@@ -289,6 +289,11 @@ Sets the audio packet timestamp source. Must be @samp{video}, @samp{audio},

 If set to @samp{true}, color bars are drawn in the event of a signal loss.

 Defaults to @samp{true}.

+@item queue_size

+Sets maximum input buffer size in bytes. If the buffering reaches this value,

+incoming frames will be dropped.

+Defaults to @samp{1073741824}.

+

 @end table

 @subsection Examples

@@ -1,6 +1,7 @@

 /*

  * Blackmagic DeckLink common code

  * Copyright (c) 2013-2014 Ramiro Polla, Luca Barbato, Deti Fliegl

+ * Copyright (c) 2017 Akamai Technologies, Inc.

  *

  * This file is part of FFmpeg.

  *

@@ -38,6 +39,7 @@ typedef struct AVPacketQueue {

     pthread_mutex_t mutex;

     pthread_cond_t cond;

     AVFormatContext *avctx;

+    int64_t max_q_size;

 } AVPacketQueue;

 struct decklink_ctx {

@@ -1,6 +1,7 @@

 /*

  * Blackmagic DeckLink common code

  * Copyright (c) 2013-2014 Ramiro Polla

+ * Copyright (c) 2017 Akamai Technologies, Inc.

  *

  * This file is part of FFmpeg.

  *

@@ -48,6 +49,7 @@ struct decklink_cctx {

     int video_input;

     int draw_bars;

     char *format_code;

+    int64_t queue_size;

 };

 #endif /* AVDEVICE_DECKLINK_COMMON_C_H */

@@ -1,6 +1,7 @@

 /*

  * Blackmagic DeckLink input

  * Copyright (c) 2013-2014 Luca Barbato, Deti Fliegl

+ * Copyright (c) 2017 Akamai Technologies, Inc.

  *

  * This file is part of FFmpeg.

  *

@@ -187,10 +188,12 @@ static uint8_t* teletext_data_unit_from_vanc_data(uint8_t *src, uint8_t *tgt, in

 static void avpacket_queue_init(AVFormatContext *avctx, AVPacketQueue *q)

 {

+    struct decklink_cctx *ctx = (struct decklink_cctx *)avctx->priv_data;

     memset(q, 0, sizeof(AVPacketQueue));

     pthread_mutex_init(&q->mutex, NULL);

     pthread_cond_init(&q->cond, NULL);

     q->avctx = avctx;

+    q->max_q_size = ctx->queue_size;

 }

 static void avpacket_queue_flush(AVPacketQueue *q)

@@ -230,8 +233,8 @@ static int avpacket_queue_put(AVPacketQueue *q, AVPacket *pkt)

 {

     AVPacketList *pkt1;

-    // Drop Packet if queue size is > 1GB

-    if (avpacket_queue_size(q) >  1024 * 1024 * 1024 ) {

+    // Drop Packet if queue size is > maximum queue size

+    if (avpacket_queue_size(q) > q->max_q_size) {

         av_log(q->avctx, AV_LOG_WARNING,  "Decklink input buffer overrun!\n");

         return -1;

     }

@@ -1,6 +1,7 @@

 /*

  * Blackmagic DeckLink input

  * Copyright (c) 2014 Deti Fliegl

+ * Copyright (c) 2017 Akamai Technologies, Inc.

  *

  * This file is part of FFmpeg.

  *

@@ -64,6 +65,7 @@ static const AVOption options[] = {

     { "reference",     NULL,                                          0,  AV_OPT_TYPE_CONST, { .i64 = PTS_SRC_REFERENCE}, 0, 0, DEC, "pts_source"},

     { "wallclock",     NULL,                                          0,  AV_OPT_TYPE_CONST, { .i64 = PTS_SRC_WALLCLOCK}, 0, 0, DEC, "pts_source"},

     { "draw_bars",     "draw bars on signal loss" , OFFSET(draw_bars),    AV_OPT_TYPE_BOOL,  { .i64 = 1}, 0, 1, DEC },

+    { "queue_size",    "input queue buffer size",   OFFSET(queue_size),   AV_OPT_TYPE_INT64, { .i64 = (1024 * 1024 * 1024)}, 0, INT64_MAX, DEC },

     { NULL },

 };

@@ -29,7 +29,7 @@

 #define LIBAVDEVICE_VERSION_MAJOR  57

 #define LIBAVDEVICE_VERSION_MINOR   7

-#define LIBAVDEVICE_VERSION_MICRO 100

+#define LIBAVDEVICE_VERSION_MICRO 101

 #define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \

                                                LIBAVDEVICE_VERSION_MINOR, \