This adds a time_base field (currently unused), analogue to the
AVPacket.time_base field.
This allows for API clients to exchange AVFrames directly, without
needing to plumb extra data from sources via side mechanisms.
Patch attached.
>From 7a5b8fe31ff7e193ddd776daf8aac1c2c528d8d2 Mon Sep 17 00:00:00 2001
From: Lynne <d...@lynne.ee>
Date: Thu, 25 Nov 2021 18:26:20 +0100
Subject: [PATCH] lavu/avframe: add a time_base field
This adds a time_base field (currently unused), analogue to the
AVPacket.time_base field.
---
libavutil/frame.c | 2 ++
libavutil/frame.h | 6 ++++++
2 files changed, 8 insertions(+)
diff --git a/libavutil/frame.c b/libavutil/frame.c
index d4d3ad6988..64eed5b0dd 100644
--- a/libavutil/frame.c
+++ b/libavutil/frame.c
@@ -63,6 +63,7 @@ static void get_frame_defaults(AVFrame *frame)
frame->pkt_duration = 0;
frame->pkt_pos = -1;
frame->pkt_size = -1;
+ frame->time_base = (AVRational){ 0, 1 };
frame->key_frame = 1;
frame->sample_aspect_ratio = (AVRational){ 0, 1 };
frame->format = -1; /* unknown */
@@ -278,6 +279,7 @@ static int frame_copy_props(AVFrame *dst, const AVFrame *src, int force_copy)
dst->pkt_pos = src->pkt_pos;
dst->pkt_size = src->pkt_size;
dst->pkt_duration = src->pkt_duration;
+ dst->time_base = src->time_base;
dst->reordered_opaque = src->reordered_opaque;
dst->quality = src->quality;
dst->best_effort_timestamp = src->best_effort_timestamp;
diff --git a/libavutil/frame.h b/libavutil/frame.h
index 753234792e..66fe3070f8 100644
--- a/libavutil/frame.h
+++ b/libavutil/frame.h
@@ -421,6 +421,12 @@ typedef struct AVFrame {
*/
int64_t pkt_dts;
+ /**
+ * Time base for the timestamps in this frame. May be 0, in which case the
+ * time_base from the frame source should be used.
+ */
+ AVRational time_base;
+
/**
* picture number in bitstream order
*/
--
2.34.0
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