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 ESMTPS id E4A6747895 for ; Mon, 27 Jan 2025 20:16:04 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 69DCC68BCCB; Mon, 27 Jan 2025 22:16:02 +0200 (EET) Received: from mail-ed1-f52.google.com (mail-ed1-f52.google.com [209.85.208.52]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 4CE5268B34C for ; Mon, 27 Jan 2025 22:15:55 +0200 (EET) Received: by mail-ed1-f52.google.com with SMTP id 4fb4d7f45d1cf-5dbf7d45853so1143784a12.1 for ; Mon, 27 Jan 2025 12:15:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ltnglobal-com.20230601.gappssmtp.com; s=20230601; t=1738008954; x=1738613754; darn=ffmpeg.org; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=GxF4FJBEYG3jfsG0ZHmemNwEJV+MNM+NI1xvCfkQJkg=; b=oZp31RiClEhmFCGcyRyXe2wZMVaqquRzKJQCCzG/x2VlqyzTjGSCIeoUdwxGGmv291 8aExu7HKlXKZIkWkOT6CPVRTVLfZtPACPp3lV12C0WazpWxqeyz9E3hDoMnSHy6h0nXA lgdTFwVD6myqrO1BIBb7vOm0kyqPZsArr4qG6aCsi7hf4ZYYJXdskZE3fJry3wfgFUCP FEY1fSMGmfI6u4Rfauxz0CUGld/PHU9Xft/WcM3ultuoN2QTzpXp6xd3v7s75zpS6UeM wrIxoR9Z+CjgJxL/kxuSwAgvPdljk+xkWjF1lRqyEX/GNAH/SKjR3+vaseZnOOc9qv2k knlA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738008954; x=1738613754; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=GxF4FJBEYG3jfsG0ZHmemNwEJV+MNM+NI1xvCfkQJkg=; b=DuQnAlgEBkf0tcXKxYQ2YKFRCrVn//tUQtzay2vn42LVki5ge/nCGd7QSye5yGZXrf zdDb1iquzHTctr+d/oBf9X9UhQ9KKsCmEeBFhvIlhwLJh/2RwQJFn+1JdDgYh1kYZZLy VhrNliJyAgZiGVZIs2LSv56JfLW6fMYuvgukROW0aOKchTwN8yzCBrOCf+/iCUHO2lET d2j3VT6Ka+GKc3frlB2K83i8gvmXZQL9aBLtadzzFCMTxN3XCU3aUqry4CmtGQb8ZApi qh9++hDiTQoDT+TFIXMfVRXgLssjnJIPnbYdMissoSwtqppG+6pH/kruegwy/nlkP5kl lB5A== X-Gm-Message-State: AOJu0YyyH46x07hicYkfrZN7pk+TyAyr/LnF5H0lsh3vUbYchAlN4JFp 7GkpbZQdfXkS9oQ5GlGcrrjLTEa0QlM1HI3FB9I5ill7OXEgyzaE42o/p/XBQa1U8EEZSLJVaCP RGIav+0qaVvEgaVVcSeDsTDemCEfp0QqE+Im9KgLOqsklYaP7 X-Gm-Gg: ASbGncuXLUh8uQZYr+RU/xUFrUTJ4GCEvMCY2WEgBCkxHO46UPJXToLlBcvfXQ7Q0PC gBe3arJhGejUYe3Nwbz/W847I4M35DIOtIY+vHmkFG2kaEs0JSdeC11+LrlEV X-Google-Smtp-Source: AGHT+IEsDjEURo0GsSsgtYwvDubEOppdi8y8dnfe77ECu1STWCDfteNGyKKR4HzjlQQSPVBIrf2hiBlc9ot1l1StgGk= X-Received: by 2002:a05:6402:4404:b0:5d1:11b6:2238 with SMTP id 4fb4d7f45d1cf-5db7d2dc2b9mr14712329a12.2.1738008954225; Mon, 27 Jan 2025 12:15:54 -0800 (PST) MIME-Version: 1.0 References: <20241128011514.836463-1-marth64@proxyid.net> <2f43d1e7-303c-4ff8-bd95-37a60f7d537b@passwd.hu> <61f11f5d-22d0-4223-9b21-56e5282d1b9d@gmail.com> In-Reply-To: From: Devin Heitmueller Date: Mon, 27 Jan 2025 15:15:42 -0500 X-Gm-Features: AWEUYZkodHKyvW_nN7qHy25ZR_BfHUoelIa35Wp3_yI2sso874Z96kJYpt_jkXs Message-ID: To: FFmpeg development discussions and patches Subject: Re: [FFmpeg-devel] [PATCH v2 00/11] fix broken CC detection and ffprobe fields (cover letter) 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: Marth64 , Kieran Kunhya 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: > Do you have an example stream recording? > And who are those who wouldn't be following? Broadcasters? For what it's worth, I have seen this and it can definitely happen. It's not common though since it both technically violates the spec and also not best practice (for example, some televisions won't show you the option to enable captions if the caption stream isn't present at all). Generally it occurs when the broadcaster is doing splicing of TS streams entirely in the compressed domain (e.g. for ad insertion), or cases where ads or programs don't contain captions and the encoder/transcoder isn't smart enough to generate empty caption packets and include them in the output. That said, I think it's very defensible to say, "We don't set the flag saying captions are present if not detected within the probing window". Devin -- Devin Heitmueller, Senior Software Engineer LTN Global Communications o: +1 (301) 363-1001 w: https://ltnglobal.com e: devin.heitmueller@ltnglobal.com _______________________________________________ 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".