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

This commit is contained in:
Paul B Mahol 2022-03-04 13:33:05 +01:00
parent aede8424fe
commit dc8e83b4e0
1 changed files with 1 additions and 0 deletions

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@ -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++) {