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...This way the DirectShow filter for Windows Mobile (based on > libFLAC) will > also benefit from those optimizations. When Rockbox switched from libFLAC to the ffmpeg decoder, FLAC turned from one of our slowest codecs, to the fastest. The difference was extremely dramatic. libFLAC is the _reference_ implementation of FLAC, not one that is designed to be the ideal decoder everywhere. That's the advantage of open codecs - the specification is public, and third-party encoders/decoders should be encouraged, not immediately rejected without consideration. I'm not talking about things...

Thanks for the info, Dave. Speed is a very important feature, but there might be some risk choosing the FFmpeg decoder. They've had trouble with their encoder in the past, which tells me it's possible your users might one day run into a valid FLAC that the FFmpeg decoder won't handle correctly. A better suggestion might be to start with libFLAC, optimize as needed, and