Manual --slow-firstpass

[desta]

Before I start, I realise the answer is probably very obvious, but I'm behind on sleep at the moment and have myself a bit confused, so please don't shoot me down for my stupidity...

I'm doing a two pass encode, with each pass done manually. My first pass is a --slow-firstpass and I realise this overides the defaults set by --pass 1 (--trellis 0 --partitions none --no-8x8dct --me dia --ref 1 --subme 2).

Does this mean that --slow-firstpass will set the general x264 defaults?

ie... --trellis 1 --partitions p8x8,b8x8,i8x8,i4x4 --8x8dct --me hex --ref 3 --mixed-refs --subme 7

.. in fact, does --slow-firstpass mean all x264 settings go to default unless explicitly changed?

[Keiyakusha]

by default x264 lovers some settings on 1st pass. With --slow-firstpass it doesn't do so. All is simple as that.
By setting --slow-firstpass your settings do not go anywhere, they simply unchanged.

[desta]

Yeah, I realise that, but I'm doing a manual 2 pass encode, not an automated 2 pass -- There are no settings being handed over from a 2nd pass. So I'm asking what settings become the default for a manual slow firstpass.

[Dark Shikari]

Yeah, I realise that, but I'm doing a manual 2 pass encode, not an automated 2 pass -- There are no settings being handed over from a 2nd pass. So I'm asking what settings become the default for a manual slow firstpass.There is no such thing as an "automated 2-pass" in x264. If you're talking about some particular GUI, this isn't the right forum for such a question.

[desta]

There is no such thing as an "automated 2-pass" in x264. If you're talking about some particular GUI, this isn't the right forum for such a question.
I was under the impression that using any --preset along with --bitrate will result in a 2 pass encode? is that not considered automated then?

[thewebchat]

Uh, no, that would result in a 1-pass ABR encode. Come on, a 2pass example is even given in the help message.

[desta]

Ah yeah.... :s

Before I start, I realise the answer is probably very obvious, but I'm behind on sleep at the moment and have myself a bit confused, so please don't shoot me down for my stupidity...

Regardless though, and going back to my original unanswered question....

Does this mean that --slow-firstpass will set the general x264 defaults?

ie... --trellis 1 --partitions p8x8,b8x8,i8x8,i4x4 --8x8dct --me hex --ref 3 --mixed-refs --subme 7

.. in fact, does --slow-firstpass mean all x264 settings go to default unless explicitly changed?


p.s. Like I said already, I know this is likely extremely obvious, but I haven't had a great amount of sleep and am functioning on reserve at the mo, so please take it easy.

[J_Darnley]

No, no. Would you find the source code easier to understand? Setting --slow-firstpass will stop x264 from: using fast settings on the first pass; changing options you set; overriding what you told it to do.

[desta]

No, no. Would you find the source code easier to understand? Setting --slow-firstpass will stop x264 from: using fast settings on the first pass; changing options you set; overriding what you told it to do.Thank you.