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ini
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ppmmpeg
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1996-07-11
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;; ppmmpeg.ini - Create an MPEG file.
;;
;; URL: http://student.uq.edu.au/~s002434/mpeg.html
;;
;; Author:
;; Version 1.1
;; Fixed for >9 frame animations
;; Warwick Allison (warwick@cs.uq.edu.au)
;; 23 March 1996
;; Version 1.0
;; Initial version - as posted to comp.graphics.raytracing.rendering
;; Warwick Allison (warwick@cs.uq.edu.au)
;; 21 March 1996
;;
;; Sample usage (myfile.ini):
;; ;; My animation
;; ppmmpeg.ini
;; Width=160
;; Height=160
;; Input_File_Name=myfile.pov ;; myfile.pov assumes "clock" from 0.0 to 1.0
;; Final_frame=20
;; Cyclic_Animation=true
;;
;; Environment:
;; POV_MPEGOPTS - Additional arguments to pass to mpeg encoder
;; eg. To ask encoder to produce a 1000 bps file:
;; POV_MPEGOPTS="-r 1000" povray myfile.ini
;; eg. To ask encoder to produce a 8192 bit (1K) file:
;; POV_MPEGOPTS="-x 8192" povray myfile.ini
;; Read the manual for mpeg for more information.
;;
;; Disk usage:
;; Each frame traced generates a .Y, .U, and .V file in a subdirectory
;; called <scenename>-frames. The total size of these files is 1.5 bytes
;; for each pixel in the frame (because there is one byte of luminance
;; per pixel and 1 byte of U and V per 4-pixels).
;;
;; For example, a 320x240 frame will create three files totalling 115200
;; bytes, and a 100 frame animation would thus use about 11.5Mbytes prior
;; to MPEG compression.
;;
;; If you are rendering extremely large animations, or are very short on
;; disk space, you could modify the (free) Stanford encoder such that it
;; could support reading compressed (gzipped) files, then you could add
;; a compression command (gzip %s%n.[YUV]) to the Post_Frame_Command.
;;
;; Required Unix commands:
;; rm, expr, etc. - Standard Unix
;; ppmtoyuvsplit - Standard NetPPM
;; mpeg - Stanford MPEG encoder/decoder
;; havefun.stanford.edu:pub/mpeg/MPEGv1.2.tar.Z
;;
;; PPM output
Output_to_File=On
Output_File_Type=p
;; Ensure frames directory is created
Pre_Frame_Command=mkdir -p %s-frames
Pre_Frame_Return=
;; After frame, split PPM file into Y,U,V files, then delete PPM
;; Remove leading 0s from frame number.
Post_Frame_Command=ppmtoyuvsplit %s-frames/`expr %n + 0` %o && rm %o
;; If error, crash
Post_Frame_Return=f
;; Nothing special prior to scene
Pre_Scene_Command=
Pre_Scene_Return=
;; After scene, generate mpeg file. Note that current frame is 1 more than
;; final frame number, so we subtract 1 using expr. $POV_MPEGOPTS can be
;; set to give additional options to the mpeg encoder.
;;
Post_Scene_Command=mpeg -PF -h %w -v %h -a 1 -b $(expr %n - 1) %s-frames/ -s %s.mpeg $POV_MPEGOPTS
;;If error, crash
Post_Scene_Return=f
;; Don't pause if displaying!
Pause_When_Done=Off
Continue_Trace=On ;;Lets you resume