Avi to AVIdivx

[bilbom]

Hello,

I have a avi file of 700mb and want to add subs to it.

I know how it works and everything

i have only one question

What do i have to do for the highest video quality possibele (the file size doens't matter)?
I think it had something to do whit the video bitrate? higher is better quality?
So the meaning of my question is: i don't want to change much of the original file just add subs in it, whithout loose of picture quality! (it doesn't matter if it is 700mb or more)

I hope my question is clear?

thanks

[jagabo]

Use a player that accepts external subtitle files. You won't have to reencode at all.

[bilbom]

Its for play on a ps3 system

i put my file on a usb stick and play it from there

but i think ps3 can't handle subtitles?

.srt files

So i burn the subs into the file, that works well

If somebody know how it works more easily; please explain?

[jagabo]

I don't know about the PS3 but players that support external subs will automatically (you may have to press the subltitles button on the remote) display the subs if the sub file has the same base name as the movie:

MOVIE.AVI
MOVIE.SRT

Some players have a mechanism to let you select the subtitle file separately.

Note that many players don't fully support long filenames on FAT format drives. If you use a long filename the player may not recognize that the AVI and SRT have the same base name. So stick with 8.3 naming conventions. Use no more than 8 characters in the base filename, use all caps, and avoid anything other than A-Z,0-9, and underscore in the file name. Use only three characters in the extension (AVI, SRT) and don't use more than one period.

safe:
FILENAME.AVI
FILENAME.SRT
FILE_1.AVI
FILE_1.SRT

unsafe:
Long name with spaces.avi
bad.name.avi
bad-7$@(%).avi
short.divx

[bilbom]

Okay, thanks, i try that!

Btw, do you know an answer on my question about the bitrate problem, so i understand the program ffmpegX beter?

Example:

original file = 700 mb
if i caclculate the file with best = +- 1200 KB
if i calculate the file with img = +- 4000 KB

Whats the difference?

[/img]

[jagabo]

I don't use ffmpegX but most programs that do that sort of bitrate calculation simply use a fixed relationship between frame size, frame rate, and bitrate. They are not sensitive to the quality of the source or nature of the particular video.

If you keep the same frame size, the same frame rate, the same encoder, and use a 2-pass encode with the same, or sligthly higher, bitrate you will end up with a file similar in quality. But note, every time you reencode with lossy codecs you lose quality.

[Case]

What do i have to do for the highest video quality possibele (the file size doens't matter)?

Qmin=Qmax=2. This lets the encoder ignore the bitrate setting and use a constant quantizer at high quality, and use whatever bitrate it needs to get that quality (signal-to-noise ratio).

[bilbom]

Qmin=Qmax=2. This lets the encoder ignore the bitrate setting and use a constant quantizer at high quality, and use whatever bitrate it needs to get that quality (signal-to-noise ratio).

Thanks, that was what i looking for!!

my configuration was Qmin= 10 and Qmax= 31!!