I am contemplating purchasing a Sony HXR-NX100 and am wondering if Vegas Pro 11 (which I currently use) will handle XAV-S? From Googling it, it looks like I might need a 3rd party app to convert. Your thoughts? I should add that I am also considering a Canon XA-30. I shoot a lot of low light events and want the one that will do the best there (Weddings, dance recitals).
I would prefer the NX100 over the XA-30. The 1" chip and bigger lens diameter will give you better low light ability. You can use the free Catalyst Browse to convert the XAVC-L from the NX100 to XAVC-Intra which should be fine in VP11.
"XAVC-S" is most commonly AVC/H.264 8-bit 4:2:0 LongGOP video and PCM audio in an MP4 file. So the question is can VP11 handle that. I don't have VP11 to test. VP12/13 can output an XAVC-S file if you can get a sample file from someone to do a test. Or something else that can output XAVC-S.
"XAVC" is typically contained in an MXF file and may be 4:2:2 and Intra or LongGOP and possible higher bitrates among other things.
The camera spec says it outputs 4:2:0 and PCM audio.
You should also consider to upgrade of Vegas, since Vegas 11 is outdated in terms of the later codecs XAVC-I/S/L. Sure you can use the Catalyst to transcode the files, but maybe a better workflow would be to upgrade Vegas and edit the files without transcoding. The requirement for transcoding may also depend from the performance of your PC, since some of these codecs require significant power for the playback in the timeline.
FWIW... I have the FDR-1000V and that can generate XAVC-S. Huge files in one piece, up to 100GB. (AVC files are generated in 4GB pieces for some reason). Vegas Pro 13 imports this stuff fine. I can't test v11 for you though.