FFDShow Beta4

经过将近半年的等待，ffdshow-tryouts 刚刚又更新到 beta4
* In FLAC and TTA, A/V synch was lost.
* Closed caption decoder produced garbled characters.
* Crashes in Windows Movie Maker have been fixed. This was not ffdshow's bug.
* Subtitles that contain an "&" as part of the filename were displayed incorrectly inside ffdshow's context menu.
* MakeAVIS.exe in "Store uncompressed audio" mode produced noisy audio if the input audio was not 16bit integer.
* If the AviSynth script had multiple lines, the script was not saved by using "Export all settings" or "Save to file..." in Presets page.
* DTS S/PDIF pass-through sometimes had terrible noise.
* Compatibility problem with VFW encoder applications such as HyperCam has been fixed.
* If ConvertToRGB was used in AviSynth script, the video was flipped.
* If "Swap channels" was used, audio was lost if the number of channels of the input stream changed.
* DVD menu was sometimes not highlighted.
* "Preset autoload conditions" -> "on movie file name match (with wildcards)" did not work.
* If the input color space was NV12 or NV21, ffdshow could not render properly.
* If crop was used after letterbox subtitling, the bottom of the image was cropped too much.