[FFmpeg-devel] Interlace-aware scaler

[Vitor Sessak]

Eduardo P wrote:
>> Libavfilter is not another project, it is a WIP new library that is part of the ffmpeg project.
>> where it's already implemented?
>>
>> Unfortunately not, it is just the right library where such a code would belong.
>>
>> See also http://wiki.multimedia.cx/index.php?title=Libavfilter .
>>
>> -Vitor
> 
> I'm having a problem building ffmpeg with libavfilter.
> 
> What I did:
> - checkout libavfilter from svn://svn.mplayerhq.hu/soc/libavfilter;
> - read the instructions in README;
> - run checkout.sh; cd ffmpeg; ./configure --enable-avfilter, make.
> 
> I have the following error:
> 
> /home/eduardo/src/libavfilter/ffmpeg/libswscale/libswscale.a(swscale.o):
> In function `yuv2yuvX16inC_template':
> /home/eduardo/src/libavfilter/ffmpeg/libswscale/swscale.c:496:
> undefined reference to `av_clip_uint16'
> /home/eduardo/src/libavfilter/ffmpeg/libswscale/swscale.c:515:
> undefined reference to `av_clip_uint16'
> /home/eduardo/src/libavfilter/ffmpeg/libswscale/swscale.c:516:
> undefined reference to `av_clip_uint16'
> /home/eduardo/src/libavfilter/ffmpeg/libswscale/swscale.c:532:
> undefined reference to `av_clip_uint16'
> /home/eduardo/src/libavfilter/ffmpeg/libswscale/swscale.c:496:
> undefined reference to `av_clip_uint16'
> /home/eduardo/src/libavfilter/ffmpeg/libswscale/libswscale.a(swscale.o):/home/eduardo/src/libavfilter/ffmpeg/libswscale/swscale.c:515:
> more undefined references to `av_clip_uint16' follow
> collect2: ld returned 1 exit status
> make: *** [ffmpeg_g] Error 1

This does not sound much libavfilter-related. Does it compiles fine if 
you configure it without "--enable-avfilter"?

-Vitor