Alleggerisce il relay YouTube e rilascia Android 2.0.8.

ffmpeg fa solo remux copy A/V; le app fissano AAC 48 kHz mono; sync deploy non cancella più garage.prod.toml.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/services/streams/youtube_relay.rb

@@ -116,31 +116,30 @@ module Streams
         raise Error, "ffmpeg non disponibile: #{e.message}"
       end
 
-      # RTMP grezzo da telefono (overlay bruciato lato app); fallback HLS via proxy Rails.
+      # Remux verso YouTube: video+audio copy (AAC già da app/slate a 48k mono).
+      # HLS (ADTS) → FLV richiede -bsf:a aac_adtstoasc; RTMP ha già ASC in FLV tags.
       def youtube_ffmpeg_args(intake_source, output)
         mode, url = intake_source
+        common_head = [
+          "ffmpeg", "-nostdin", "-hide_banner", "-loglevel", "warning",
+          "-fflags", "+genpts+discardcorrupt"
+        ]
+        copy_tail = ["-c:v", "copy", "-c:a", "copy", "-f", "flv", output]
+
         if mode == :rtmp
-          return [
-            "ffmpeg", "-nostdin", "-hide_banner", "-loglevel", "warning",
-            "-fflags", "+genpts+discardcorrupt",
+          return common_head + [
             "-analyzeduration", "10000000", "-probesize", "10000000",
             "-rw_timeout", "15000000",
-            "-i", url,
-            "-c:v", "copy",
-            "-c:a", "aac", "-b:a", "128k", "-ar", "48000", "-ac", "1",
-            "-bsf:a", "aac_adtstoasc",
-            "-f", "flv", output
-          ]
+            "-i", url
+          ] + copy_tail
         end
 
-        [
-          "ffmpeg", "-nostdin", "-hide_banner", "-loglevel", "warning",
-          "-fflags", "+genpts+discardcorrupt",
+        common_head + [
           "-rw_timeout", "15000000",
           "-live_start_index", "-1",
           "-i", url,
           "-c:v", "copy",
-          "-c:a", "aac", "-b:a", "128k", "-ar", "48000", "-ac", "1",
+          "-c:a", "copy",
           "-bsf:a", "aac_adtstoasc",
           "-f", "flv", output
         ]