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x264 Lossless question

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Hi, good day. I was wondering if is safe to use x264 lossless, and is comparable to Lagarith. I mean, if I reencode this x264 lossless to x264 lossy, it's the same as to reencode a Lagarith to a x264 lossy? And, should I be using CoreAVC or libavcodec to decode this lossless through DSS2()? These question had been retaining my sleep these days, so I would be very gratefull if they could be answered :) Thanks.

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MTN 06 Porsche Cayman S/MT - Atlas Grey 08 RS4 - Ibis White 06 M3 Convertible/MT - Alpine white

MTN

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Registration: 07.09.2003
07.05.24 - 04:53:35
Message # 1
RE: x264 Lossless question

x264 lossless has pretty much strictly superior compression to Lagarith, even in intra-only mode IIRC. Unlike Lagarith, it only supports the YV12 colorspace. To decode it correctly, you need a libavcodec from within the past ~2-3 weeks (as that's when support was added) or CoreAVC 1.8.5.

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DeezBMW

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Registration: 03.14.2001
07.05.24 - 04:56:57
Message # 2
RE: x264 Lossless question

How to encode to lossless?

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///Mink

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Registration: 08.21.2001
07.05.24 - 05:02:28
Message # 3
RE: x264 Lossless question

Atak_Snajpera, huh? --qp 0 is that what you mean? stpdrgstr, lossless is lossless, the input to "x264 lossy" in both cases should be the same.

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James

MaDoX

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Registration: 09.27.2001
07.05.24 - 05:07:49
Message # 4
RE: x264 Lossless question

Thank you very much. Now I can keep encoding at ease :)

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The M stands for Move.

OldM3

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Registration: 03.10.2003
07.05.24 - 05:14:39
Message # 5
RE: x264 Lossless question

Note that for frame-accurate access to H.264 streams (lossless or not) you should use DGAVCIndex/AVCSource() instead of DirectShow. I'm not sure whether AVCSource() already has an updated libavcodec with support for x264 lossless mode though...

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Ac Schnitzer

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Registration: 05.29.2002
07.05.24 - 05:18:47
Message # 6
RE: x264 Lossless question

i thought the h.264 spec declared that predictive lossless profile was to only consist of IDR frames? Edit: nope, confirmed against the spec... it does allow I,P,B. what's the point of allowing B frames in the first place if it reduces the compression?

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wmarcel

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Registration: 09.01.2003
07.05.24 - 05:26:29
Message # 7
RE: x264 Lossless question

I created streams with x264's mode "predictive lossless" mode using P-Frames and even B-Frames (didn't know b-frames are bad for lossless) and CoreAVC as well as recent ffdshow do handle it properly.

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michaelgvh

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Registration: 03.15.2003
07.05.24 - 05:31:47
Message # 8
RE: x264 Lossless question

so what's a sensible command line for lossless?

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nikkis34

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Registration: 01.12.2003
07.05.24 - 05:38:14
Message # 9
RE: x264 Lossless question

no --subme 9 for Slowest ? typo or is there actually something to it ?

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Shawn323iC

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Registration: 08.14.2001
07.05.24 - 05:48:25
Message # 10
RE: x264 Lossless question
Disk full problems???? HELP : Previous topic
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