Transcoding option to resize video

As I understand it there's no option to specify size (-s) for ffmpeg from a transcoding profile. Are there technical reasons for this, or is it possible to add a "size" attribute?

It would be most useful to be able to do the resizing on the server instead of sending full HD to a low powered mobile for instance.

I find with the HTC Desire that I can play 720p with a bitrate up to about 4000k, but the phone can't handle 1080i even if I set maxVBitrate as low as possible.
Resizing the files to the Desire's native resolution of 800x480 they play perfect with a bitrate of 10000k.

[will]

Not at the moment, but I think it might be in the next big release. For now, a hacky way to do it would be to have an ffmpeg wrapper (bash/perl script), that looks for something unique to your phone's profile in the arguments, e.g. whatever maxVBitrate is turned into combined with 10000K, and add -s 800x480 to the list of arguments before calling ffmpeg. Here is an example perl one for fixing aspect ratio on some tvs viewtopic.php?f=11&t=2956&p=34000&p34000#p34000 or viewtopic.php?f=5&t=5806 shows one for dropping the volume of online feeds from 4oD, and it then also shows replacing the audio codec.

Excellent, I'll go with the shellscript for now

Just testing the following and it looks promising

  Code:

gong:/usr/local/bin# cat ffwrap.sh
#!/bin/sh

trap "exit 1" 0 1 2 15

while [ "$1" != "-y" ]
do
   case  $1 in
      -i) ;;
       *) n="$n $1";;
   esac
   shift
done

n=$(echo $n|sed -e 's/^ //')
/usr/local/bin/ffmpeg -i "$n" 2>&1 | grep -q -E '(1920x1080|1280x720)'
test $? -eq 0 && s="-s 800x480"
logger -p local1.info -t ffwrap "transcoder called with -i \"$n\" $s $@"
/usr/local/bin/ffmpeg -i "$n" $s $@
r=$?
logger -p local1.info -t ffwrap "transcoder done, status $r"
exit $r