yes H264 is completely broken in releases after 0.6.2b (0.5 to 0.6.2b work with H264 without audio or with different audio). But H264 isnt the only codec that doesnt work, Lots of more codecs dont work like Snow, Theora, MSU and lots of other codecs (although some of them arnt supported by ffmpeg anyway but Snow and Theora are) and there are also some audio codecs that crash as well like AAC seems to crash the program and so do other variations like flaac and Apple lossless etc. I spent around 9 days working on different codecs and encoders and have found that so far Xvid, H263+ and Sorenson are currently the best codecs for encoding the videos with compression (a few lossless codecs do work but the comparisson isnt even worth talking about since you would end up with a 350mb+ opening alone) until H264 is supported, Also i did managed to once get X264 working with the latest driver but the things i had to do to get it working seemed to be random and the quality sucked but the video did work which was kind of strange and it wouldnt work with audio either.