fontconfig | check install for compilation and installation instructions

Instagram apparently does not like MP3. Use AAC instead. Replace -acodec libmp3lame/-c:a libmp3lame with -c:a aac.

Your file seems to be missing some color information:

From your log I can see that your input audio is MP3.

The forfiles command is a nasty beast, because there are several caveats:

• it is slow (particularly because it cannot run internal commands of the hosting command prompt);
• it handles wildcards differently than most other commands, hence /M *.* does not match all files but only such with an extension; to really match all files, use /M * or skip it since it is the default anyway;
• it applies backslash-escaping, which is particularly annoying with paths ending in \, like the root directory of a drive /P "D:\", which causes a syntax error since the closing quotation mark is considered as escaped; to work around that, preferably append a . like /P "D:\.", or remove the quotation marks like /P D:\, though this exposes potential whitespaces or special characters to the parser;
• all of the special @-variables that return the path and/or name of iterated items provide the values in quoted manner, which is particularly frustrating when it comes to concatenation;
• it iterates over both files and directories that match the given mask; to distinguish between them you could use the special @isdir variable, but you will need an if statement for this (like if @isdir==FALSE or if @isdir==TRUE), which is an internal cmd.exe command, requiring its explicit instantiation even when you would not need it else;
• handling of the command behind /C and its arguments is terribly implemented, leading to the problem that directly running external commands (so without cmd /C) may fail, unless you are aware of the mostly working fix by stating the command name twice (like /C "command.exe command.exe --parameter argument");
• even its basically nice /D option (which is the only reason why forfiles might suit better than for) to filter for the relative last modification date (but not time) is badly implemented when a positive number (like /D +1) is used, because this uselessly points to the future;

All of these issues lead me to the point that I suggest not to use forfiles and to use a standard for loop instead, like this (note also the changed mask *.flac):

• In a batch-file:

For H.264, nvenc has a max. resolution limit of 4096x4096. Use a software encoder like libx264. But note that a resolution of 7200x3600 is beyond the limit of any valid H.264 level so hope your target player doesn't care. Or use HEVC with different parameters.

I assume that you are using the package "wait-on" (https://www.npmjs.com/package/wait-on). The wait-on command is used without npm in front of it.

Try to use

It looks like fonts_dir should include the font file name.

Instead of fonts_dir = "fonts-main/apache", try:

You forgot a ". Try:

Actually --enable-shared=no works fine, no .so files are copied into /usr/local/lib!

So, I can use --enable-shared=no instead of --disable-shared.