ffmpeg | branch: master | Paul B Mahol <[email protected]> | Fri Mar  4 13:33:05 
2022 +0100| [dc8e83b4e01cb4e0d3f6fa1d181e0b7d1a89c191] | committer: Paul B Mahol

avfilter/f_ebur128: make sure frame is writable before writing to it

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=dc8e83b4e01cb4e0d3f6fa1d181e0b7d1a89c191
---

 libavfilter/f_ebur128.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavfilter/f_ebur128.c b/libavfilter/f_ebur128.c
index 35fe9bc6be..1149b2a9cd 100644
--- a/libavfilter/f_ebur128.c
+++ b/libavfilter/f_ebur128.c
@@ -818,6 +818,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame 
*insamples)
                 y_loudness_lu_graph = lu_to_y(ebur128, loudness_3000 - 
ebur128->target);
                 y_loudness_lu_gauge = lu_to_y(ebur128, gauge_value);
 
+                av_frame_make_writable(pic);
                 /* draw the graph using the short-term loudness */
                 p = pic->data[0] + ebur128->graph.y*pic->linesize[0] + 
ebur128->graph.x*3;
                 for (y = 0; y < ebur128->graph.h; y++) {

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