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 3F397410D6 for ; Sun, 13 Feb 2022 23:33:54 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id AD5EA68B2E5; Mon, 14 Feb 2022 01:33:52 +0200 (EET) Received: from mail-ua1-f47.google.com (mail-ua1-f47.google.com [209.85.222.47]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 1E4A368AFF7 for ; Mon, 14 Feb 2022 01:33:47 +0200 (EET) Received: by mail-ua1-f47.google.com with SMTP id v5so7294857uam.3 for ; Sun, 13 Feb 2022 15:33:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=message-id:date:mime-version:user-agent:subject:content-language:to :cc:references:from:in-reply-to:content-transfer-encoding; bh=WRF909rQqVCzoNCywRbsIEg4Dfn4kB3rUeKZIKOWGiw=; b=Y0eagv1iokrF8b8LlDieRcJur9nWHY6my34/AC3uvwWbGBG6ky2xerrmKr2fGTinTi lmfxiWTXFr/QVX2QuBP0HNnFe2HBar6ZQ3wFbz+sFuanz3+5tUw8x0uZr7Ya9aZv8MRj u5FD3fI/mnJxZVwDdyjf0QvctTPzqKjJ4bXUFaWNhhYyJGyHEcMWgWlI1kM+UhrXY+6K oYDXtc7B4k8ojUJvUpYnMfu3tVAS4q1qmU+OaGEzo+IQTQjCGbGzxp7G2nAEvqkD8PtM hinZPkcemWzFbVZvnTBmFBr3EfUQuMyOqsZnVuFqYk/YhBhQaNwiOaQjO2O2uzuwkovN m7wg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=WRF909rQqVCzoNCywRbsIEg4Dfn4kB3rUeKZIKOWGiw=; b=ebXt0bMVwdcvgmjdu8ijmC+xOJJaYBDbMtOjBoZHIzhXNx2LRpPo1DEzBzM0XC+o/w asAGTo3VAswZqEcS+fzuHQqfKM1k6cpj2PK1taF5cR94exLxuLuAvcBkTWmr25u60IM+ 5NIfmzon7Z4pkcgUHbXr4M0mAI8kkq7fbKgtTGK4niY0DT+UFsPKrjvNQF8HpvHwfZw1 WaGcJnph1+Cd8VIm1xSJFLqXWHTo7F2X6XcIdcvHZy4mLoTSE0fTtlPE6ykNjTCaNVr6 1xRn8A4jlpP6XE2/tOBBdfB/0u+xWORwdeyMwLk6rzOcRTJ4M+FCwfNIFqisprwAEI6e Vamw== X-Gm-Message-State: AOAM530mrdJtBnk/5dkn0/TAzqm1zTk9We3E2IwfFslcn2A6kq+m8jXI fJvorJJcztnmLlt4vxv0Xw6RPrCiT0Q= X-Google-Smtp-Source: ABdhPJz3vyCPQr8LAN8pgm0N42QeeYncZjsdHLKNEE2XbvPwRNRkvInijDk+SsNty7qS09lgXiGNiQ== X-Received: by 2002:ab0:6cb7:: with SMTP id j23mr3045801uaa.36.1644795225464; Sun, 13 Feb 2022 15:33:45 -0800 (PST) Received: from [192.168.1.5] ([75.115.109.114]) by smtp.gmail.com with ESMTPSA id 4sm5290394vkx.4.2022.02.13.15.33.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 13 Feb 2022 15:33:45 -0800 (PST) Message-ID: Date: Sun, 13 Feb 2022 18:33:44 -0500 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Content-Language: en-US To: ffmpeg-devel@ffmpeg.org References: <20220208110240.4179-1-qyot27@gmail.com> <20220208110240.4179-2-qyot27@gmail.com> From: Stephen Hutchinson In-Reply-To: <20220208110240.4179-2-qyot27@gmail.com> Subject: Re: [FFmpeg-devel] [PATCH 1/3] avisynth: corrected interlace detection 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 Cc: emcodem Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: On 2/8/22 6:02 AM, Stephen Hutchinson wrote: > From: emcodem > > AviSynth works on frame-based video by default, which can > be either progressive or interlaced. Some filters can break > frames into half-height fields, at which point it considers > the clip to be field-based (avs_is_field_based can be used > to check for this situation). > > To properly detect the field order of a typical video clip, > the frame needs to have been weaved back together already, > so avs_is_field_based should actually report 'false' when > checked. > > Signed-off-by: Stephen Hutchinson > --- > libavformat/avisynth.c | 11 ++++------- > 1 file changed, 4 insertions(+), 7 deletions(-) > > diff --git a/libavformat/avisynth.c b/libavformat/avisynth.c > index 350ac6d11d..1e862a6a85 100644 > --- a/libavformat/avisynth.c > +++ b/libavformat/avisynth.c > @@ -250,15 +250,12 @@ static int avisynth_create_stream_video(AVFormatContext *s, AVStream *st) > st->nb_frames = avs->vi->num_frames; > avpriv_set_pts_info(st, 32, avs->vi->fps_denominator, avs->vi->fps_numerator); > > - av_log(s, AV_LOG_TRACE, "avs_is_field_based: %d\n", avs_is_field_based(avs->vi)); > - av_log(s, AV_LOG_TRACE, "avs_is_parity_known: %d\n", avs_is_parity_known(avs->vi)); > > - /* The following typically only works when assumetff (-bff) and > - * assumefieldbased is used in-script. Additional > - * logic using GetParity() could deliver more accurate results > - * but also decodes a frame which we want to avoid. */ > st->codecpar->field_order = AV_FIELD_UNKNOWN; > - if (avs_is_field_based(avs->vi)) { > + /* AviSynth works with frame-based video, detecting field order can > + * only work when avs_is_field_based returns 'false'. */ > + av_log(s, AV_LOG_TRACE, "avs_is_field_based: %d\n", avs_is_field_based(avs->vi)); > + if (avs_is_field_based(avs->vi) == 0) { > if (avs_is_tff(avs->vi)) { > st->codecpar->field_order = AV_FIELD_TT; > } Pushed. _______________________________________________ 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".