Command Line avi bitrate calculator

[M3mbr4n3]

Hello,

I'm looking for a cli avi bitrate calculator that I can include in my bat scripts.

Please don't point me at GUI clients as they are no use for me at all..


I would like to be able to include the size of a VBR MP3 to calculate the bitrate

[freebird73717]

I've honestly never seen a cli bitrate calculator. It's an interesting concept. Give the exe some parameters like -h for hours , -m for minutes, -a for audio, and -s for size in MB. That would then output the videos bitrate to stdout. It's certainly possible.

How would you plan to integrate something like this into a bat script? Post an example script if possible

[M3mbr4n3]

Well I know for a fact that mencoder can encode to a given filesize using bitrate=-value


bitrate=value would use the give number as bitrate
bitrate=-value would try to encode to a given filesize


I've already compiled the python script by Marc Rintsch and converted it to an exe file using py2exe

http://bj.spline.de/bitrate-man.html





Using mediainfo.exe (cli) I can parse some usefull information like framerate, amount of frames, duration, etc and use them in my bat:

bitrate.exe -f %framerate% -o 0.19 -t %4 %timecode% "%demuxedaudiopath%" > %2\bitrate.log



This script is actually not very accurate so i'm looking into a replacement..




Too bad this guy's script is unfindeable:

http://forum.doom9.org/archive/index.php/t-86634.html

[freebird73717]

You could log into doom9 and send a pm to the guy to ask if he still has the code and see if he responds

[M3mbr4n3]

Ofcourse I already did that hehe

[intracube]

Using mediainfo.exe (cli) I can parse some usefull information like framerate, amount of frames, duration, etc and use them in my bat

mediainfo (cli) can return a huge number of values, including:
- total bitrate
- video bitrate
- audio bitrate
etc

For example:
mediainfo --Inform="General;%OverallBitRate%" inception_trailer.mp4
returns:
2879058
the overall bitrate in bits per second.

mediainfo --Info-Parameters
returns a list of available options

[M3mbr4n3]

Correct, but you don't understand my question.

I want to convert MPG to AVI using the xvid codec.


Given the fact that I want to encode to a specific filesize I need to calculate the bitrate.


Right now i'm using mencoder to encode to a specific size like I said before.

- First I demux my mp2 audio file from the mpeg using dgindex.
- then convert the mp2 to mp3 using lame
- parse the filesize of the mp3
- VIDEO + AUDIO + OVERHEAD = AVI

X + 45MB + (amount of frames of mpg * 25 bytes) = 358400kb

But I want to switch to a ffmpeg build with Multithreading to encode faster. But unfortunately ffmpeg cannot encode to a given filesize. It only accepts a bitrate value..

[jagabo]

Windows CLI built in calculator: http://labnol.blogspot.com/2006/05/set-dos-command-line-calculator.html
Linux has bc: http://linux.about.com/od/commands/l/blcmdl1_bc.htm

Though I don't know why anyone bothers with bitrate based encoding with Xvid anymore.

[M3mbr4n3]

Windows CLI built in calculator: http://labnol.blogspot.com/2006/05/set-dos-command-line-calculator.html
Linux has bc: http://linux.about.com/od/commands/l/blcmdl1_bc.htm

Though I don't know why anyone bothers with bitrate based encoding with Xvid anymore.

I know how to calculate, that's not my problem dear jagabo.


Please stick to my question.

[jagabo]

Windows CLI built in calculator: http://labnol.blogspot.com/2006/05/set-dos-command-line-calculator.html
Linux has bc: http://linux.about.com/od/commands/l/blcmdl1_bc.htm

Though I don't know why anyone bothers with bitrate based encoding with Xvid anymore.

I know how to calculate

Then just download the source to any of the open source bitrate calculators and fine tune the equations to account for the idiosyncrasies of mencoder.