bicubiclin typo in www.ffmpeg.org/ffmpeg-scaler.html

[cyril]

Summary of the bug: when I try to resize using the bicubiclin algorithm, I just get an error, while others as sinc, lanczos or vanilla bicubic are working fine.

Also when trying to programmatically use SWS_BICUBLIN with sws_getCachedContext(), I get a C runtime exception.

Maybe, SWS_BICUBLIN has been removed from FFmpeg?

How to reproduce:

% ffplay -i <any video file>  -sws_flags bicubiclin
ffplay version N-61678-gd003a0c Copyright (c) 2003-2014 the FFmpeg developers
  built on Mar 21 2014 22:08:13 with gcc 4.8.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aa
cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavp
ack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable
-zlib
  libavutil      52. 67.100 / 52. 67.100
  libavcodec     55. 52.102 / 55. 52.102
  libavformat    55. 34.101 / 55. 34.101
  libavdevice    55. 11.100 / 55. 11.100
  libavfilter     4.  3.100 /  4.  3.100
  libswscale      2.  5.102 /  2.  5.102
  libswresample   0. 18.100 /  0. 18.100
  libpostproc    52.  3.100 / 52.  3.100
[swscaler @ 00000000029c8e00] [Eval @ 000000000022f5b0] Undefined constant or mi
ssing '(' in 'bicubiclin'
[swscaler @ 00000000029c8e00] Unable to parse option value "bicubiclin"
Error setting option sws_flags.
Failed to set value 'bicubiclin' for option 'sws_flags': Error number -22 occurr
ed

[Carl Eugen Hoyos]

Please add a working command line (of the older FFmpeg version when this used to work) including console output if you want me to do the regression tests or tell us the offending commit if you do the regression test yourself.

[Hendrik]

The option is called "bicublin", not "bicubiclin". If its spelled wrong, swscale won't recognize it and complain.

[cyril]

thanks heleppkes. The doc at ​http://www.ffmpeg.org/ffmpeg-scaler.html should be changed because it's telling us to use "bicubiclin"...

[Michael Niedermayer]

fixed the docs, or rather they will fix themselfs now when they are rebuild the next time