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 5C5614629F for ; Thu, 14 Mar 2024 17:57:51 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id B501668D154; Thu, 14 Mar 2024 19:57:48 +0200 (EET) Received: from srv-infra-1.infra.inf.glb.tvvideoms.com (www.inf.tvvideoms.com [213.205.126.156]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 3B3EF68CC5A for ; Thu, 14 Mar 2024 19:57:42 +0200 (EET) Received: from cji.paris (unknown [172.16.3.159]) by srv-infra-1.infra.inf.glb.tvvideoms.com (Postfix) with ESMTP id E612520309; Thu, 14 Mar 2024 17:57:40 +0000 (UTC) From: Nicolas Gaullier To: ffmpeg-devel@ffmpeg.org Date: Thu, 14 Mar 2024 18:57:38 +0100 Message-Id: <20240314175739.1499196-1-nicolas.gaullier@cji.paris> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH 0/1] avformat/demux: Fix accurate probing of durations in mpegts/ps 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: Nicolas Gaullier 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: ff_read_packet() is more lightweight, but it leads to important issues when looking for accurate durations. As a side effect, the code looks also simpler with regular av_read_frame() calls. 1) Updates in the fate tests do exhibit most of the results. 2) See also more directly the case of an audio PES containing many frames: >ffprobe tests/data/lavf/lavf.ts -select_streams a -show_entries stream=duration -of flat Before patch: streams.stream.0.duration="0.757556" After patch: streams.stream.0.duration="1.018778" 3) Here is an additional (commonplace) sample to demonstrate the benefit for twofields-encoded video: https://0x0.st/HFbm.ts (say h264-50i_mp2.ts) >ffprobe h264-50i_mp2.ts -show_entries stream=duration -of flat Before patch: streams.stream.0.duration="2.060000" streams.stream.1.duration="1.176000" After patch: streams.stream.0.duration="2.080000" streams.stream.1.duration="1.200000" Nicolas Gaullier (1): avformat/demux: Fix accurate probing of durations in mpegts/ps libavformat/demux.c | 30 +--- tests/ref/fate/concat-demuxer-simple2-lavf-ts | 170 +++++++++--------- tests/ref/fate/ts-opus-demux | 4 +- 3 files changed, 93 insertions(+), 111 deletions(-) -- 2.30.2 _______________________________________________ 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".