How to improve MPlayer speed, esp on Sam440

I was trying to help get MPlayer playing YouTube videos better (via SMTube) on someone's Sam440. Even with 360p videos the audio/video was getting out of sync... but eventually I got it working well (audio+video in sync!). In case it helps anyone else, here's some hints as to what I had to do:

First, video has to be set to "p96_pip". (This doesn't, or didn't, work on my X1000, but it does work on the Sam440 with OS4.1FE, and is definitely better than "cgx_wpa".)

Second, although I didn't test it, I suspect setting audio to "ahi" will be better than "ahi_dev". (Again, that doesn't work on my X1000, but does on the Sam440.)

And finally, the magic command line option to run MPlayer with is this:
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BTW, to get MPlayer to work at all, you may need some or all of these command line options:
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(Some of these might not be needed by MUI-Mplayer, if you set them in it's Settings window.)

An alternative to command line options is to edit MPlayer's "conf/config" file. In that case the "magic" option should appear like this on it's own line:
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As well as:
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If you are using SMTube (recommended), then you need to edit the "SMTube/Amiga/PlayVideo.rexx" file. The command line options should be put into the MPLAYER_OPTIONS line. I don't know why it doesn't come with any sensible options by default, but there you go...

@ChrisH
Thanks Chris. I tested today.

Yes, I already use all these commands since years for MPlayer (and SMTube). But it would be better to improve p96 video output.

Unfortunately only Joerg made a partial (and great) work on this specific topic and never managed to finish it.

skiploopfilters is indeed fast but also ugly with many macroblocs on the videos.

@K-L Quote:
Does it? Hmm, I better remove that option from my MPlayer, now that I use X1000... (Then again maybe not - it may allow me to run higher resolution...)

@ChrisH The speed gain is quite small for HD. Maybe it's much bigger for higher amount of pixels.