In case anyone is interested in hacking on this code, here's some info about API changes needed to support newer versions of libraries we use. This is probably not a complete list.

If you just want to statically build everything, I highly recommend using the build script and old version tarballs located at https://github.com/Logitech/slimserver-vendor/tree/public/7.9/CPAN Running ./buildme.sh Media::Scan is where to start. It probably needs a little hacking to use a newer version of Perl but otherwise it should be able to build everything.

ffmpeg

ffmpeg's API has moved on quite a bit from when this code was written. libmediascan was developed around version 0.8.4 and we always intended it to be statically linked to avoid these kinds of problems. The doc/APIchanges file is pretty helpful at figuring out what the new APIs are.

After a quick look at ffmpeg's release/2.8 branch, it looks like the following changes need to be worked out. I didn't check the state of the master branch.

src/mediascan.c:

Registering a file protocol seems to be unnecessary now, so REGISTER_PROTOCOL stuff can be removed.

--- a/src/mediascan.c
+++ b/src/mediascan.c
@@ -173,9 +173,6 @@ static void register_codecs(void) {
 #define REGISTER_DEMUXER(X,x) { \
   extern AVInputFormat ff_##x##_demuxer; \
        av_register_input_format(&ff_##x##_demuxer); }
-#define REGISTER_PROTOCOL(X,x) { \
-  extern URLProtocol ff_##x##_protocol; \
-  av_register_protocol2(&ff_##x##_protocol, sizeof(ff_##x##_protocol)); }

 ///-------------------------------------------------------------------------------------------------
 ///  Registers the formats for FFmpeg.
@@ -197,9 +194,6 @@ static void register_formats(void) {
   REGISTER_DEMUXER(MPEGPS, mpegps); // VOB files
   REGISTER_DEMUXER(MPEGTS, mpegts);
   REGISTER_DEMUXER(MPEGVIDEO, mpegvideo);
-
-  // protocols
-  REGISTER_PROTOCOL(FILE, file);
 }                               /* register_formats() */

src/result.c

--- a/src/result.c
+++ b/src/result.c
@@ -323,7 +323,7 @@ static int scan_video(MediaScanResult *r) {

   r->_avf = (void *)avf;

-  if ((AVError = av_find_stream_info(avf)) < 0) {
+  if ((AVError = avformat_find_stream_info(avf, NULL)) < 0) {
     r->error = error_create(r->path, MS_ERROR_READ, "[libavformat] Unable to find stream info");
     r->error->averror = AVError;
     ret = 0;
@@ -372,9 +372,6 @@ static int scan_video(MediaScanResult *r) {
     v->_codecs = (void *)codecs;
     v->_avc = (void *)c;
   }
-  else if (codecs->vc->codec_name[0] != '\0') {
-    v->codec = codecs->vc->codec_name;
-  }
   else {
     char codec_tag_string[128];

@@ -403,9 +400,6 @@ static int scan_video(MediaScanResult *r) {
     if (ac) {
       a->codec = ac->name;
     }
-    else if (codecs->ac->codec_name[0] != '\0') {
-      a->codec = codecs->ac->codec_name;
-    }
     // Special case for handling MP1 audio streams which FFMPEG can't identify a codec for
     else if (codecs->ac->codec_id == CODEC_ID_MP1) {
       a->codec = CODEC_MP1;
@@ -632,7 +626,7 @@ void result_destroy(MediaScanResult *r) {
     tag_destroy(r->_tag);

   if (r->_avf) {
-    av_close_input_file(r->_avf);
+    avformat_close_input(r->_avf);

src/video.c

--- a/src/video.c
+++ b/src/video.c
@@ -64,12 +64,12 @@ MediaScanImage *video_create_image_from_frame(MediaScanVideo *v, MediaScanResult
   int no_keyframe_found = 0;
   int skipped_frames = 0;

-  if ((avcodec_open(codecs->vc, codec)) < 0) {
+  if ((avcodec_open2(codecs->vc, codec, NULL)) < 0) {
     LOG_ERROR("Couldn't open video codec %s for thumbnail creation\n", codec->name);
     goto err;
   }

-  frame = avcodec_alloc_frame();
+  frame = av_frame_alloc();
   if (!frame) {
     LOG_ERROR("Couldn't allocate a video frame\n");
     goto err;
@@ -171,7 +171,7 @@ MediaScanImage *video_create_image_from_frame(MediaScanVideo *v, MediaScanResult
       goto err;
     }

-    frame_rgb = avcodec_alloc_frame();
+    frame_rgb = av_frame_alloc();
     if (!frame_rgb) {
       LOG_ERROR("Couldn't allocate a video frame\n");
       goto err;

giflib

giflib changed their API at some point, I fixed this in Image::Scale so see that code for reference on what needs changed.

libdlna

We have a local version of libdlna in the source tree that uses various ffmpeg calls that need updated. Possibly a newer libdlna can just be dropped in.

OSX

I get the following warnings when building on 10.11.4 El Capitan with Apple LLVM version 7.3.0 (clang-703.0.31).

mediascan_macos.m:50:11: warning: 'CFURLGetFSRef' is deprecated: first deprecated in OS X 10.9
mediascan_macos.m:52:21: warning: 'FSResolveAliasFile' is deprecated: first deprecated in OS X 10.8
NSString+SymlinksAndAliases.m:239:7: warning: 'CFURLGetFSRef' is deprecated: first deprecated in OS X 10.9
NSString+SymlinksAndAliases.m:242:16: warning: 'FSResolveAliasFileWithMountFlags' is deprecated: first deprecated in OS X 10.8
NSString+SymlinksAndAliases.m:246:28: warning: 'CFURLCreateFromFSRef' is deprecated: first deprecated in OS X 10.9

Compiling "mediascan_unix.c" resulted in a problem concerned with the d_type/DT_DIR issue on some platforms (line 114 in "mediascan_unix.c")

The problem could be solved by adding the following line to the file:

in case of (line 114):
if (dp->d_type == DT_DIR) {
I put:
stat(dp->d_name, &t);
if ((t.st_mode & S_IFMT) == S_IFDIR) {

I also had to add "struct stat t;" to function "recurse_dir"

Maybe this helps to get libmediascan running on Solaris/Openindiana

Dear Andy,

I'm in the (slow) process of packaging the Logitech Media Server for Debian, and for that to work, I'm currently looking at libmediascan. One of the most important steps to get libmediascan into Debian is to check the license of all the source. I have several requests for clarification.

1. There's a COPYING file containing the LGPL3 in your source tree. I can only assume you meant to declare all your code to be available under the LGPL3 license. Is that correct? Did you mean LGPL3 or LGPL3 or any later version? I also note that bindings/perl/Makefile.PL claims that the license (of the binding?) is gpl_2
2. src/libdlna/ seems to be mostly covered by the LGPL2.1 Is that also your understanding?
3. I found a lot of precompiled libraries in lib/ and win32/, I believe I can strip those directories out. Does that seem reasonable to you?
4. I'm a bit worried about the test data. It seems to me you created some of the test data yourself, but (last time I checked, I take this from memory) also took some files from the PNG wikipedia page. Is that correct? Do you have any other sources?

av_register_protocol2 has been removed from newer versions of FFmpeg, so this no longer builds.