[PATCH 1/2] av_ff_common: attempt to fix encodings for ffprobe/avprobe

[Eric Wong <e@80x24.org>]

As with sox, these will be dealing with legacy encodings
and badly-encoding software until the end of days, so do
our best to fix them up.
---
 lib/dtas/source/av_ff_common.rb | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/lib/dtas/source/av_ff_common.rb b/lib/dtas/source/av_ff_common.rb
index 5299fdb..332a0bb 100644
--- a/lib/dtas/source/av_ff_common.rb
+++ b/lib/dtas/source/av_ff_common.rb
@@ -104,13 +104,14 @@ def av_ff_ok?
       prev_cmd = cmd
     end while incomplete.compact[0]
 
+    enc = Encoding.default_external # typically Encoding::UTF_8
     # old avprobe
     s.scan(%r{^\[FORMAT\]\n(.*?)\n\[/FORMAT\]\n}m) do |_|
       f = $1.dup
       f =~ /^duration=([\d\.]+)\s*$/nm and @duration = $1.to_f
       # TODO: multi-line/multi-value/repeated tags
       f.gsub!(/^TAG:([^=]+)=(.*)$/ni) { |_|
-        @comments[$1.upcase] = -($2)
+        @comments[-DTAS.try_enc($1.upcase, enc)] = $2
       }
     end
 
@@ -118,13 +119,17 @@ def av_ff_ok?
     s.scan(%r{^\[format\.tags\]\n(.*?)\n\n}m) do |_|
       f = $1.dup
       f.gsub!(/^([^=]+)=(.*)$/ni) { |_|
-        @comments[$1.upcase] = -$2
+        @comments[-DTAS.try_enc($1.upcase, enc)] = $2
       }
     end
     s.scan(%r{^\[format\]\n(.*?)\n\n}m) do |_|
       f = $1.dup
       f =~ /^duration=([\d\.]+)\s*$/nm and @duration = $1.to_f
     end
+    comments.each do |k,v|
+      v.chomp!
+      comments[k] = -DTAS.try_enc(v, enc)
+    end
 
     ! @astreams.compact.empty?
   end