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avfilter/af_join: do not dereference possible null pointer

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This commit is contained in:
Paul B Mahol 2022-03-31 00:46:47 +02:00
parent f9db470f25
commit 55e509b094
1 changed files with 2 additions and 1 deletions
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libavfilter/af_join.c
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@ -586,6 +586,7 @@ static int activate(AVFilterContext *ctx)
} }
} }
if (s->input_frames[0])
nb_samples = s->input_frames[0]->nb_samples; nb_samples = s->input_frames[0]->nb_samples;
for (i = 1; i < ctx->nb_inputs && nb_samples > 0; i++) { for (i = 1; i < ctx->nb_inputs && nb_samples > 0; i++) {