From b7ab6e18eecad43593ad2a0e9fc9eba7f24751cb Mon Sep 17 00:00:00 2001
From: wm4 <nfxjfg@googlemail.com>
Date: Tue, 8 Sep 2015 19:42:24 +0200
Subject: [PATCH] mmaldec: disable timestamp interpolation

This MMAL feature fills in missing timestamps from the framerate set on
the input port. This is generally unwanted, since libavcodec decoders
merely pass through timestamps without ever "fixing" them. The framerate
is also unknown, and even the timebase doesn't have to be set.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
---
 libavcodec/mmaldec.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavcodec/mmaldec.c b/libavcodec/mmaldec.c
index 5692f505c0..f4bf9214fe 100644
--- a/libavcodec/mmaldec.c
+++ b/libavcodec/mmaldec.c
@@ -26,6 +26,7 @@
 
 #include <bcm_host.h>
 #include <interface/mmal/mmal.h>
+#include <interface/mmal/mmal_parameters_video.h>
 #include <interface/mmal/util/mmal_util.h>
 #include <interface/mmal/util/mmal_util_params.h>
 #include <interface/mmal/util/mmal_default_components.h>
@@ -277,6 +278,9 @@ static int ffmal_update_format(AVCodecContext *avctx)
     if ((status = mmal_port_parameter_set_uint32(decoder->output[0], MMAL_PARAMETER_EXTRA_BUFFERS, ctx->extra_buffers)))
         goto fail;
 
+    if ((status = mmal_port_parameter_set_boolean(decoder->output[0], MMAL_PARAMETER_VIDEO_INTERPOLATE_TIMESTAMPS, 0)))
+        goto fail;
+
     if (avctx->pix_fmt == AV_PIX_FMT_MMAL) {
         format_out->encoding = MMAL_ENCODING_OPAQUE;
     } else {