what kind of file x264 support

[yinhuichina]

i want to read buffer from a file then encode it with x264 but i do not know what kind of file the x264 need ,and when the encode completed what kind of file should i store them thank you

[paradoxical]

Syntax: x264 [options] -o outfile infile

Infile can be raw (in which case resolution is required),
or YUV4MPEG (*.y4m),
or Avisynth if compiled with support (yes).
or libav* formats if compiled with lavf support (yes) or ffms support (yes).

Directly from the help text.