More PR fixes

Author: shssoichiro

encoding/codecs/x264.md

@@ -9,14 +9,13 @@ compared to its predecessors.
 
 x264 is a mature, free, open-source encoder
 for the H.264 video format.
-This guide will focus on x264.
 
 
 ## Prerequisites
 
 To get started, you'll need two things:
 
-- A video to encode--for the examples,
+- A video to encode—for the examples,
   we will pipe in a video from VapourSynth,
   which you should be able to do
   if you've been following the previous sections of this guide
@@ -53,7 +52,7 @@ We'll walk through those concepts
 with the following examples.
 
 
-## Example 1: General-Purpose Encoding
+### Example 1: General-Purpose Encoding
 
 Open up a terminal window,
 and navigate to the folder
@@ -67,7 +66,7 @@ vspipe --y4m myvideo.vpy - | x264 --demuxer y4m --preset veryfast --tune animati
 Let's run through what each of these options means:
 
 
-#### `vspipe --y4m myvideo.vpy -`
+##### `vspipe --y4m myvideo.vpy -`
 
 This portion loads your VapourSynth script
 and pipes it to stdout,
@@ -81,14 +80,14 @@ the program that reads VapourSynth scripts,
 with `x264`, our encoder.
 
 
-#### `--demuxer y4m`
+##### `--demuxer y4m`
 
 This tells x264 that we're providing it with a y4m file.
 This matches up with the `--y4m` flag
 that we gave to the `vspipe` command.
 
 
-#### `--preset veryfast`
+##### `--preset veryfast`
 
 x264 has a set of presets
 to switch between faster encoding, or higher quality.
@@ -119,11 +118,14 @@ by running `x264 --fullhelp | less` (Linux/Mac)
 or `x264 --fullhelp | more` (Windows).
 However, this probably won't mean much at the moment.
 Don't worry,
-this guide will explain later
+this page will explain later
 what all of those settings mean.
 
+*Disclaimer:
+x264's `fullhelp` is not guaranteed to be up-to-date.*
 
-#### `--tune animation`
+
+##### `--tune animation`
 
 Beyond the preset chosen,
 x264 allows us to further tune the encoding settings
@@ -141,7 +143,7 @@ but it generally helps
 to produce a better-looking video.
 
 
-#### `--crf 24`
+##### `--crf 24`
 
 CRF is a constant-quality, 1-pass encoding mode.
 In layman's terms,
@@ -174,7 +176,7 @@ Here are some guidelines:
   unless you want your videos to look like they were made for dial-up.
 
 
-#### `-o x264output.mkv -`
+##### `-o x264output.mkv -`
 
 This last portion tells which files to use for the input and output.
 We use `-o` to tell which filename to write the encoded file to.
@@ -190,7 +192,7 @@ x264 will recognize it
 as the only argument without a `--` flag before it.
 
 
-## Example 2: Targeted File Size
+### Example 2: Targeted File Size
 
 For the next example,
 let's say we want to make sure our encode
@@ -239,7 +241,7 @@ but the average bitrate of the video
 will be close to what we requested.
 
 
-## Example 3: 2-Pass Encoding
+### Example 3: 2-Pass Encoding
 
 So far, we've only done 1-pass encodes.
 While using CRF 1-pass is great