1. I don't see any crashes in the log file
2. I noticed you're using an old version of MCEBuddy 2.3.12 which has bugs in it for handling large volumes of files and data which makes the GUI unresponsive and engine slow. There is a new architecture in 2.3.13 for handling large volume which
makes the GUI more responsive and engine faster. I would suggest upgrade to the latest BETA and it would solve your problem.
Coming to the profie, I don't understand what you're trying to do, here is a simple profile that comes with MCEbuddy with a constant bitrate and fixed resolution. You can customize the same for your own requirements. this one is ffmepg based with
960 width, auto cropping and 2500k bitrate. Similarly you write a custom profile using handbrake (you will need to know how to write handbrake paramters but it looks like you do) and you're good to go. Remove the 2ChannelAudio if you want multi channel audio,
change the aac to ac3 codec (see other profile samples).
[iPhone Hi-Res]
Description=iPhone 4,4S,5 compatible (H.264 MP4 width 960 pixel video and AAC stereo audio).
order=ffmpeg
ffmpeg-general=-threads 0
ffmpeg-video=-ss 3 -vf yadif=0:-1,hqdn3d,crop=iw:ih:0:0,scale=min(960\,iw):trunc(ow/dar/2)*2 -vcodec libx264 -b 2500k -x264opts ref=6:subq=6:subme=7:qcomp=0.8:b-pyramid=strict:no-weightb=0:me=umh:direct=auto:level=3:partitions=p8x8i4x4:no-cabac=1:trellis=1:no-dct-decimate=1:threads=auto
ffmpeg-audio=-acodec aac -ab 160k -strict experimental -cutoff 15000
ffmpeg-audioac3=-acodec aac -ab 160k -strict experimental -cutoff 15000
ffmpeg-ext=.mp4
ffmpeg-audiodelay=skip
2ChannelAudio=true
FixedResolution=true
PreConversionCommercialRemover=true
