About Converting

vbimport

#1

Say I have a video file that has a bitrate of 1000kbps…

Will re-encoding the file with a 2000 kbps be just wasting space? Or will it benefit the quality?

Should I always convert the bitrate identical to the source?


#2

If you are using the same codec, yes you are just wasting space and spinning your wheels.

If you are converting an avi to mpeg2, then you should use a much higher bitrate in mpeg2 to maintain quality.

If you are converting xvid/divx to h264 you can get away with a lower bitrate.

The commonly used codecs vary in their ability to compress video efficiently.


#3

ahh I see thank you Kerry…

In this case I am converting Divx/xvid videos to MPEG-4 (ipod)

What do you recommend I do with the bitrate… higher? lower? same?

Thanks…

Mike


#4

Are the resolutions similar? I don’t encode for ipods, so I’m just going by what I’ve read…it seems the common settings are 320 x 240 or 640 x 480? And 16 x 9 video would be 640 x 352. It looks like max bitrate settings are 1.5mbps for H264 and 2.5mbps for Mpg-4.

Best to test for yourself. Encode at the same and see if the quality seems good.


#5

hmm, k thanks Kerr!

: )