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 3B2364E92E for ; Tue, 18 Mar 2025 12:59:37 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 9F589687A61; Tue, 18 Mar 2025 14:59:05 +0200 (EET) Received: from out203-205-221-205.mail.qq.com (out203-205-221-205.mail.qq.com [203.205.221.205]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id DDBBE6879E4 for ; Tue, 18 Mar 2025 14:58:57 +0200 (EET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foxmail.com; s=s201512; t=1742302729; bh=Suw8NBPrN4kS9b9SAMY5MSFJjTuXReCYSQubcG3ehuQ=; h=From:To:Cc:Subject:Date; b=F3wLr4tsqN2SI3o62rikb0SFNOkP+O+rOZ5HHuJDvj3WAs8qscZR6SWSQPdvsG0Bg Ue6R20PgqU2KOJQfOG9Gqy6wyJ39qa1ApqTW/FBh7QLa0ifjtloSNd/d4cABedWGed MKQfxbxrM8/IxcnsCZCRzEJsrgg8CNjpG12B/Be0= Received: from localhost.localdomain ([119.147.10.242]) by newxmesmtplogicsvrszc16-0.qq.com (NewEsmtp) with SMTP id EB0210F5; Tue, 18 Mar 2025 20:58:48 +0800 X-QQ-mid: xmsmtpt1742302728th9s7b60w Message-ID: X-QQ-XMAILINFO: OIJV+wUmQOUAiQFoH5KOByzClTqz1wVky4FdftmWk3Pyab0Sm0jGOWxkmvKaQu JCd0XHnepeKxofeGMyHAJxLopby4LNs25M2rmDa+Lzgi6+ZGSB0MqtA81ePdiGc9kk1GjYmfA9Po UVUhxLgUXYiltnDl7ZlW29ifwtxA3Ir53rXS8HNntJtI+PKiw3P/NZpIhfA4mhslTrgg255AGIny M8pLgsEDXhdYG6PPDOHGZkMiq8fqCLj0IURbRJ1bVtY/ct41xRP8aqYxGCLoBVljlXLzMfhUXsCA tUAaGFn8/+BjwWrqfwSng+iu77Ag2OmGLtqHlxBPN1Zt5Lt1v1J9/CceNaokYQ2k/H5tqjx7PtJL iHM3DtUlV41gZrl+Vv2RNEZeFO4Fou7cIjsuqEc80aDLreqOnUn0fNxpk1h/DX2fgZsEyXCNsxAu AMa/e4yvbtiSQC/cpKVA84qjamCEdHMGXwHBA7EdM8J+JtG9TdRhJYWnrBlwOPjgljfO158PqCYb eXvIwYU7/nDtGIw9e7vdHAscR1QJpNsRTu1nFQvBa1cjnIT19y1tdTePyyG7+rcki/1F1QEcZ6Gh zZam9phXOqh/S4WLp6oxG8n9MKbzITdGqkEo1VyqpKsv755XhdaXU8g+g7voy8APqV9hT8dDzBMw IgVhMfFjF7tWQlRWcvCaYxo+rwIyhpXbnGj5VjZOnZ+P5U60Lj01fnqLBn9H3/cs2V5tzJSsZRd4 SwXox3hupez+V3+6+75T6EHl8iPzbvLy/nZhR8NgP/8JXBgJiqtJWSyBLZpVZQyajrq1X7Tb2GYp xW0RV1uqfJWwn358PV9JJOV12peiR26UVmWchurPxc6xyseN0yXAg/575C6iR8rBhhXl5ViLjqf4 GzHvrlJ3Or3oAZ4eBF4ftLLmzaFv1v/+9jE7Tmy86p9DtD9Ht83HOAyIa7dUEmx2Dm3564dpAKrI j/1pzv4CfGDUWo1h8HH8NIkoSTbTLdXKAFRG8PftNrgZdIuo41I7z2qIqaGicOh4U+shxVsDgx3i 3araFfKXg5mn/LhnBIvrgulF2EZwI= X-QQ-XMRINFO: Mp0Kj//9VHAxr69bL5MkOOs= From: Zhao Zhili To: ffmpeg-devel@ffmpeg.org Date: Tue, 18 Mar 2025 20:58:47 +0800 X-OQ-MSGID: <20250318125847.11023-1-quinkblack@foxmail.com> X-Mailer: git-send-email 2.46.0 MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH 4/6] avcodec/packet: Add AV_PKT_FLAG_NEW_SEQUENCE flag 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: Zhao Zhili 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: From: Zhao Zhili Sometimes AV_PKT_FLAG_KEY is the start of a new sequence, sometimes it's not. For example, HEVC CRA NALU can be marked as keyframe. hevc decoder doesn't check AV_PKT_FLAG_KEY, and doesn't treat CRA as new sequence. But sometimes CRA is really the start of a new sequence, and the decoder should flush all pictures out, e.g., after a rewind by mp4 editlist. AV_PKT_FLAG_KEY works with no problem for seek, AV_PKT_FLAG_NEW_SEQUENCE works for rewind inside demuxer, that is, no explicit flush on decoder. --- libavcodec/packet.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/libavcodec/packet.h b/libavcodec/packet.h index c1f1ad7b43..331c66d7aa 100644 --- a/libavcodec/packet.h +++ b/libavcodec/packet.h @@ -612,6 +612,16 @@ typedef struct AVPacketList { */ #define AV_PKT_FLAG_DISPOSABLE 0x0010 +/** + * Flag is used to indicate the start of a new sequence. + * + * For example, HEVC CRA can be handled differently depending on whether it's + * the start of a new sequence or not. + * + * A new sequence can be created by timeline map in mp4 editlist. + */ +#define AV_PKT_FLAG_NEW_SEQUENCE 0x0020 + enum AVSideDataParamChangeFlags { AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE = 0x0004, AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS = 0x0008, -- 2.46.0 _______________________________________________ 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".