[MEncoder-users] Generating Divx/MPEG4 files from ATSC .ts files

[Philip Prindeville]

I have some HD (1080i) streams that I captured using pchdtvr... And
I'm wondering how I can (a) crop the non-display 8 lines (not sure what
these are for... possibly closed captions), and (b) deinterlace the content.

Oh, and if there is line-21 old-fashioned NTSC style captions, I'd like
to strip them, convert them to DTV-style captions, and re-insert them
into the stream.

Any idea how to do all of this as a 2- or 3-pass script?  I've tried the
following,
but it doesn't seem to work.  No idea why.  It still is de-interlaced,
for instance.

Thanks,

-Philip


#!/bin/sh

x() {
  echo "$@"
  $@
}

bitrate=20000000

for file in "$@"; do
  dir=`dirname $file`
  base=`basename $file .ts`

  prog=`echo $base | sed 's/.*\.\([0-9]\)$/\1/'`
  base=`echo $base | sed "s/\.$prog$//"`

  base="$dir/$base"

  for pass in 1 2; do
    echo ""
    echo "pass $pass..."
    echo ""
    x mencoder -quiet -sws 2 -oac copy -ovc lavc \
        -lavcopts vcodec=mpeg4:vbitrate=$bitrate:vpass=$pass:autoaspect \
        -vf crop=1920:1080,scale=1920:1080,pp=hb/vb/dr/al/lb \
        -tsprog $prog \
        -o "$base.avi" "$file"

  done

done