ring: add review jami helper.

helpers/DATA/ring/ffmpeg_time_base_frame.patch

@@ -0,0 +1,27 @@
+From b7dd425660c420466d951f09e3c67e9d5f9eec90 Mon Sep 17 00:00:00 2001
+From: Aline Gondim Santos <aline.gondimsantos@savoirfairelinux.com>
+Date: Wed, 5 Oct 2022 10:19:27 -0300
+Subject: [PATCH] misc: set frame time_base when decoding
+
+To properly get the time_base and framerate in the plugins,
+we need to set the frame properties when decoding.
+
+GitLab: https://git.jami.net/savoirfairelinux/jami-plugins/-/issues/23
+
+Change-Id: I69a2235c46b13a15414c4d01821cc1eba5b73987
+---
+ src/media/media_decoder.cpp | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/daemon/src/media/media_decoder.cpp b/daemon/src/media/media_decoder.cpp
+index 7cba58abe63..cd1698a5048 100644
+--- a/daemon/src/media/media_decoder.cpp
++++ b/daemon/src/media/media_decoder.cpp
+@@ -644,6 +644,7 @@ MediaDecoder::decode(AVPacket& packet)
+ #endif
+     auto frame = f->pointer();
+     ret = avcodec_receive_frame(decoderCtx_, frame);
++    frame->time_base = decoderCtx_->time_base;
+     if (resolutionChangedCallback_) {
+         if (decoderCtx_->width != width_ or decoderCtx_->height != height_) {
+             JAMI_DBG("Resolution changed from %dx%d to %dx%d",