> And how do I check/do this?
Watch the CPU usage. If it peaks at 100% you will lose video until the next keyframe. If when idle, your machine can not play H.264 videos without dropped frames, you need to "acquire" the paid version of CoreAVC decoder. For most videos ffdshow included in CCCP will do fine.
I agree with Adicoto. You need to replace Haali splitter with
Gabest's Matroska splitter. It is simpler and does not conflict with BSPlayer. Since Gabest is inactive for about a year now it does not support the newest changes in Matroska format, but you will probably not encounter unplayable files.
To install Gabest's splitter, you unpack one *.ax file to a directory of your choice and memorize the full path, such as: "c:\apps\directshow\MatroskaSplitter.ax". Then open Start -> Run and type "
regsvr32.exe c:\apps\directshow\MatroskaSplitter.ax" to register the filter. Choose Release Unicode, if you're running Win2k/XP, or Release, if you're using or plan to use Win98.
Adicoto :: Only low quality files, like anime fansubs, have AAC audio. HD captures use either the broadcast 384 kBit/s AC-3 or matching synced AC-3 from a DVD release. And btw, the OP didn't complain about missing audio.