Some questions about FFmpeg and H264

[Deckard2019]

1/ Is x264 the only way to produce H264 with FFmpeg ?
2/ I need to create two files (different resolution and bitrate) from one source, using 2 passes.
Could I reuse first pass stats of first encoding to create second one ?

Thank you.

[Dark Shikari]

1/ Is x264 the only way to produce H264 with FFmpeg ?Yes.
2/ I need to create two files (different resolution and bitrate) from one source, using 2 passes.
Could I reuse first pass stats of first encoding to create second one ?It would work, though it wouldn't be ideal.

[Deckard2019]

Is there a way to specify log filename for x264 ? -passlogfile is not working, I always get only "x264_2pass.log" filled.
I need to launch several ffmpeg instances and they always use the same log file for 2 pass.
Thank you.

[Snowknight26]

--stats "filename.ext"

[Deckard2019]

--stats "filename.ext"
This option is for x264 not ffmpeg. I'm afraid there's no equivalent for this with ffmpeg.

[Snowknight26]

My mistake, didn't realize you were still talking about ffmpeg in your 2nd post. What's your command line? What ffmpeg revision are you using?