AviSynth - Add specific Chapters timecodes to your script

[imager]

Trying to add Chapters in my AVS scripts for final MKV output.
My script contains multiple clips (amalgamation of video clips, and pictures).

I would like to put a Chapter start at beginning of each my clip.

ShowSMPTE will Timecodes in video, but not to an external text file like chapters.txt.

My normal route is x264 for .264 and faac/neroAacEnc for .aac or wav(vdub) to ac3 (eac3to), to using mkvmerge for MKV with chapters.

I don't mind doing another pass on my .AVS as I am doing second pass for Audio already. This pass should create a text file compatible with mkvmerge with my specified timecodes.

Pseudo code:

v1 = AviSource("FirstBD.avi")
v1t = blank(200).Subtitle("First Birthday")
chv1 = ? # Chapter 1 timecode
v2 = AviSource("SecondBD.avi")
v1t = blank(200).Subtitle("Second Birthday")
chv2 = ? # Chapter 2 timecode
v3 = AviSource("ThirdBD.avi")
v1t = blank(200).Subtitle("Third Birthday")
chv3 = ? # Chapter 3 timecode

return chv1 ++ v1 ++ v1t ++ chv2 ++ v2 ++ v2t ++ chv3 ++ v3 ++ v3t

[AlanHK]

The title cards are easy enough:

AviSource("FirstBD.avi") ++\
BlankClip(last,200).Subtitle ("First Birthday", align=8, size=36,  font="georgia") ++\
... etc

See http://avisynth.org/mediawiki/Subtitle for formatting.

As for the chapter timecodes, should be do-able with WriteFile

http://avisynth.org/mediawiki/WriteFile
WriteFile evaluates each expressionN, converts the result to a string and puts the concatenated results into a file, followed by a newline.
The "run-time" variable current_frame is set so that you can use it in an expression

[Gavino]

Perhaps something based on the techniques used in this thread will do what you want:
http://forum.doom9.org/showthread.php?t=138229