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lavfi/thumbnail: replace frame unref with free.
Fixes memleak spotted by FATE.
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@ -113,7 +113,7 @@ static AVFrame *get_best_frame(AVFilterContext *ctx)
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for (i = 0; i < nb_frames; i++) {
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memset(thumb->frames[i].histogram, 0, sizeof(thumb->frames[i].histogram));
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if (i != best_frame_idx)
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av_frame_unref(thumb->frames[i].buf);
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av_frame_free(&thumb->frames[i].buf);
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}
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thumb->n = 0;
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@ -162,7 +162,7 @@ static av_cold void uninit(AVFilterContext *ctx)
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int i;
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ThumbContext *thumb = ctx->priv;
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for (i = 0; i < thumb->n_frames && thumb->frames[i].buf; i++)
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av_frame_unref(thumb->frames[i].buf);
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av_frame_free(&thumb->frames[i].buf);
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av_freep(&thumb->frames);
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}
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