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[91.153.198.187]) by smtp.gmail.com with ESMTPSA id s9-20020a19ad49000000b004eafa77e435sm2679216lfd.146.2023.04.11.13.18.55 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Apr 2023 13:18:55 -0700 (PDT) From: =?UTF-8?q?Jan=20Ekstr=C3=B6m?= To: ffmpeg-devel@ffmpeg.org Date: Tue, 11 Apr 2023 23:18:47 +0300 Message-Id: <20230411201847.26564-1-jeebjp@gmail.com> X-Mailer: git-send-email 2.40.0 MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH] avfilter/vsrc_ddagrab: add option to control pts offset removal 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 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: This keeps the default behavior as-is by defaulting to true, while allowing to start the timestamps with the offset from av_gettime_relative epoch start. This allows for synchronization with other capture modules that utilize the same epoch start, such as DShow audio capture. --- libavfilter/vsrc_ddagrab.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/libavfilter/vsrc_ddagrab.c b/libavfilter/vsrc_ddagrab.c index 042842104f..14fb4abd10 100644 --- a/libavfilter/vsrc_ddagrab.c +++ b/libavfilter/vsrc_ddagrab.c @@ -100,6 +100,7 @@ typedef struct DdagrabContext { int out_fmt; int allow_fallback; int force_fmt; + int start_pts_at_zero; } DdagrabContext; #define OFFSET(x) offsetof(DdagrabContext, x) @@ -123,6 +124,8 @@ static const AVOption ddagrab_options[] = { OFFSET(allow_fallback), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS }, { "force_fmt", "exclude BGRA from format list (experimental, discouraged by Microsoft)", OFFSET(force_fmt), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS }, + { "start_pts_at_zero", "start timestamps at PTS=0, removing any initial offset", + OFFSET(start_pts_at_zero), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS }, { NULL } }; @@ -913,7 +916,7 @@ static int ddagrab_request_frame(AVFilterLink *outlink) av_usleep(delay); } - if (!dda->first_pts) + if (dda->start_pts_at_zero && !dda->first_pts) dda->first_pts = now; now -= dda->first_pts; -- 2.40.0 _______________________________________________ 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".