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[79.124.17.100]) by mx.google.com with ESMTP id a62si7032371wmf.30.2018.05.01.08.49.34; Tue, 01 May 2018 08:49:35 -0700 (PDT) Received-SPF: pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) client-ip=79.124.17.100; Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@gmail.com header.s=20161025 header.b=VEu/sAcU; spf=pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) smtp.mailfrom=ffmpeg-devel-bounces@ffmpeg.org; dmarc=fail (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 9040968A0B6; Tue, 1 May 2018 18:49:00 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from mail-wm0-f65.google.com (mail-wm0-f65.google.com [74.125.82.65]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 0EE70689C88 for ; Tue, 1 May 2018 18:48:54 +0300 (EEST) Received: by mail-wm0-f65.google.com with SMTP id j5so19681287wme.5 for ; Tue, 01 May 2018 08:49:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id; bh=ygQ7tXC8swL337tqV37BBk8FCVPdlDOdwXT30zlkyWQ=; b=VEu/sAcUJr9FpBYuQNWf/hwvBpGYCXSi5m/0j97EoepYJYRibVQgqbLsnHWbKYjjqJ 8IbZylS9lBlkzhbBojCnFKjeZyJ7I8wIl95FiwdhNV5BVOg9To9QbAJSZWttG6+pnCTO eH40nC92Px28B3mX/WUiGdBdHtpVGCMes9WTJDJq4qXCafuTd06mRtdQwBUaciej1gVd 2UGiZXYyEeFDaCfc73+TJuHM0h9C/oFFh037OVBsztQ1kBV+80LsdJcItmVoXvxsp1A+ 6RlVwpJfHqlhZp5gC9pJL7ZMoG5BrEMVo6gG3jKOjgnByiN49fXtbQuwCxj3TSSFZ+uR 6Y5A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id; bh=ygQ7tXC8swL337tqV37BBk8FCVPdlDOdwXT30zlkyWQ=; b=SrtazsEtVQ98gRnD7Up8JcIEDaenavQkFh6rn+p476VFW65lG0RzENk6rhSgOVbGvy HpClNxg+/snP4aSu0aiOm3kYjrNc/5PDCF2dBTErLq92SZftgQ9itChWMatNIhxG7GnE 0BmK7axdMVEpdeJEQKlPgOq81Ioa6x+87xQRAeFRdK3v54G4W54M7Hv2dKDW4FpifZR/ OxHjgAh6Gi0o2YCYtlFUxj9SAQloCU/b+gZxjfeFm31AciYQBYyk4K5LtiwK7GNdFE+C J4tZUFdWvx+9l01AdmzBu7lgkbMY85jervx2pral8QgTxrzsa/3I3Ef57XGsanY1FGui RBfw== X-Gm-Message-State: ALQs6tCI6uCBypzK1Wxf7AQXspMiPIWWCxVNtO20sgH2bgeY41BHNv8e hUgQjREbqoIkz4IzioQeyed7DQ== X-Received: by 10.28.36.139 with SMTP id k133mr9551478wmk.38.1525189765345; Tue, 01 May 2018 08:49:25 -0700 (PDT) Received: from localhost.localdomain ([94.250.174.60]) by smtp.gmail.com with ESMTPSA id l1-v6sm7765256wre.54.2018.05.01.08.49.24 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 01 May 2018 08:49:24 -0700 (PDT) From: Paul B Mahol To: ffmpeg-devel@ffmpeg.org Date: Tue, 1 May 2018 17:48:32 +0200 Message-Id: <20180501154832.14192-1-onemda@gmail.com> X-Mailer: git-send-email 2.11.0 Subject: [FFmpeg-devel] [PATCH] avformat/yuv4mpegdec: simplify math X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.20 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 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" This one actually works with hd1080 y4m files when seeking backwards. Signed-off-by: Paul B Mahol --- libavformat/yuv4mpegdec.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/libavformat/yuv4mpegdec.c b/libavformat/yuv4mpegdec.c index 8662a42a4c..de3d5637fe 100644 --- a/libavformat/yuv4mpegdec.c +++ b/libavformat/yuv4mpegdec.c @@ -317,11 +317,9 @@ static int yuv4_read_seek(AVFormatContext *s, int stream_index, AVStream *st = s->streams[0]; int64_t pos; - pos = av_rescale_rnd(pts * s->packet_size, - st->time_base.num, - st->time_base.den * s->packet_size, - (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP); - pos *= s->packet_size; + if (flags & AVSEEK_FLAG_BACKWARD) + pts -= 1; + pos = pts * s->packet_size; if (avio_seek(s->pb, pos + s->internal->data_offset, SEEK_SET) < 0) return -1;