Mug Funky,
This document,
http://developer.apple.com/quicktime...spatch019.html has a lot of info on quicktime and yuv. There are a few ImageDescription Extensions (colr & nclc) which describe color matrixes and transfer functions. I'm muddling my way through and hoping to find something useful. I've also found that mencoder using quicktime codecs in YUY2 mode does a much better job than my filter of decoding to YUY2 with the correct color output (still not perfect and some filters seem to only work in RGB). Mencoder/mplayer uses yet another quicktime function for decoding frames (ImageCodecBandDecompress) that I have not tried yet. I'll have to look into it some more. I'm definately in agreement with morsa...Quicktime is really starting to get annoying...there are way too many functions available to decompress a frame of video (ImageCodecBandDecompress, DecompressSequenceFrameWhen, MoviesTask, DecompressImage, ICMDecompressionSessionDecodeFrame, DataCodecDecompress, FDecompressImage and probably others that I haven't found yet).
Bond,
Sorry, I remember typing (in notepad) a reply to your question about mplayer and quicktime but I guess I never actually logged on and posted it. Mplayer has a quicktime demuxer which reads the properties of the quicktime file (FourCC, height, etc.). It then has a set of codecs that it can use to decode the video. "Codecs.conf" is used to determine which codec to use for each FourCC. If you play a Sorenson Video 3 quicktime with mplayer, the demuxer will determine that the FourCC is SVQ3 and will search through "codecs.conf" for a compatible decoder. The first one listed is ffmpeg, so mplayer will grab compressed media samples from the quicktime file and feed them to the ffmpeg SVQ3 decoder. If you remove or comment out the ffmpeg decoder entry, it will try to use the next one in the list, "Win32/QuickTime SVQ3 decoder." I have not been successful using the quicktime decoders with mplayer but they seem to work with mencoder. I added an entry for Blackmagic's 10Bit codec (v210) and mencoder successfully re-encoded the file to mpeg4.
I tried "mplayer -vo directx SVQ3.mov" which crashes
and "mencoder SVQ3.mov -ovc lavc -lavcopts vcodec=mpeg4 -ffourcc XVID -o SVQ3.avi" which successfully encodes an mpeg4 avi.
As an example of a new mplayer/mencoder codec, here's the entry I added for the Blackmagic's 10Bit codec:
videocodec qtv210
info "Win32/QuickTime Blackmagic 10Bit"
status untested
fourcc v210
driver qtvideo
dll "BlackmagicCodec.qtx"
out BGR32
About h264...There are two problems there: 1) My method of returning the frame count doesn't seem to work with your sample file and always returns a value of 1. 2) It looks like I am using older APIs that cannot handle B-Frames, the error message that quicktime gives me is "kQTMediaHasDisplayOffsetsErr = -9461, /* Returned by old (non-B-frame-aware) media APIs that cannot cope with nonzero decode to display deltas on media that contain them. */." My guess is that the cyberlink filter has a similar problem.
I'll have to revert back to my first method of returning the framecount (GetMediaSampleCount) and figure out the newer quicktime 7 video APIs (ICMDecompressionSession).
hanfrunz,
Thanks for that info. I now have Blackmagic 10Bit (v210) raw decoding added in, using the 8 most significant bits.
I should hopefully have a new version available sometime in the next few days. It will add 10Bit decoding and fix the fps error. I think I may end up needing to start a new filter from scratch to clean everything up and try to get the colorspace and h264 issues resolved correctly. Right now, I just keep dumping code into the middle of an already messy project and I'm starting to get lost in it.