encode: restore audio muxer timebase use

Seems to crash hard if an error happens somewhere at init. Who cares.

Part of #7524.

2 files changed, 9 insertions, 0 deletions

diff --git a/common/encode_lavc.c b/common/encode_lavc.c
index b106e45fa0..f798a7007a 100644
--- a/common/encode_lavc.c
+++ b/common/encode_lavc.c
@@ -491,6 +491,11 @@ done:
         av_packet_unref(pkt);
 }
 
+AVRational encoder_get_mux_timebase_unlocked(struct encoder_context *p)
+{
+    return p->mux_stream->st->time_base;
+}
+
 void encode_lavc_discontinuity(struct encode_lavc_context *ctx)
 {
     if (!ctx)
diff --git a/common/encode_lavc.h b/common/encode_lavc.h
index 97c2cf01f1..390aabd1f8 100644
--- a/common/encode_lavc.h
+++ b/common/encode_lavc.h
@@ -111,6 +111,10 @@ bool encoder_init_codec_and_muxer(struct encoder_context *p,
 // Encode the frame and write the packet. frame is ref'ed as need.
 bool encoder_encode(struct encoder_context *p, AVFrame *frame);
 
+// Return muxer timebase (only available after on_ready() has been called).
+// Caller needs to acquire encode_lavc_context.lock (or call it from on_ready).
+AVRational encoder_get_mux_timebase_unlocked(struct encoder_context *p);
+
 double encoder_get_offset(struct encoder_context *p);
 
 #endif