Yup, that's a classic issue; you can end up accidentally using ancient libraries without even realizing it.
Also, 67-68 isn't particularly recent; the latest "stable" would probably be r1318 aka fe83a906ee aka Core 78. You can try trunk as well, but we're having some miscompilation issues with the latest improvements, so I wouldn't trust it for production use yet.
Another note is to check your settings; a lot of people have all sorts of weird encoding commandlines (you included, given the contents of the string I pasted above) from the days when x264's setting system was baroque and confusing. Now the defaults are good and there's some nice automatic presets that let you easily pick a tradeoff of time vs. quality (see x264 --help), so you don't have to mess with weird options.
Do you have a link to a good "getting started" article written for a desktop user? (someone looking to encode nice looking videos, not build an encoding infrastructure)
This seems like an issue with a great deal of nuance, and I'd find such a resource invaluable.
For a normal desktop user, you should try one of the many encoding GUIs available.
I'd recommend Staxrip, Ripbot264, or Handbrake; all are relatively simple GUIs built around x264. For Handbrake, make sure you get the latest snapshot (the last release, 0.9.3, is very outdated).
Also, 67-68 isn't particularly recent; the latest "stable" would probably be r1318 aka fe83a906ee aka Core 78. You can try trunk as well, but we're having some miscompilation issues with the latest improvements, so I wouldn't trust it for production use yet.
Another note is to check your settings; a lot of people have all sorts of weird encoding commandlines (you included, given the contents of the string I pasted above) from the days when x264's setting system was baroque and confusing. Now the defaults are good and there's some nice automatic presets that let you easily pick a tradeoff of time vs. quality (see x264 --help), so you don't have to mess with weird options.