Signed-off-by: Raphaël Zumer <[email protected]>
---
libavformat/ivfenc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/libavformat/ivfenc.c b/libavformat/ivfenc.c
index adf72117e9..ae461a872b 100644
--- a/libavformat/ivfenc.c
+++ b/libavformat/ivfenc.c
@@ -53,7 +53,7 @@ static int ivf_write_header(AVFormatContext *s)
avio_wl16(pb, par->height);
avio_wl32(pb, s->streams[0]->time_base.den);
avio_wl32(pb, s->streams[0]->time_base.num);
- avio_wl64(pb, 0xFFFFFFFFFFFFFFFFULL);
+ avio_wl64(pb, 0xFFFFFFFFFFFFFFFFULL); // length is overwritten at the end
of muxing
return 0;
}
@@ -83,6 +83,7 @@ static int ivf_write_trailer(AVFormatContext *s)
size_t end = avio_tell(pb);
avio_seek(pb, 24, SEEK_SET);
+ // overwrite the "length" field (duration)
avio_wl64(pb, ctx->frame_cnt * ctx->sum_delta_pts / (ctx->frame_cnt -
1));
avio_seek(pb, end, SEEK_SET);
}
--
2.23.0
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