> - Added -S option to ppmtoy4m call in example image convert script. Suggested
> by
> Thorsten Gehrig.
I was thinking of something more like this for backwards compatibility:
@@ -61,17 +61,23 @@
#
# now run the conversion
#
+
+# 'chroma subsampling mode' mjpegtools >= 1.8.0
+if ppmtoy4m -h | egrep -q "'420mpeg2'" ; then
+ SUBSAMPLINGMODE="-S 420mpeg2"
+fi
+
if [ "$FORMAT" = "ntsc" ]; then
pnmscale $S $TMP | \
pnmpad -black -width 704 -height 480 | \
ppmntsc | \
- ppmtoy4m -S 420mpeg2 -v 0 -n 1 -r -F 30000:1001 | \
+ ppmtoy4m -v 0 -n 1 -r -F 30000:1001 $SUBSAMPLINGMODE | \
mpeg2enc -f 7 -T 90 -F 4 -nn -a 2 -v 0 -o "$MPG"
else
pnmscale $S $TMP | \
pnmpad -black -width 704 -height 576 | \
ppmntsc --pal | \
- ppmtoy4m -S 420mpeg2 -v 0 -n 1 -r -F 25:1 | \
+ ppmtoy4m -v 0 -n 1 -r -F 25:1 $SUBSAMPLINGMODE | \
mpeg2enc -f 7 -T 90 -F 3 -np -a 2 -v 0 -o "$MPG"
fi
#
Best Regards.
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