In file included from file.cpp:21:
In file included from ./file.h:32:
./common.h:19:15: warning: variadic templates are a C++11 extension [-Wc++11-extensions]
template<class... Args>
              ^
./common.h:20:15: warning: rvalue references are a C++11 extension [-Wc++11-extensions]
void logg(Args&&... args){
              ^
./common.h:22:18: warning: alias declarations are a C++11 extension [-Wc++11-extensions]
        using creator = int[]; // dummy
                        ^
./common.h:23:9: error: expected unqualified-id
        creator{ 0, ( std::cout << (std::forward<Args>(args)), 0) ... };
               ^
./common.h:29:15: warning: variadic templates are a C++11 extension [-Wc++11-extensions]
template<class... Args>
              ^
./common.h:30:26: warning: rvalue references are a C++11 extension [-Wc++11-extensions]
void logg(LogMode m, Args&&... x){
                         ^
./common.h:62:42: error: non-aggregate type 'const std::map<std::string, std::string>' (aka 'const map<basic_string<char, char_traits<char>, allocator<char> >, basic_string<char, char_traits<char>, allocator<char> > >') cannot be initialized with an initializer list
const std::map<std::string, std::string> g_atom_names = {
                                         ^              ~
In file included from file.cpp:21:
./file.h:41:12: error: unknown type name 'off64_t'; did you mean 'off_t'?
        void seek(off64_t p);
                  ^~~~~~~
                  off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from file.cpp:21:
./file.h:42:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t pos();
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from file.cpp:21:
./file.h:44:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t length() { return size_; }
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from file.cpp:21:
./file.h:56:20: error: unknown type name 'off64_t'; did you mean 'off_t'?
        size_t fillBuffer(off64_t location);
                          ^~~~~~~
                          off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from file.cpp:21:
./file.h:58:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t size_;
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from file.cpp:21:
./file.h:60:20: warning: in-class initialization of non-static data member is a C++11 extension [-Wc++11-extensions]
        ssize_t buf_size_ = 15*(1<<20); // 15 MB
                          ^
./file.h:61:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t buf_begin_;
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from file.cpp:21:
./file.h:62:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t buf_off_;
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from file.cpp:21:
./file.h:71:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t pos();
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
file.cpp:69:21: error: unknown type name 'off64_t'; did you mean 'off_t'?
void FileRead::seek(off64_t p) {
                    ^~~~~~~
                    off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
file.cpp:76:1: error: unknown type name 'off64_t'; did you mean 'off_t'?
off64_t FileRead::pos() {
^~~~~~~
off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
file.cpp:84:29: error: unknown type name 'off64_t'; did you mean 'off_t'?
size_t FileRead::fillBuffer(off64_t location) {
                            ^~~~~~~
                            off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
file.cpp:85:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t avail = (buf_begin_+buf_size_) - location;
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
file.cpp:86:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t buf_loc = location - buf_begin_;
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
file.cpp:178:1: error: unknown type name 'off64_t'; did you mean 'off_t'?
off64_t FileWrite::pos() {
^~~~~~~
off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
6 warnings and 16 errors generated.
main.cpp:24:10: fatal error: 'libavutil/ffversion.h' file not found
#include "libavutil/ffversion.h"
         ^~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
In file included from track.cpp:21:
In file included from ./track.h:27:
In file included from ./codec.h:7:
./common.h:19:15: warning: variadic templates are a C++11 extension [-Wc++11-extensions]
template<class... Args>
              ^
./common.h:20:15: warning: rvalue references are a C++11 extension [-Wc++11-extensions]
void logg(Args&&... args){
              ^
./common.h:22:18: warning: alias declarations are a C++11 extension [-Wc++11-extensions]
        using creator = int[]; // dummy
                        ^
./common.h:23:9: error: expected unqualified-id
        creator{ 0, ( std::cout << (std::forward<Args>(args)), 0) ... };
               ^
./common.h:29:15: warning: variadic templates are a C++11 extension [-Wc++11-extensions]
template<class... Args>
              ^
./common.h:30:26: warning: rvalue references are a C++11 extension [-Wc++11-extensions]
void logg(LogMode m, Args&&... x){
                         ^
./common.h:62:42: error: non-aggregate type 'const std::map<std::string, std::string>' (aka 'const map<basic_string<char, char_traits<char>, allocator<char> >, basic_string<char, char_traits<char>, allocator<char> > >') cannot be initialized with an initializer list
const std::map<std::string, std::string> g_atom_names = {
                                         ^              ~
In file included from track.cpp:21:
In file included from ./track.h:27:
./codec.h:34:18: warning: in-class initialization of non-static data member is a C++11 extension [-Wc++11-extensions]
        int n_channels_ = 0;
                        ^
In file included from track.cpp:36:
In file included from ./atom.h:10:
./file.h:41:12: error: unknown type name 'off64_t'; did you mean 'off_t'?
        void seek(off64_t p);
                  ^~~~~~~
                  off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from track.cpp:36:
In file included from ./atom.h:10:
./file.h:42:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t pos();
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from track.cpp:36:
In file included from ./atom.h:10:
./file.h:44:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t length() { return size_; }
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from track.cpp:36:
In file included from ./atom.h:10:
./file.h:56:20: error: unknown type name 'off64_t'; did you mean 'off_t'?
        size_t fillBuffer(off64_t location);
                          ^~~~~~~
                          off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from track.cpp:36:
In file included from ./atom.h:10:
./file.h:58:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t size_;
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from track.cpp:36:
In file included from ./atom.h:10:
./file.h:60:20: warning: in-class initialization of non-static data member is a C++11 extension [-Wc++11-extensions]
        ssize_t buf_size_ = 15*(1<<20); // 15 MB
                          ^
./file.h:61:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t buf_begin_;
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from track.cpp:36:
In file included from ./atom.h:10:
./file.h:62:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t buf_off_;
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from track.cpp:36:
In file included from ./atom.h:10:
./file.h:71:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t pos();
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
track.cpp:193:6: warning: 'auto' type specifier is a C++11 extension [-Wc++11-extensions]
        for(auto time : times_)
            ^
track.cpp:193:16: warning: range-based for loop is a C++11 extension [-Wc++11-extensions]
        for(auto time : times_)
                      ^
track.cpp:304:21: error: a space is required between consecutive right angle brackets (use '> >')
        vector<pair<int,int>> vp;
                           ^~
                           > >
track.cpp:307:7: error: no member named 'emplace_back' in 'std::__1::vector<std::__1::pair<int, int>, std::__1::allocator<std::__1::pair<int, int> > >'
                        vp.emplace_back(1, times_[i]);
                        ~~ ^
track.cpp:316:6: warning: 'auto' type specifier is a C++11 extension [-Wc++11-extensions]
        for(auto p : vp) {
            ^
track.cpp:316:13: warning: range-based for loop is a C++11 extension [-Wc++11-extensions]
        for(auto p : vp) {
                   ^
11 warnings and 12 errors generated.
In file included from atom.cpp:2:
In file included from ./atom.h:9:
./common.h:19:15: warning: variadic templates are a C++11 extension [-Wc++11-extensions]
template<class... Args>
              ^
./common.h:20:15: warning: rvalue references are a C++11 extension [-Wc++11-extensions]
void logg(Args&&... args){
              ^
./common.h:22:18: warning: alias declarations are a C++11 extension [-Wc++11-extensions]
        using creator = int[]; // dummy
                        ^
./common.h:23:9: error: expected unqualified-id
        creator{ 0, ( std::cout << (std::forward<Args>(args)), 0) ... };
               ^
./common.h:29:15: warning: variadic templates are a C++11 extension [-Wc++11-extensions]
template<class... Args>
              ^
./common.h:30:26: warning: rvalue references are a C++11 extension [-Wc++11-extensions]
void logg(LogMode m, Args&&... x){
                         ^
./common.h:62:42: error: non-aggregate type 'const std::map<std::string, std::string>' (aka 'const map<basic_string<char, char_traits<char>, allocator<char> >, basic_string<char, char_traits<char>, allocator<char> > >') cannot be initialized with an initializer list
const std::map<std::string, std::string> g_atom_names = {
                                         ^              ~
In file included from atom.cpp:2:
In file included from ./atom.h:10:
./file.h:41:12: error: unknown type name 'off64_t'; did you mean 'off_t'?
        void seek(off64_t p);
                  ^~~~~~~
                  off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from atom.cpp:2:
In file included from ./atom.h:10:
./file.h:42:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t pos();
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from atom.cpp:2:
In file included from ./atom.h:10:
./file.h:44:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t length() { return size_; }
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from atom.cpp:2:
In file included from ./atom.h:10:
./file.h:56:20: error: unknown type name 'off64_t'; did you mean 'off_t'?
        size_t fillBuffer(off64_t location);
                          ^~~~~~~
                          off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from atom.cpp:2:
In file included from ./atom.h:10:
./file.h:58:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t size_;
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from atom.cpp:2:
In file included from ./atom.h:10:
./file.h:60:20: warning: in-class initialization of non-static data member is a C++11 extension [-Wc++11-extensions]
        ssize_t buf_size_ = 15*(1<<20); // 15 MB
                          ^
./file.h:61:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t buf_begin_;
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from atom.cpp:2:
In file included from ./atom.h:10:
./file.h:62:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t buf_off_;
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from atom.cpp:2:
In file included from ./atom.h:10:
./file.h:71:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t pos();
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
atom.cpp:326:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t start = output.pos();
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
atom.cpp:332:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t offset = file_begin_;
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
atom.cpp:349:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t end = output.pos();
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
6 warnings and 13 errors generated.
In file included from mp4.cpp:32:
In file included from ./mp4.h:28:
In file included from ./track.h:27:
In file included from ./codec.h:7:
./common.h:19:15: warning: variadic templates are a C++11 extension [-Wc++11-extensions]
template<class... Args>
              ^
./common.h:20:15: warning: rvalue references are a C++11 extension [-Wc++11-extensions]
void logg(Args&&... args){
              ^
./common.h:22:18: warning: alias declarations are a C++11 extension [-Wc++11-extensions]
        using creator = int[]; // dummy
                        ^
./common.h:23:9: error: expected unqualified-id
        creator{ 0, ( std::cout << (std::forward<Args>(args)), 0) ... };
               ^
./common.h:29:15: warning: variadic templates are a C++11 extension [-Wc++11-extensions]
template<class... Args>
              ^
./common.h:30:26: warning: rvalue references are a C++11 extension [-Wc++11-extensions]
void logg(LogMode m, Args&&... x){
                         ^
./common.h:62:42: error: non-aggregate type 'const std::map<std::string, std::string>' (aka 'const map<basic_string<char, char_traits<char>, allocator<char> >, basic_string<char, char_traits<char>, allocator<char> > >') cannot be initialized with an initializer list
const std::map<std::string, std::string> g_atom_names = {
                                         ^              ~
In file included from mp4.cpp:32:
In file included from ./mp4.h:28:
In file included from ./track.h:27:
./codec.h:34:18: warning: in-class initialization of non-static data member is a C++11 extension [-Wc++11-extensions]
        int n_channels_ = 0;
                        ^
In file included from mp4.cpp:32:
./mp4.h:59:21: warning: in-class initialization of non-static data member is a C++11 extension [-Wc++11-extensions]
        bool broken_is_64_ = false;
                           ^
./mp4.h:60:22: warning: in-class initialization of non-static data member is a C++11 extension [-Wc++11-extensions]
        int unknown_length_ = 0;
                            ^
In file included from mp4.cpp:33:
In file included from ./atom.h:10:
./file.h:41:12: error: unknown type name 'off64_t'; did you mean 'off_t'?
        void seek(off64_t p);
                  ^~~~~~~
                  off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from mp4.cpp:33:
In file included from ./atom.h:10:
./file.h:42:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t pos();
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from mp4.cpp:33:
In file included from ./atom.h:10:
./file.h:44:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t length() { return size_; }
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from mp4.cpp:33:
In file included from ./atom.h:10:
./file.h:56:20: error: unknown type name 'off64_t'; did you mean 'off_t'?
        size_t fillBuffer(off64_t location);
                          ^~~~~~~
                          off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from mp4.cpp:33:
In file included from ./atom.h:10:
./file.h:58:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t size_;
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from mp4.cpp:33:
In file included from ./atom.h:10:
./file.h:60:20: warning: in-class initialization of non-static data member is a C++11 extension [-Wc++11-extensions]
        ssize_t buf_size_ = 15*(1<<20); // 15 MB
                          ^
./file.h:61:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t buf_begin_;
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from mp4.cpp:33:
In file included from ./atom.h:10:
./file.h:62:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t buf_off_;
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
In file included from mp4.cpp:33:
In file included from ./atom.h:10:
./file.h:71:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t pos();
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
mp4.cpp:181:19: warning: range-based for loop is a C++11 extension [-Wc++11-extensions]
        for(Track& track : tracks_) {
                         ^
mp4.cpp:201:3: warning: 'auto' type specifier is a C++11 extension [-Wc++11-extensions]
                auto x = div(bmsec, 1000); msec = x.rem; sec = x.quot;
                ^
mp4.cpp:216:8: warning: 'auto' type specifier is a C++11 extension [-Wc++11-extensions]
                for (auto n : unknown_lengths_) bytes_not_matched += n;
                     ^
mp4.cpp:216:15: warning: range-based for loop is a C++11 extension [-Wc++11-extensions]
                for (auto n : unknown_lengths_) bytes_not_matched += n;
                            ^
mp4.cpp:277:4: error: unknown type name 'off64_t'; did you mean 'off_t'?
                        off64_t offset;
                        ^~~~~~~
                        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
mp4.cpp:295:15: warning: 'auto' type specifier is a C++11 extension [-Wc++11-extensions]
                        for (const auto& t : tracks_)
                                   ^
mp4.cpp:295:23: warning: range-based for loop is a C++11 extension [-Wc++11-extensions]
                        for (const auto& t : tracks_)
                                           ^
mp4.cpp:401:2: error: unknown type name 'off64_t'; did you mean 'off_t'?
        off64_t offset = 0;
        ^~~~~~~
        off_t
/usr/include/sys/_types/_off_t.h:31:25: note: 'off_t' declared here
typedef __darwin_off_t          off_t;
                                ^
mp4.cpp:428:21: warning: use of enumeration in a nested name specifier is a C++11 extension [-Wc++11-extensions]
                if (g_log_mode >= LogMode::V) {
                                  ^
mp4.cpp:511:34: warning: use of enumeration in a nested name specifier is a C++11 extension [-Wc++11-extensions]
                                if (!g_muted && g_log_mode < LogMode::V) {
                                                             ^
mp4.cpp:532:21: error: no member named 'emplace_back' in 'std::__1::vector<int, std::__1::allocator<int> >'; did you mean '__emplace_back'?
                        unknown_lengths_.emplace_back(unknown_length_);
                                         ^~~~~~~~~~~~
                                         __emplace_back
/Library/Developer/CommandLineTools/usr/include/c++/v1/vector:679:10: note: '__emplace_back' declared here
    void __emplace_back(const value_type& __x) { push_back(__x); }
         ^
mp4.cpp:542:20: error: no member named 'emplace_back' in 'std::__1::vector<int, std::__1::allocator<int> >'; did you mean '__emplace_back'?
                unknown_lengths_.emplace_back(unknown_length_);
                                 ^~~~~~~~~~~~
                                 __emplace_back
/Library/Developer/CommandLineTools/usr/include/c++/v1/vector:679:10: note: '__emplace_back' declared here
    void __emplace_back(const value_type& __x) { push_back(__x); }
         ^
mp4.cpp:548:22: warning: range-based for loop is a C++11 extension [-Wc++11-extensions]
                for(const Track& t : tracks_){
                                   ^
mp4.cpp:556:6: warning: 'auto' type specifier is a C++11 extension [-Wc++11-extensions]
        for(auto& track : tracks_) {
            ^
mp4.cpp:556:18: warning: range-based for loop is a C++11 extension [-Wc++11-extensions]
        for(auto& track : tracks_) {
                        ^
20 warnings and 14 errors generated.