLV file size?

2007-12-22 Thread Marc Hoffman
Wouldn't it be kbps x total running time in seconds?  So if it's 512 
kbps for 100 seconds then it's 512 x 100 = 51,200 kb.


Marc

At 10:34 AM 12/22/2007, you wrote:


Hi all,

Just wondering if there is a good way to estimate flash video file sizes?

For example, lets say I have 2:30 of RAW DV footage that I want to convert
to:

* Video Codec: On2 VP6
* Encoding: 2-Pass VBR
* Resolution: 480x360 pixels
* Frame Rate: 30 fps
* Video Data Rate: 464 kbps
* Audio Data Rate: 48 kbps
* Total Data Rate: 512 kbps
* Keyframe: Every 6 seconds

Is there a mathematical way to calculate/approximate file size based on
(above) settings?

My rough estimate: 9.5 to 13.5 megabytes

Sound right to you?

Unfortunately, I do not have access to the/any video at the moment... I
would prefer to just test some real video, rather than bothering all of
you folks. :(

Tips on how I could roughly estimate file size would be great! Or, does my
guestimation sound close?

Thanks!
Cheers,
Micky


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Re: [Flashcoders] Estimate FLV file size?

2007-12-22 Thread micky
 Wouldn't it be kbps x total running time in seconds?  So if it's 512
 kbps for 100 seconds then it's 512 x 100 = 51,200 kb.

Ah, yes... that makes sense. :)

This might be another silly question, but how does one know when kbps is
kilobytes or kilobits?

Many thanks for the help. :D

Cheers,
M

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Re: [Flashcoders] Estimate FLV file size?

2007-12-22 Thread Marc Hoffman

bits :)

At 11:52 AM 12/22/2007, [EMAIL PROTECTED] wrote:


 Wouldn't it be kbps x total running time in seconds?  So if it's 512
 kbps for 100 seconds then it's 512 x 100 = 51,200 kb.

Ah, yes... that makes sense. :)

This might be another silly question, but how does one know when kbps is
kilobytes or kilobits?

Many thanks for the help. :D

Cheers,
M


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Re: [Flashcoders] Estimate FLV file size?

2007-12-22 Thread Marc Hoffman

bits :)

At 11:52 AM 12/22/2007, [EMAIL PROTECTED] wrote:


 Wouldn't it be kbps x total running time in seconds?  So if it's 512
 kbps for 100 seconds then it's 512 x 100 = 51,200 kb.

Ah, yes... that makes sense. :)

This might be another silly question, but how does one know when kbps is
kilobytes or kilobits?

Many thanks for the help. :D

Cheers,
M


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Re: [Flashcoders] Estimate FLV file size?

2007-12-22 Thread micky
 bits :)

Hehe, thanks! :)

I always get my bits and bytes mixed-up... esp. when it comes to video
compression settings.

Thanks Marc! Have a great new year.

Cheers,
M


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