ffmpeg-force-input-threading.patch

From e4fe70eb4beb0cef616da790df00e47a94c7f1a7 Mon Sep 17 00:00:00 2001
From: Patrick Keroulas <patrick.keroulas@gmail.com>
Date: Fri, 16 Nov 2018 16:57:38 -0500
Subject: ffmpeg: force input threading

---
 fftools/ffmpeg.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
index e7384f052a..a00709979d 100644
--- a/fftools/ffmpeg.c
+++ b/fftools/ffmpeg.c
@@ -23,6 +23,8 @@
  * multimedia converter based on the FFmpeg libraries
  */
 
+#define _GNU_SOURCE // needed for thread_setname_np
+
 #include "config.h"
 #include <ctype.h>
 #include <string.h>
@@ -3717,8 +3719,9 @@ static int init_input_thread(int i)
     int ret;
     InputFile *f = input_files[i];
 
+    /* we want to force a seperate input thread even with only one input */
     if (f->thread_queue_size < 0)
-        f->thread_queue_size = (nb_input_files > 1 ? 8 : 0);
+        f->thread_queue_size = 8; //(nb_input_files > 1 ? 8 : 0);
     if (!f->thread_queue_size)
         return 0;
 
@@ -3735,6 +3738,7 @@ static int init_input_thread(int i)
         av_thread_message_queue_free(&f->in_thread_queue);
         return AVERROR(ret);
     }
+    pthread_setname_np(f->thread, "ffmpeg-input");
 
     return 0;
 }
@@ -3781,7 +3785,8 @@ static int get_input_packet(InputFile *f, AVPacket **pkt)
     }
 
 #if HAVE_THREADS
-    if (f->thread_queue_size)
+    /* we use a seperate input thread even with only one input */
+    // if (f->thread_queue_size)
         return get_input_packet_mt(f, pkt);
 #endif
     *pkt = f->pkt;
-- 
2.25.1