ports/109379: ffmpeg-devel can't dynamically link to faad2

[Michael Johnson]

On 4/2/07, Bill Fenner <fenner at research.att.com> wrote:
>
> The following reply was made to PR ports/109379; it has been noted by
> GNATS.
>
> From: Bill Fenner <fenner at research.att.com>
> To: ahze at FreeBSD.org
> Cc: freebsd-gnats-submit at FreeBSD.org, freebsd-multimedia at FreeBSD.org
> Subject: Re: ports/109379: ffmpeg-devel can't dynamically link to faad2
> Date: Mon, 2 Apr 2007 10:14:51 -0700
>
> While faad 2.5,1 includes API compatability,
> as I stated in the description of the problem,
> the linkage that ffmpeg uses is not able to
> use that API compatability.  This is because
> the faad API compatability is performed with
> #defines, and the ffmpeg linkage happens with
> fancy macros that put together the function
> names in a way that doesn't allow the #defines
> to work.
>
> (The dfaac() macro in libavcodec/faad.c
> uses "faacDec" ## a to put symbols together
> to get, e.g. faacDecGetErrorMessage, into
> strings, which it then looks up in the shared
> library with dlsym(), which never gives the
> "compatability API" a chance to get in the
> middle).
>
> Were you able to get the steps in "how-to-repeat:"
> to work, or did you just close the PR because
> you think it is supposed to work?  I think it is
> supposed to work too, but that doesn't mean it does.
>
> I spent an hour rebuilding faad (of which I already
> had 2.5,1 installed) and ffmpeg-devel (which I upgraded
> from ffmpeg-devel-0.4.9.c.2006032300_4 to
> ffmpeg-devel-0.4.9.c.2006032300_5) to make sure that
> the bug was still there.


okay, you're right. I'll fix.


frogbits% pkg_info -I ffmpeg\* faad\*
> faad2-2.5,1         MPEG-2 and MPEG-4 AAC audio decoder
> ffmpeg-devel-0.4.9.c.2006032300_5 Hyper fast realtime audio/video
> encoder/converter, streamin
> frogbits% ffmpeg -i Diego-2.mp4 /tmp/foo.mpeg
> FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
>    configuration:  --cc=cc --prefix=/usr/local --make=gmake
> --disable-debug --enable-memalign-hack --enable-shared
> --source-path=/usr/ports/multimedia/ffmpeg-devel/work/FFMpeg-2006032300
> --enable-a52 --enable-dts --enable-faac --enable-faad --enable-faadbin
> --enable-gpl --enable-libgsm --enable-mp3lame --enable-libogg --enable-pp
> --enable-pthreads --enable-vorbis --enable-x264 --enable-xvid
>    libavutil version: 49.0.0
>    libavcodec version: 51.8.0
>    libavformat version: 50.4.0
>    built on Apr  2 2007 10:02:29, gcc: 3.4.4 [FreeBSD] 20050518
>
> Seems that stream 0 comes from film source: 24000.00 (24000/1) -> 23.98(24000/1001)
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Diego-2.mp4':
>    Duration: 00:42:45.1, start: 0.000000, bitrate: 1129 kb/s
>    Stream #0.0(eng), 23.98 fps(r): Video: mpeg4, yuv420p, 640x480
>    Stream #0.1(eng): Audio: aac, 44100 Hz, stereo
> Output #0, mpeg, to '/tmp/foo.mpeg':
>    Stream #0.0, 23.98 fps(c): Video: mpeg1video, yuv420p, 640x480, q=2-31,
> 200 kb/s
>    Stream #0.1: Audio: mp2, 44100 Hz, stereo, 64 kb/s
> Stream mapping:
>    Stream #0.0 -> #0.0
>    Stream #0.1 -> #0.1
> [aac @ 0x28356028]FAAD library: cannot resolve faacDecGetErrorMessage in
> libfaad.so.0!
> Error while opening codec for input stream #0.1
>
>
>    Bill
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