From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by master.gitmailbox.com (Postfix) with ESMTP id 71F4A47A0A for ; Sat, 30 Dec 2023 02:49:27 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id D131368CC45; Sat, 30 Dec 2023 04:49:16 +0200 (EET) Received: from relay6-d.mail.gandi.net (relay6-d.mail.gandi.net [217.70.183.198]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id D8F3B68C118 for ; Sat, 30 Dec 2023 04:49:09 +0200 (EET) Received: by mail.gandi.net (Postfix) with ESMTPSA id 1EB24C0002 for ; Sat, 30 Dec 2023 02:49:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=niedermayer.cc; s=gm1; t=1703904549; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:in-reply-to:in-reply-to:references:references; bh=gMFgKFT/eileEZs1NHN+4es1SrEFENYgCTNnlQzAPMs=; b=gvZFq5NQ5+Ug32GCkV3auYaTr276CpktrObYK7EuNJrVZX6Hf45la5ZCI1JE+3IZX3fOu0 N3creXW7bnAr2+qNGeK1uaVco3uLXMHCu+c5qBqmzCYXLVZTeRfhQbqUoc0JInXQKc3gry +PH+AKXjFPJynY5HDmnZ3gABf58PUIqZPlNZcmeQXrZyFfpJVXRIok+2Ycyd9hd+2Yb0oI FuPn0Ik0p5o7Ld7RrawR+uBiFYC6lTEy5pn5yd7jh3Pj0seKCHbDCCNpVd+fisWs0n/xmv ExAOLXrBQTyJfKK9XtH1Bvpnvp1drJnRyKfNVg9SHcNQygNfUwd2bYStj/rLLw== From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Sat, 30 Dec 2023 03:49:03 +0100 Message-Id: <20231230024905.17121-2-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20231230024905.17121-1-michael@niedermayer.cc> References: <20231230024905.17121-1-michael@niedermayer.cc> X-GND-Sasl: michael@niedermayer.cc Subject: [FFmpeg-devel] [PATCH 2/4] avfilter/vf_minterpolate: Check pts before division X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: Fixes: FPE Fixes: tickets/10758/poc20ffmpeg Discovered by Zeng Yunxiang Signed-off-by: Michael Niedermayer --- libavfilter/vf_minterpolate.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/libavfilter/vf_minterpolate.c b/libavfilter/vf_minterpolate.c index 9920210eced..c7b6f325f8d 100644 --- a/libavfilter/vf_minterpolate.c +++ b/libavfilter/vf_minterpolate.c @@ -1075,8 +1075,13 @@ static void interpolate(AVFilterLink *inlink, AVFrame *avf_out) pts = av_rescale(avf_out->pts, (int64_t) ALPHA_MAX * outlink->time_base.num * inlink->time_base.den, (int64_t) outlink->time_base.den * inlink->time_base.num); - alpha = (pts - mi_ctx->frames[1].avf->pts * ALPHA_MAX) / (mi_ctx->frames[2].avf->pts - mi_ctx->frames[1].avf->pts); - alpha = av_clip(alpha, 0, ALPHA_MAX); + if (mi_ctx->frames[2].avf->pts > mi_ctx->frames[1].avf->pts) { + alpha = (pts - mi_ctx->frames[1].avf->pts * ALPHA_MAX) / (mi_ctx->frames[2].avf->pts - mi_ctx->frames[1].avf->pts); + alpha = av_clip(alpha, 0, ALPHA_MAX); + } else { + av_log(ctx, AV_LOG_DEBUG, "duplciate input PTS detected\n"); + alpha = 0; + } if (alpha == 0 || alpha == ALPHA_MAX) { av_frame_copy(avf_out, alpha ? mi_ctx->frames[2].avf : mi_ctx->frames[1].avf); -- 2.17.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".