From 9742105d38ce4b42623394a6ab898312d310e686 Mon Sep 17 00:00:00 2001
From: Teddy Wing
Date: Tue, 20 Nov 2018 21:59:37 +0100
Subject: Make an MPEG-4 version of the demo video

Apparently, Safari doesn't support h.264-encoded video with a frame size
larger than 640x480. Learned about it from this Stack Overflow answer:
https://stackoverflow.com/questions/20347352/html5-video-tag-not-working-in-safari-iphone-and-ipad/31247386#31247386

According to Apple's documentation:

> The following compression standards are supported:
>
> * H.264 Baseline Profile Level 3.0 video, up to 640 x 480 at 30 fps.
>   Note that B frames are not supported in the Baseline profile.
> * MPEG-4 Part 2 video (Simple Profile)
> * AAC-LC audio, up to 48 kHz

(https://developer.apple.com/library/archive/documentation/AppleApplications/Reference/SafariWebContent/CreatingVideoforSafarioniPhone/CreatingVideoforSafarioniPhone.html#//apple_ref/doc/uid/TP40006514-SW9)

Seems a bit odd to me, but I don't know video, so sure, why not?

Since I want to keep my atypical video dimensions, encode it in MPEG-4
following this guide:
https://trac.ffmpeg.org/wiki/Encode/MPEG-4

Unfortunately, this gives us a 12 Mb video file (compared to the h.264's
~3 Mb). Reducing the quality just didn't produce a decent-looking
output.

Deciding to keep the h.264 version, just in case it's supported
somewhere, because it's the version with the smallest file size.
---
 scripts/video_export.sh | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/video_export.sh b/scripts/video_export.sh
index 7313c93..b345bd6 100644
--- a/scripts/video_export.sh
+++ b/scripts/video_export.sh
@@ -16,4 +16,11 @@ ffmpeg \
 	-acodec aac \
 	-strict \
 	-2 \
-	DomeKey-Screencast.mp4
+	DomeKey-Screencast.h264.mp4
+
+ffmpeg \
+	-i Screencast.mov \
+	-c:v mpeg4 \
+	-q:v 5 \
+	-acodec aac \
+	DomeKey-Screencast.mpeg4.mp4
-- 
cgit v1.2.3