avfilter/vf_telecine: avoid possible null-pointer dereference

ce24b1de · Paul B Mahol · 5633f9a8 · ce24b1de
Commit ce24b1de authored Apr 14, 2020 by Paul B Mahol
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vf_telecine.c libavfilter/vf_telecine.c +2 -2

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--- a/libavfilter/vf_telecine.c
+++ b/libavfilter/vf_telecine.c
@@ -240,8 +240,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)

    for (i = 0; i < nout; i++) {
        AVFrame *frame = av_frame_clone(s->frame[i]);
-        int interlaced = frame->interlaced_frame;
-        int tff        = frame->top_field_first;
+        int interlaced = frame ? frame->interlaced_frame : 0;
+        int tff        = frame ? frame->top_field_first  : 0;

        if (!frame) {
            av_frame_free(&inpicref);