From 8cc99ef4ab1e3133ca8cf3e521a250be70e7d649 Mon Sep 17 00:00:00 2001
From: Andrei Bautu <abautu@gmail.com>
Date: Wed, 10 Mar 2021 12:58:59 +0200
Subject: [PATCH] Include comments about ffmpeg settings
---
.../core/lib/recordandplayback/generators/video.rb | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/record-and-playback/core/lib/recordandplayback/generators/video.rb b/record-and-playback/core/lib/recordandplayback/generators/video.rb
index 83b8a7381e..fdcf0ed049 100755
--- a/record-and-playback/core/lib/recordandplayback/generators/video.rb
+++ b/record-and-playback/core/lib/recordandplayback/generators/video.rb
@@ -55,7 +55,7 @@ module BigBlueButton
parameters: [
# These settings are appropriate for 640x480 medium quality, and should be tweaked for other resolutions
# See https://developers.google.com/media/vp9/settings/vod/
- # Increase -threads to max of 4 or increase -speed to max of 4 to speed up processing
+ # We use force_key_frames instead of -g to set the GOP size independent of the frame rate
%w[-c:v libvpx-vp9 -crf 32 -deadline realtime -cpu-used 8 -force_key_frames expr:gte(t,n_forced*10) -tile-columns 2 -tile-rows 2 -threads 4
-c:a copy
-f webm]
@@ -121,7 +121,7 @@ module BigBlueButton
parameters: [
# These settings are appropriate for 1280x720 medium quality, and should be tweaked for other resolutions
# See https://developers.google.com/media/vp9/settings/vod/
- # Increase -threads to max of 8 or increase -speed to max of 4 to speed up processing
+ # We use force_key_frames instead of -g to set the GOP size independent of the frame rate
%w[-c:v libvpx-vp9 -crf 32 -deadline realtime -cpu-used 8 -force_key_frames expr:gte(t,n_forced*10) -tile-columns 2 -tile-rows 2 -threads 4
-c:a copy
-f webm]
--
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