fftools/ffmpeg_opt: Don't duplicate array unnecessarily

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/fftools/ffmpeg.h b/fftools/ffmpeg.h
index 21c63415d6..a20ca964fb 100644
--- a/fftools/ffmpeg.h
+++ b/fftools/ffmpeg.h
@@ -273,9 +273,10 @@ typedef struct OutputFilter {
     uint64_t channel_layout;
 
     // those are only set if no format is specified and the encoder gives us multiple options
-    int *formats;
-    uint64_t *channel_layouts;
-    int *sample_rates;
+    // They point directly to the relevant lists of the encoder.
+    const int *formats;
+    const uint64_t *channel_layouts;
+    const int *sample_rates;
 } OutputFilter;
 
 typedef struct FilterGraph {