Encode PSP video with ffmpeg from command line on mac os x

1. Install proper ffmpeg:

port install ffmpeg +gpl +lame +x264 +xvid +faac +faad

2. Create an convert.sh file:

#!/bin/sh
mkdir mp4
for file in *.avi; do
/opt/local/bin/ffmpeg -i "$file" -acodec libfaac -ab 128k -ar 48000 \
-s 368x208 -r 29.97 -vcodec libx264 -b 500kb \
-flags +loop -cmp +chroma \
-partitions +parti4x4+partp8x8+partb8x8 \
-me_method umh -subq 6 -trellis 1 \
-refs 2 -bf 1 -coder 1 -me_range 16 -g 300 -keyint_min 25 \
-sc_threshold 40 -i_qfactor 0.71 -maxrate 4M \
-bufsize 4M -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 21 \
-threads 0 "mp4/${file%%.*}.mp4"
done

3. Chmod it:

chmod 777 convert.sh

4. launch it:

./convert.sh

P.S. If you want launch conversion in foreground, just do next steps:

1. Open terminal and launch virtual console :
   screen
2. launch convertion
   ./convert.sh
3. exit virtual console
   ctrl+a, d
4. close terminal window

if you want to sneek, what happens at your virtual console open it with next command:
screen -r