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kelly armstrong
bit rate
on Dec 13, 2011 at 12:26:50 pm

This a really basic question but one I need to know. How does a higher or lower bit rate effect your exported video?


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Shane Ross
Re: bit rate
on Dec 13, 2011 at 2:17:22 pm

Higher bit rate....larger file, better quality. Lower bit rate...smaller file size, lower quality (more compression artifacts)

Shane
Little Frog Post
Read my blog, Little Frog in High Def


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kelly armstrong
Re: bit rate
on Dec 13, 2011 at 2:28:40 pm

What would you say a large file to be in comparison to the bit rate? i have a 1.15 video with a 1000 bit rate. The client thinks it should be around 2,500...what do you think?


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Shane Ross
Re: bit rate
on Dec 13, 2011 at 6:02:15 pm

What is a "1.15 video?"

Shane
Little Frog Post
Read my blog, Little Frog in High Def


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kelly armstrong
Re: bit rate
on Dec 13, 2011 at 8:37:55 pm

sorry 1 minute and 15 seconds. I'm also exporting a 45m video... what would the best kbits/sec for that be? It's just a presentation.


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Shane Ross
Re: bit rate
on Dec 13, 2011 at 9:51:05 pm

BEST is subjective. Do you want it to look good, or be small?

1:15 with 2500 bit rate...at say 960x540...will look good. At 1000...not so much. Try it. Compress both ways and compare.

Shane
Little Frog Post
Read my blog, Little Frog in High Def


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kelly armstrong
Re: bit rate
on Dec 14, 2011 at 11:19:51 am

Thank you! I'm just looking to understand the balance a little bit better. How did you determine that estimate? I usually work with videos between 2-5 minutes in length. Would the bit-rate be 4000 for something like that? And is it the same as kbits/sec? Sorry for all of the questions I'm just trying to get a good understanding on this.


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Shane Ross
Re: bit rate
on Dec 14, 2011 at 4:12:45 pm

[kelly armstrong] "How did you determine that estimate?"

Experience. Trial and error.

[kelly armstrong] " I usually work with videos between 2-5 minutes in length. Would the bit-rate be 4000 for something like that?"

No. The bit rate doesn't double when you increase the times.

[kelly armstrong] "And is it the same as kbits/sec? Sorry for all of the questions I'm just trying to get a good understanding on this."

Compression is a dark art...is a full profession onto itself.

Might I suggest this:

http://www.peachpit.com/store/product.aspx?isbn=0321497031

Shane
Little Frog Post
Read my blog, Little Frog in High Def


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