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[PATCHES] Fix samba rpaths, add mplayer2
|
From: |
Taylan Ulrich Bayırlı/Kammer |
|
Subject: |
[PATCHES] Fix samba rpaths, add mplayer2 |
|
Date: |
Tue, 10 Mar 2015 19:49:02 +0100 |
|
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.4 (gnu/linux) |
The first patch closes at least one of the "dangling .so references"
bugs I reported recently; it should close all those where the dangling
references are to libtalloc, libtevent, libtdb, libwbclient, and
libcrypt. Possibly more, because those libs are just the ones that bit
me while building mplayer2, whereas the lib/ directory of samba had many
more .so files with dangling references (which apparently "infect" any
executables which in turn link to those .so files, if I'm not mistaken).
I could "manually" try to find out which of the bug reports are closed
by this, but I guess the smartest approach is to push the patch, wait
for the build farm to rebuild all samba-depending packages, do a "guix
package -u", "guix package -d <something>" and "guix gc" to prune the
old versions from the store, then reuse my method to find all the
dangling .so references in my store and see which ones disappeared.
>From 2cc56efd1cb7c6cfee6ed216d559780529dfb111 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Taylan=20Ulrich=20Bay=C4=B1rl=C4=B1/Kammer?=
<address@hidden>
Date: Tue, 10 Mar 2015 19:37:57 +0100
Subject: [PATCH 1/2] gnu: samba: Augment dynamic library rpaths.
* gnu/packages/samba.scm (samba): Augment the rpath of files in lib/ in
addition to those in bin/ and sbin/.
---
gnu/packages/samba.scm | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/gnu/packages/samba.scm b/gnu/packages/samba.scm
index 46b9721..c147abc 100644
--- a/gnu/packages/samba.scm
+++ b/gnu/packages/samba.scm
@@ -114,11 +114,13 @@ anywhere.")
(lambda* (#:key outputs #:allow-other-keys)
(let* ((out (assoc-ref outputs "out"))
(lib (string-append out "/lib")))
- ;; Add LIB to the RUNPATH of all the executables.
+ ;; Add LIB to the RUNPATH of all the executables and
+ ;; dynamic libraries.
(with-directory-excursion out
(for-each (cut augment-rpath <> lib)
(append (find-files "bin" ".*")
- (find-files "sbin" ".*"))))))
+ (find-files "sbin" ".*")
+ (find-files "lib" ".*"))))))
%standard-phases))
#:modules ((guix build gnu-build-system)
--
2.2.1
>From 817afcaf698658fcba9750521a17e54ec5665986 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Taylan=20Ulrich=20Bay=C4=B1rl=C4=B1/Kammer?=
<address@hidden>
Date: Wed, 4 Mar 2015 16:29:08 +0100
Subject: [PATCH 2/2] gnu: Add mplayer2.
* gnu/packages/video.scm (mplayer2): New variable.
* gnu/packages/patches/mplayer2-theora-fix.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
---
gnu-system.am | 1 +
gnu/packages/patches/mplayer2-theora-fix.patch | 286 +++++++++++++++++++++++++
gnu/packages/video.scm | 121 +++++++++++
3 files changed, 408 insertions(+)
create mode 100644 gnu/packages/patches/mplayer2-theora-fix.patch
diff --git a/gnu-system.am b/gnu-system.am
index 2175605..7339ae6 100644
--- a/gnu-system.am
+++ b/gnu-system.am
@@ -458,6 +458,7 @@ dist_patch_DATA =
\
gnu/packages/patches/mhash-keygen-test-segfault.patch \
gnu/packages/patches/mit-krb5-init-fix.patch \
gnu/packages/patches/mpc123-initialize-ao.patch \
+ gnu/packages/patches/mplayer2-theora-fix.patch \
gnu/packages/patches/module-init-tools-moduledir.patch \
gnu/packages/patches/mupdf-buildsystem-fix.patch \
gnu/packages/patches/mutt-CVE-2014-9116.patch \
diff --git a/gnu/packages/patches/mplayer2-theora-fix.patch
b/gnu/packages/patches/mplayer2-theora-fix.patch
new file mode 100644
index 0000000..982db5f
--- /dev/null
+++ b/gnu/packages/patches/mplayer2-theora-fix.patch
@@ -0,0 +1,286 @@
+Fix libtheora linking issue with modern theora versions.
+
+Adapted from:
+http://git.buildroot.net/buildroot/commit/?id=46b71cb0be27c0e6b7c93afb49fc80779bf310e3
+
+--- a/libmpcodecs/vd_theora.c
++++ b/libmpcodecs/vd_theora.c
+@@ -39,22 +39,23 @@
+
+ LIBVD_EXTERN(theora)
+
+-#include <theora/theora.h>
++#include <theora/theoradec.h>
+
+ #define THEORA_NUM_HEADER_PACKETS 3
+
+ typedef struct theora_struct_st {
+- theora_state st;
+- theora_comment cc;
+- theora_info inf;
++ th_setup_info *tsi;
++ th_dec_ctx *tctx;
++ th_comment tc;
++ th_info ti;
+ } theora_struct_t;
+
+ /** Convert Theora pixelformat to the corresponding IMGFMT_ */
+-static uint32_t theora_pixelformat2imgfmt(theora_pixelformat fmt){
++static uint32_t theora_pixelformat2imgfmt(th_pixel_fmt fmt){
+ switch(fmt) {
+- case OC_PF_420: return IMGFMT_YV12;
+- case OC_PF_422: return IMGFMT_422P;
+- case OC_PF_444: return IMGFMT_444P;
++ case TH_PF_420: return IMGFMT_YV12;
++ case TH_PF_422: return IMGFMT_422P;
++ case TH_PF_444: return IMGFMT_444P;
+ }
+ return 0;
+ }
+@@ -64,7 +65,7 @@
+ theora_struct_t *context = sh->context;
+ switch(cmd) {
+ case VDCTRL_QUERY_FORMAT:
+- if (*(int*)arg == theora_pixelformat2imgfmt(context->inf.pixelformat))
++ if (*(int*)arg == theora_pixelformat2imgfmt(context->ti.pixel_fmt))
+ return CONTROL_TRUE;
+ return CONTROL_FALSE;
+ }
+@@ -88,8 +89,9 @@
+ if (!context)
+ goto err_out;
+
+- theora_info_init(&context->inf);
+- theora_comment_init(&context->cc);
++ th_info_init(&context->ti);
++ th_comment_init(&context->tc);
++ context->tsi = NULL;
+
+ /* Read all header packets, pass them to theora_decode_header. */
+ for (i = 0; i < THEORA_NUM_HEADER_PACKETS; i++)
+@@ -109,7 +111,7 @@
+ op.b_o_s = 1;
+ }
+
+- if ( (errorCode = theora_decode_header (&context->inf, &context->cc,
&op)) )
++ if ( (errorCode = th_decode_headerin (&context->ti, &context->tc,
&context->tsi, &op)) < 0)
+ {
+ mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Broken Theora header;
errorCode=%i!\n", errorCode);
+ goto err_out;
+@@ -117,23 +119,25 @@
+ }
+
+ /* now init codec */
+- errorCode = theora_decode_init (&context->st, &context->inf);
+- if (errorCode)
++ context->tctx = th_decode_alloc (&context->ti, context->tsi);
++ if (!context->tctx)
+ {
+- mp_msg(MSGT_DECVIDEO,MSGL_ERR,"Theora decode init failed: %i \n",
errorCode);
++ mp_msg(MSGT_DECVIDEO,MSGL_ERR,"Theora decode init failed\n");
+ goto err_out;
+ }
++ /* free memory used for decoder setup information */
++ th_setup_free(context->tsi);
+
+- if(sh->aspect==0.0 && context->inf.aspect_denominator!=0)
++ if(sh->aspect==0.0 && context->ti.aspect_denominator!=0)
+ {
+- sh->aspect = ((double)context->inf.aspect_numerator *
context->inf.width)/
+- ((double)context->inf.aspect_denominator * context->inf.height);
++ sh->aspect = ((double)context->ti.aspect_numerator *
context->ti.frame_width)/
++ ((double)context->ti.aspect_denominator * context->ti.frame_height);
+ }
+
+ mp_msg(MSGT_DECVIDEO,MSGL_V,"INFO: Theora video init ok!\n");
+- mp_msg(MSGT_DECVIDEO,MSGL_INFO,"Frame: %dx%d, Picture %dx%d, Offset
[%d,%d]\n", context->inf.width, context->inf.height, context->inf.frame_width,
context->inf.frame_height, context->inf.offset_x, context->inf.offset_y);
++ mp_msg(MSGT_DECVIDEO,MSGL_INFO,"Frame: %dx%d, Picture %dx%d, Offset
[%d,%d]\n", context->ti.frame_width, context->ti.frame_height,
context->ti.pic_width, context->ti.pic_height, context->ti.pic_x,
context->ti.pic_y);
+
+- return mpcodecs_config_vo
(sh,context->inf.width,context->inf.height,theora_pixelformat2imgfmt(context->inf.pixelformat));
++ return mpcodecs_config_vo
(sh,context->ti.frame_width,context->ti.frame_height,theora_pixelformat2imgfmt(context->ti.pixel_fmt));
+
+ err_out:
+ free(context);
+@@ -150,9 +154,9 @@
+
+ if (context)
+ {
+- theora_info_clear(&context->inf);
+- theora_comment_clear(&context->cc);
+- theora_clear (&context->st);
++ th_info_clear(&context->ti);
++ th_comment_clear(&context->tc);
++ th_decode_free (context->tctx);
+ free (context);
+ }
+ }
+@@ -165,7 +169,7 @@
+ theora_struct_t *context = sh->context;
+ int errorCode = 0;
+ ogg_packet op;
+- yuv_buffer yuv;
++ th_ycbcr_buffer ycbcrbuf;
+ mp_image_t* mpi;
+
+ // no delayed frames
+@@ -177,31 +181,31 @@
+ op.packet = data;
+ op.granulepos = -1;
+
+- errorCode = theora_decode_packetin (&context->st, &op);
+- if (errorCode)
++ errorCode = th_decode_packetin (context->tctx, &op, NULL);
++ if (errorCode < 0)
+ {
+ mp_msg(MSGT_DECVIDEO,MSGL_ERR,"Theora decode packetin failed: %i \n",
+ errorCode);
+ return NULL;
+ }
+
+- errorCode = theora_decode_YUVout (&context->st, &yuv);
+- if (errorCode)
++ errorCode = th_decode_ycbcr_out (context->tctx, ycbcrbuf);
++ if (errorCode < 0)
+ {
+ mp_msg(MSGT_DECVIDEO,MSGL_ERR,"Theora decode YUVout failed: %i \n",
+ errorCode);
+ return NULL;
+ }
+
+- mpi = mpcodecs_get_image(sh, MP_IMGTYPE_EXPORT, 0, yuv.y_width,
yuv.y_height);
++ mpi = mpcodecs_get_image(sh, MP_IMGTYPE_EXPORT, 0, ycbcrbuf[0].width,
ycbcrbuf[0].height);
+ if(!mpi) return NULL;
+
+- mpi->planes[0]=yuv.y;
+- mpi->stride[0]=yuv.y_stride;
+- mpi->planes[1]=yuv.u;
+- mpi->stride[1]=yuv.uv_stride;
+- mpi->planes[2]=yuv.v;
+- mpi->stride[2]=yuv.uv_stride;
++ mpi->planes[0]=ycbcrbuf[0].data;
++ mpi->stride[0]=ycbcrbuf[0].stride;
++ mpi->planes[1]=ycbcrbuf[1].data;
++ mpi->stride[1]=ycbcrbuf[1].stride;
++ mpi->planes[2]=ycbcrbuf[2].data;
++ mpi->stride[2]=ycbcrbuf[2].stride;
+
+ return mpi;
+ }
+--- a/libmpdemux/demux_ogg.c
++++ b/libmpdemux/demux_ogg.c
+@@ -49,21 +49,21 @@
+ #endif
+
+ #ifdef CONFIG_OGGTHEORA
+-#include <theora/theora.h>
+-int _ilog (unsigned int); /* defined in many places in theora/lib/ */
++#include <theora/theoradec.h>
+ #endif
+
+ #define BLOCK_SIZE 4096
+
+ /* Theora decoder context : we won't be able to interpret granule positions
+- * without using theora_granule_time with the theora_state of the stream.
++ * without using th_granule_time with the th_dec_ctx of the stream.
+ * This is duplicated in `vd_theora.c'; put this in a common header?
+ */
+ #ifdef CONFIG_OGGTHEORA
+ typedef struct theora_struct_st {
+- theora_state st;
+- theora_comment cc;
+- theora_info inf;
++ th_setup_info *tsi;
++ th_dec_ctx *tctx;
++ th_comment tc;
++ th_info ti;
+ } theora_struct_t;
+ #endif
+
+@@ -116,7 +116,7 @@
+ float samplerate; /// granulpos 2 time
+ int64_t lastpos;
+ int32_t lastsize;
+- int keyframe_frequency_force;
++ int keyframe_granule_shift;
+
+ // Logical stream state
+ ogg_stream_state stream;
+@@ -299,11 +299,10 @@
+ have theora_state st, until all header packets were passed to the
+ decoder. */
+ if (!pack->bytes || !(*data&0x80)) {
+- int keyframe_granule_shift = _ilog(os->keyframe_frequency_force -
1);
+- int64_t iframemask = (1 << keyframe_granule_shift) - 1;
++ int64_t iframemask = (1 << os->keyframe_granule_shift) - 1;
+
+ if (pack->granulepos >= 0) {
+- os->lastpos = pack->granulepos >> keyframe_granule_shift;
++ os->lastpos = pack->granulepos >> os->keyframe_granule_shift;
+ os->lastpos += pack->granulepos & iframemask;
+ *flags = (pack->granulepos & iframemask) == 0;
+ } else {
+@@ -892,14 +891,15 @@
+ #ifdef CONFIG_OGGTHEORA
+ } else if (pack.bytes >= 7 && !strncmp (&pack.packet[1], "theora",
6)) {
+ int errorCode = 0;
+- theora_info inf;
+- theora_comment cc;
++ th_info ti;
++ th_comment tc;
++ th_setup_info *tsi = NULL;
+
+- theora_info_init (&inf);
+- theora_comment_init (&cc);
++ th_info_init (&ti);
++ th_comment_init (&tc);
+
+- errorCode = theora_decode_header (&inf, &cc, &pack);
+- if (errorCode) {
++ errorCode = th_decode_headerin(&ti, &tc, &tsi, &pack);
++ if (errorCode < 0) {
+ mp_msg(MSGT_DEMUX, MSGL_ERR,
+ "Theora header parsing failed: %i \n", errorCode);
+ } else {
+@@ -908,30 +908,32 @@
+ sh_v->bih = calloc(1, sizeof(*sh_v->bih));
+ sh_v->bih->biSize = sizeof(*sh_v->bih);
+ sh_v->bih->biCompression = sh_v->format = FOURCC_THEORA;
+- sh_v->fps = ((double)inf.fps_numerator) /
(double)inf.fps_denominator;
+- sh_v->frametime = ((double)inf.fps_denominator) /
(double)inf.fps_numerator;
+- sh_v->disp_w = sh_v->bih->biWidth = inf.frame_width;
+- sh_v->disp_h = sh_v->bih->biHeight = inf.frame_height;
++ sh_v->fps = ((double)ti.fps_numerator) /
(double)ti.fps_denominator;
++ sh_v->frametime = ((double)ti.fps_denominator) /
(double)ti.fps_numerator;
++ sh_v->i_bps = ti.target_bitrate / 8;
++ sh_v->disp_w = sh_v->bih->biWidth = ti.frame_width;
++ sh_v->disp_h = sh_v->bih->biHeight = ti.frame_height;
+ sh_v->bih->biBitCount = 24;
+ sh_v->bih->biPlanes = 3;
+ sh_v->bih->biSizeImage = ((sh_v->bih->biBitCount / 8) *
sh_v->bih->biWidth * sh_v->bih->biHeight);
+ ogg_d->subs[ogg_d->num_sub].samplerate =
sh_v->fps;
+ ogg_d->subs[ogg_d->num_sub].theora = 1;
+- ogg_d->subs[ogg_d->num_sub].keyframe_frequency_force =
inf.keyframe_frequency_force;
++ ogg_d->subs[ogg_d->num_sub].keyframe_granule_shift =
ti.keyframe_granule_shift;
+ ogg_d->subs[ogg_d->num_sub].id =
n_video;
+ n_video++;
+ mp_msg(MSGT_DEMUX, MSGL_INFO,
+ "[Ogg] stream %d: video (Theora v%d.%d.%d), -vid %d\n",
+ ogg_d->num_sub,
+- (int)inf.version_major,
+- (int)inf.version_minor,
+- (int)inf.version_subminor,
++ (int)ti.version_major,
++ (int)ti.version_minor,
++ (int)ti.version_subminor,
+ n_video - 1);
+ if (mp_msg_test(MSGT_HEADER, MSGL_V))
+ print_video_header(sh_v->bih, MSGL_V);
+ }
+- theora_comment_clear(&cc);
+- theora_info_clear(&inf);
++ th_comment_clear(&tc);
++ th_info_clear(&ti);
++ th_setup_free(tsi);
+ #endif /* CONFIG_OGGTHEORA */
+ } else if (pack.bytes >= 4 && !strncmp (&pack.packet[0], "fLaC", 4)) {
+ sh_a = new_sh_audio_aid(demuxer, ogg_d->num_sub, n_audio, NULL);
diff --git a/gnu/packages/video.scm b/gnu/packages/video.scm
index 344e4b6..37335a5 100644
--- a/gnu/packages/video.scm
+++ b/gnu/packages/video.scm
@@ -26,6 +26,7 @@
fsf-free isc))
#:use-module (guix packages)
#:use-module (guix download)
+ #:use-module (guix git-download)
#:use-module (guix build-system cmake)
#:use-module (guix build-system gnu)
#:use-module (guix build-system python)
@@ -34,6 +35,7 @@
#:use-module (gnu packages audio)
#:use-module (gnu packages autotools)
#:use-module (gnu packages avahi)
+ #:use-module (gnu packages base)
#:use-module (gnu packages cdrom)
#:use-module (gnu packages compression)
#:use-module (gnu packages databases)
@@ -42,6 +44,7 @@
#:use-module (gnu packages fontutils)
#:use-module (gnu packages fribidi)
#:use-module (gnu packages gettext)
+ #:use-module (gnu packages ghostscript)
#:use-module (gnu packages gl)
#:use-module (gnu packages glib)
#:use-module (gnu packages guile)
@@ -59,6 +62,7 @@
#:use-module (gnu packages pulseaudio)
#:use-module (gnu packages python)
#:use-module (gnu packages qt)
+ #:use-module (gnu packages samba)
#:use-module (gnu packages sdl)
#:use-module (gnu packages ssh)
#:use-module (gnu packages texlive)
@@ -506,6 +510,123 @@ NuppelVideo, FLI, YUV4MPEG, FILM, RoQ, PVA files. One
can watch VideoCD,
SVCD, DVD, 3ivx, DivX 3/4/5, WMV and H.264 movies.")
(license gpl2)))
+;;; This is not version 2; it's a fork literally named "mplayer2".
+(define-public mplayer2
+ (package
+ (name "mplayer2")
+ ;; There are no tarballs. The 2.0 git tag, which is actually the first
+ ;; release is from 2011. The latest commit is from 2013 October, so we
+ ;; use that commit.
+ (version "201310")
+ (source (origin
+ (method git-fetch)
+ (uri (git-reference
+ (url "git://git.mplayer2.org/mplayer2.git")
+ (commit "2c378c71a4d9b1df382db9aa787b646628b4e3f9")))
+ (sha256
+ (base32
+ "0s8554sanj6cvnf0h148nsmjgy5v0568nmcza7grpv6fnmddpfam"))
+ ;; Warning: after using this patch, one must pass the -ltheora
+ ;; linker flag manually to configure; see below.
+ (patches (list (search-patch "mplayer2-theora-fix.patch")))))
+ (build-system gnu-build-system)
+ (native-inputs
+ `(("pkg-config" ,pkg-config)
+ ("perl" ,perl)
+ ("python" ,python)
+ ("python-2" ,python-2)
+ ("python-docutils" ,python-docutils)
+ ;; ./configure uses which(1) to find rst2man.py.
+ ("which" ,which)))
+ ;; Missing features: DirectFB, Xss screensaver extensions, VDPAU, MNG,
+ ;; libnut, DirectShow TV interface, Radio interfaces of all kinds, vstream
+ ;; client, XMSS inputplugin support, joystick, lirc/lircc, and openal.
+ ;; OpenAL support is experimental and causes compilation to fail with
+ ;; linker errors.
+ (inputs
+ `(("alsa-lib" ,alsa-lib)
+ ("faad2" ,faad2)
+ ("ffmpeg" ,ffmpeg)
+ ("gettext" ,gnu-gettext)
+ ("jack" ,jack-2)
+ ("ladspa" ,ladspa)
+ ("lcms" ,lcms)
+ ("liba52" ,liba52)
+ ("libass" ,libass)
+ ("libbluray" ,libbluray)
+ ("libbs2b" ,libbs2b)
+ ("libcaca" ,libcaca)
+ ("libcdio-paranoia" ,libcdio-paranoia)
+ ("libdca" ,libdca)
+ ("libdv" ,libdv)
+ ("libdvdread" ,libdvdread)
+ ("libdvdnav" ,libdvdnav-4)
+ ("libjpeg" ,libjpeg)
+ ("libmad" ,libmad)
+ ("libpng" ,libpng)
+ ("libquvi" ,libquvi)
+ ("libtheora" ,libtheora)
+ ("libungif" ,libungif)
+ ("libvorbis" ,libvorbis)
+ ("libx11" ,libx11)
+ ("libxinerama" ,libxinerama)
+ ("libxv" ,libxv)
+ ("mesa" ,mesa)
+ ("mpg123" ,mpg123)
+ ("ncurses" ,ncurses)
+ ("portaudio" ,portaudio)
+ ("pulseaudio" ,pulseaudio)
+ ("rsound" ,rsound)
+ ("samba" ,samba)
+ ("sdl" ,sdl)
+ ("speex" ,speex)
+ ("xvid" ,xvid)))
+ (arguments
+ '(#:phases
+ (alist-replace
+ 'configure
+ ;; ./configure does not work followed by "SHELL=..." and
+ ;; "CONFIG_SHELL=..."; set environment variables instead.
+ (lambda* (#:key inputs outputs #:allow-other-keys)
+ (setenv "SHELL" (which "bash"))
+ (setenv "CONFIG_SHELL" (which "bash"))
+ (substitute* "configure"
+ (("/usr/X11") (assoc-ref inputs "libx11")))
+ (zero?
+ (system* "./configure"
+ (string-append "--prefix=" (assoc-ref outputs "out"))
+ "--enable-translation"
+ "--enable-runtime-cpudetection"
+ ;; This is needed in accordance with the theora patch.
+ "--extra-libs=-ltheoradec")))
+ (alist-cons-before
+ 'build 'fix-TOOLS-shebangs
+ (lambda _
+ (substitute* (find-files "TOOLS" "\\.(sh|pl|py)$")
+ (("/usr/bin/env") (which "env"))
+ (("/usr/bin/perl") (which "perl"))
+ (("/usr/bin/python3") (which "python3"))
+ (("/usr/bin/python") (which "python"))))
+ (alist-cons-before
+ 'build 'fix-input-buffer-padding-size
+ (lambda _
+ (substitute* "libmpdemux/demuxer.h"
+ ;; This has to match with FFmpeg's FF_INPUT_BUFFER_PADDING_SIZE,
+ ;; which has changed at some point.
+ (("(#define MP_INPUT_BUFFER_PADDING_SIZE )[0-9]*" all)
+ (string-append all "32"))))
+ %standard-phases)))
+ ;; No 'check' target.
+ #:tests? #f))
+ (home-page "http://www.mplayer2.org/";)
+ (synopsis "Audio and video player")
+ (description "mplayer2 is a general-purpose audio and video player. It's
+a fork of the original MPlayer project, and contains further development in
+several areas.")
+ ;; See file Copyright. Most files are gpl2+ or compatible, but talloc.c
+ ;; is under lgpl3+, thus the whole project becomes gpl3+.
+ (license gpl3+)))
+
(define-public libvpx
(package
(name "libvpx")
--
2.2.1
- [PATCHES] Fix samba rpaths, add mplayer2,
Taylan Ulrich Bayırlı/Kammer <=