[FFmpeg-user] libx264 2 pass encoding...

[Jonathan Tanant]

Le 11 oct. 2011 à 12:08, John Doe a écrit :

> From: Andy Sheen <sheen.andy at googlemail.com>
> 
>> John Doe wrote on Tue 11 Oct at 10:06 UK time
>>> I am debugging my old command lines and I bumped into an x264 2 pass 
>>> problem:"[libx264 @ 0x1ccd460] constant rate-factor is incompatible with 
>>> 2pass."
>>> I understand that lossless presets won't work.
>>> I tried the ipod presets... same.
>>> I did not find any *pass presets files...
>>> I only got: libvpx-*, libx264-ipod* and libx264-lossless* presets.
>>> I tried no presets...
>> ... -vpre slow_firstpass -vpre main ...
>> ... -vpre slow -vpre main
> 
> From: Jonathan Tanant <jonathan at free.fr>
>> ... -vpre slow_firstpass -vpre ipod640 ...
>> ... -vpre slow -vpre ipod640 ...
> 
> Thanks for your replies.
> The problem is that:
>   File for preset 'slow' not found
>   File for preset 'slow_firstpass' not found
> From ffmpeg source:
>   $ ls ffmpeg/ffpresets/
>   libvpx-1080p.ffpreset
>   libvpx-1080p50_60.ffpreset
>   libvpx-360p.ffpreset
>   libvpx-720p.ffpreset
>   libvpx-720p50_60.ffpreset
>   libx264-ipod320.ffpreset
>   libx264-ipod640.ffpreset
>   libx264-lossless_fast.ffpreset
>   libx264-lossless_max.ffpreset
>   libx264-lossless_medium.ffpreset
>   libx264-lossless_slow.ffpreset
>   libx264-lossless_slower.ffpreset
>   libx264-lossless_ultrafast.ffpreset
> 
> Any idea from where I could get these presets...?

Sorry, I don't know, I just got them "out from the box".
FFmpeg 0.6, compiled from the sources on Aug 9 2010.

================================================
FFmpeg version 0.6, Copyright (c) 2000-2010 the FFmpeg developers
  built on Aug  9 2010 14:35:37 with gcc 4.2.1 (Apple Inc. build 5664)
  configuration: --prefix=/opt/local --enable-gpl --enable-postproc --enable-swscale --enable-avfilter --enable-avfilter-lavf --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libdirac --enable-libschroedinger --enable-libfaac --enable-libfaad --enable-libxvid --enable-libx264 --enable-libvpx --enable-libspeex --enable-nonfree --mandir=/opt/local/share/man --enable-shared --enable-pthreads --disable-indevs --cc=/usr/bin/gcc-4.2 --arch=x86_64
  libavutil     50.15. 1 / 50.15. 1
  libavcodec    52.72. 2 / 52.72. 2
  libavformat   52.64. 2 / 52.64. 2
  libavdevice   52. 2. 0 / 52. 2. 0
  libavfilter    1.19. 0 /  1.19. 0
  libswscale     1.11. 0 /  1.11. 0
  libpostproc   51. 2. 0 / 51. 2. 0
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...
================================================

Jonathan.

> 
> Thx,
> JD
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