grab=capture from cam (/dev/video0 or /dev/video1) and mic and consequently encode that to an mp4/avi file.

Regarding ffmpeg I'm having stange behaviours:

ffmpeg -f alsa -ac 2 -i hw:0 -f video4linux2 -i /dev/video0 -acodec ac3 -ab 128k -vcodec mpeg4 -b 6000k -r 25 test5.avi

ffmpeg -f alsa -ac 2 -i hw:0 -f video4linux2 -s 320x240 -i /dev/video0 -acodec ac3 -ab 128k -vcodec mpeg4 -b 6000k -r 25 test5.avi

ffmpeg -f alsa -ac 2 -i hw:0 -f video4linux2 -s 320x240 -i /dev/video1 -vcodec libx264 -acodec libfaac test.mp4

ffmpeg -f alsa -ac 2 -i hw:0 -f video4linux2 -s 320x240 -i /dev/video1 test.mp4


none of these produced any file and in the top of that, when /dev/video0 is specified my phone reboots.
When /dev/video1 is specified, nothing happens, I can see the front red light but no file is produced also.