Use MP4Box instead of qt-faststart
Code:
/usr/bin/MP4Box -inter 0 <video_file>
There is a windows version
here.
It's not just "mp4". It should be h.264 encoded video in an mp4 container.
Code:
/usr/bin/ffmpeg -y -i <input_video> -vf scale='640:trunc(ow/a/2)*2' -acodec libfaac -ab 256k -ac 2 -ar 44100 -vcodec libx264 -fpre <path_to_presets>/presets/libx264-lossless_slow.ffpreset -crf 22 -threads 0 -f mp4 <output_video>