[FFmpeg-devel] [PATCH] avdevice/decklink_enc: print preroll and buffer size

Gyan Doshi gyandoshi at gmail.com
Wed Aug 22 14:02:13 EEST 2018


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From f496d970d319ec3916a55e05b925f6b43763ebfa Mon Sep 17 00:00:00 2001
From: Gyan Doshi <ffmpeg at gyani.pro>
Date: Wed, 22 Aug 2018 16:23:58 +0530
Subject: [PATCH] avdevice/decklink_enc: print preroll and buffer size

Helpful in diagnosing latency issues.
---
 libavdevice/decklink_enc.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavdevice/decklink_enc.cpp b/libavdevice/decklink_enc.cpp
index 28ab928cd5..ee4c962add 100644
--- a/libavdevice/decklink_enc.cpp
+++ b/libavdevice/decklink_enc.cpp
@@ -193,6 +193,9 @@ static int decklink_setup_video(AVFormatContext *avctx, AVStream *st)
     pthread_cond_init(&ctx->cond, NULL);
     ctx->frames_buffer_available_spots = ctx->frames_buffer;
 
+    av_log(avctx, AV_LOG_DEBUG, "output: %s, preroll: %d, frames buffer size: %d\n",
+           avctx->url, ctx->frames_preroll, ctx->frames_buffer);
+
     /* The device expects the framerate to be fixed. */
     avpriv_set_pts_info(st, 64, st->time_base.num, st->time_base.den);
 
-- 
2.18.0


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