Re: [MEncoder-users] Mencoder params

John Doe <jdmls@yahoo.com> writes:

> And, for a mp4 version:
>
> mencoder "$INPUT" -o /dev/null -really-quiet -demuxer 35
> -of lavf -lavfopts format=mp4
> -oac faac -faacopts mpeg=4:object=2:raw:br=96 -srate 44100
> -ovc x264 -x264encopts bitrate=2000:vqscale=5:me=dia:keyint=125:trellis=1:global_header:turbo=1:pass=1
> -sws 0 -vf harddup
>
> mencoder "$INPUT" -o "$OUTPUT" -really-quiet -demuxer 35
> -of lavf -lavfopts format=mp4
> -oac faac -faacopts mpeg=4:object=2:raw:br=96 -srate 44100
> -ovc x264 -x264encopts bitrate=2000:vqscale=5:me=umh:keyint=125:trellis=1:global_header:pass=2
> -sws 2 -vf harddup

(1) You don't need to encode audio on the first pass. To save cpu
cycles, rather use -oac copy

(2) last time I checked, lavf mp4 muxing was broken, although I don't
recall right now the exact issues it had.
Either way, most ppl including me use mp4box for muxing. You can
for example first encode both streams into avi (default), then
dump both streams and remux

(3) -sws isn't really needed as long as you don't scale the video

(4) "raw" in faacopts prevents remuxing and doesn't have any obvious
advantage; I wonder how you came up with this

(5) if you aim for (hard/software) playback compatibility, your x264
encoding options do matter; your's seem kind of arbitrary, I
recommend checking out the MeGUI profiles (needs Windows though)
for quicktime/ps3/xbox/whatever compatible profiles

(6) faac generally isn't that great an encoder; I currently use nero,
which isn't open source but "free as in beer" and runs on linux

Apart from those, your options should be OK for PAL (resp. not
otherwise interlaced or telecined) video exclusively. You might want
to ask yourself though what the pressing reason exactly is for
resampling the audio to 41kHz.
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