diff --git a/server/src/cache/transcoder.ts b/server/src/cache/transcoder.ts
index 8825c20..3e3f7b9 100755
--- a/server/src/cache/transcoder.ts
+++ b/server/src/cache/transcoder.ts
@@ -158,6 +158,9 @@ export class Transcoder {
           'libx264',
           '-bsf:v',
           'h264_mp4toannexb',
+          // Now defaults to high 10 currently unsupported in Firefox
+          '-profile:v',
+          'high',
           '-tune',
           'film',
           ...(realtime ? ['-quality', 'realtime', '-preset', 'ultrafast'] : ['-quality', 'good', '-preset', 'medium']),