fps needed in 1st pass in x264?

[Forteen88]

Hey,
Is --fps value needed in 1st pass in x264, or is setting it in 2nd pass enough? I've encoded 1st pass for 30h, and don't want to restart encoding :-P Although setting fps in mkvmerge is maybe the same?
Thanks

[rack04]

Hey,
Is --fps value needed in 1st pass in x264, or is setting it in 2nd pass enough? I've encoded 1st pass for 30h, and don't want to restart encoding :-P Although setting fps in mkvmerge is maybe the same?
Thanks

First, what is your reasoning for setting the --fps value to begin with?

[PiPPoNe92]

There isn't need to write fps, in fact x264 impost 25.00 fps in automatic in the 1st and in the 2nd pass

[buzzqw]

afaik --fps is needed only with pipe input

BHH

[LoRd_MuldeR]

I'd assume that the correct "--fps" is needed for all bitrate-based modes and for both passes, because bitrate per second highly depends on how many frames per second we have.

But as buzzqw said, you usually don't need to set the "--fps" parameter manually, unless you use pipe input. x264 reads the correct FPS from your source Avisynth script...

[Forteen88]

Ok, thanks. Source is 25 fps (mkvmerge complained last time when I didn't set --fps 25 on a 25fps-source-encode, but that might've been because I changed SAR also).

[buzzqw]

more generalized: --fps is to use for any raw source

BHH