File types: So far exporting H264, MPeg4, DV HDV does not work, I haven't tested may others. Audio always works, so I've been disabling that option for testing. Specifically what settings? Lots of em, any of them. I've done about a dozen tests with each different format. Sizes, settings all different.
Are these "target" compression formats? (I.e., H.264 and MPEG4 are video compression formats—not file types and you state in the next paragraph that you are converting from H.264 content. Also wanted details regarding your specific workflow for one specific conversion attempt—not generalities. Are you using QT 7 Pro, FCP, Compressor, etc? Which app option? Etc., etc., etc.
What file type am I converting from? H264, so far. I can try others. although I can play the files just fine...
Once again, I was looking for specific information regarding a specific source file giving you problems. H.264 could refer to anything from Blu-ray 1920x1080 MPEG-4 AVC, High@L4.2 , CABAC, 22.6 Mbps content in an MKV file to a Flash MP4 file downloaded from the Internet.
I am not trying to multiplex at all, just convert H264, ideally to DV (or HDV)
The term "multiplexing" can also refer to the process of storing or wrapping various data formats in a file container. For instance. H.264/AAC/AC3/Text tracks can easily be wrapped to MOV or M4V file containers but QT would have a problem with MP4 files containing such data if created by a third-party app or if the extension were modified at the Finder level by a user.
Basically, all of the formats you mentioned are supported under Mountain Lion with "pro" apps and codecs properly installed assuming the source files are not corrupted and you don't have any conflicts preventing the proper use of your software.
