Fix typo and grammar

RASPBIAN.md

@@ -110,7 +110,7 @@ e2fsck -f /dev/sda2
 resize2fs -M /dev/sda2
 #> The filesystem on /dev/sda2 is now 504923 (4k) blocks long.
 # Remember the block size (4k) and count (504923)
-# Now shrink the parition to 504923 * 4k = 2019692k
+# Now shrink the partition to 504923 * 4k = 2019692k
 # https://askubuntu.com/questions/780284/shrinking-ext4-partition-on-command-line
 fdisk /dev/sda
 # 1. Delete partition 2
@@ -119,7 +119,7 @@ d
 # - same START sector
 # - new END sector +2019692K (note '+' and uppercase 'K')
 n
-# 3. Check parition table
+# 3. Check partition table
 p
 # 3. Commit changes
 w

README.md

@@ -157,7 +157,7 @@ Once the command finishes, your camera can be added to HomeKit.
 ## Multistream
 
 Normally in HomeKit a camera stream can only be viewed by one device at a time.
-If a second device wants to to view the stream, the Apple Home app shows
+If a second device wants to view the stream, the Apple Home app shows
 
 > **Camera Not Available**
 > Wait until someone else in this home stops viewing this camera and try again.
@@ -189,7 +189,7 @@ The web interface shows the recent snapshot and lets you install updates.
 
 ## Raspberry Pi Zero W
 
-I do get kernel panics when running hkcam with a ELP 1080P USB camera.
+I do get kernel panics when running hkcam with an ELP 1080P USB camera.
 Updating `/boot/config.txt` with the following changes resolve those kernel panics.
 
 ```
@@ -203,19 +203,19 @@ arm_freq_min=700
 <img alt="Desk mount" src="_img/enclosure-desk.jpg?raw=true" width="320" />
 <img alt="Wall mount" src="_img/enclosure-wall.jpg?raw=true" width="320" />
 
-I've also designed an enclsoure for the Raspberry Pi Zero W and standard camera module.
+I've also designed an enclosure for the Raspberry Pi Zero W and standard camera module.
 You can use a stand to put the camera on a desk, or combine it with brackets of the [Articulating Raspberry Pi Camera Mount](https://www.prusaprinters.org/prints/3407-articulating-raspberry-pi-camera-mount-for-prusa-m) to mount it on a wall.
 The 3D-printed parts are available as STL files [here](https://github.com/brutella/hkcam/tree/master/enclosure).
 
-This enclosure is not waterproof and should not be used outside. Instead you should use an [ELP 1080P camera](https://de.aliexpress.com/item/4000562253329.html) and connect it via USB to a Raspberry Pi.
+This enclosure is not waterproof and should not be used outside. Instead, you should use an [ELP 1080P camera](https://de.aliexpress.com/item/4000562253329.html) and connect it via USB to a Raspberry Pi.
 
 <!-- #### Pre-configured Raspbian  Image
 
 You can use a pre-configured Raspbian Stretch Lite image, where everything is already configured.
 
 You only need to
 
-1. download the pre-configured Raspbian image and copy onto an sd card; [download](https://github.com/brutella/hkcam/releases/download/v0.0.9/raspbian-stretch-lite-2019-04-08-hkcam-v0.0.9-armv6.img.zip)
+1. download the pre-configured Raspbian image and copy onto a sd card; [download](https://github.com/brutella/hkcam/releases/download/v0.0.9/raspbian-stretch-lite-2019-04-08-hkcam-v0.0.9-armv6.img.zip)
 
 - **Note**: This image only works on a Raspberry Pi Zero
 
@@ -239,7 +239,7 @@ You only need to
 > sudo dd bs=1m if=~/Downloads/raspbian-stretch-lite-2019-04-08-hkcam-v0.0.9-armv6.img of=/dev/rdisk3 conv=sync
 > ```
 
-3. add your WiFi credentials so that the Raspberry Pi can connect to your WiFi
+3. add your Wi-Fi credentials so that the Raspberry Pi can connect to your Wi-Fi
 
 - create a new text file at `/Volumes/boot/wpa_supplicant.conf` with the following content
 ```sh
@@ -251,7 +251,7 @@ ssid="<ssid>"
 psk="<password>"
 }
 ```
-- replace `<ssid>` with the name of your WiFi, and `<password>` with the WiFi password.
+- replace `<ssid>` with the name of your Wi-Fi, and `<password>` with the Wi-Fi password.
 
 4. insert the sd card into your Raspberry Pi and power it up.
 (After a reboot it may take up to several minutes until the camera is accessible via HomeKit – see [issue #136](https://github.com/brutella/hap/issues/136).)
@@ -313,7 +313,7 @@ After the playbook finishes, the RPi is ready to be used as a HomeKit camera.
 **Additional Steps**
 
 - I recommend to change the password of the `pi` user, once you have configured your Raspberry Pi.
-- If you want to have multiple cameras on your network, you have to make sure that the hostnames are unqiue. By default the hostname of the Raspberry Pi is `raspberrypi.local`.
+- If you want to have multiple cameras on your network, you have to make sure that the hostnames are unique. By default, the hostname of the Raspberry Pi is `raspberrypi.local`.
 - SSH is enabled in the hkcam image. You may want to disable it.
 
 **Debugging**
@@ -331,7 +331,7 @@ You can use a stand to put the camera on a desk, or combine it with brackets of
 The 3D-printed parts are available as STL files [here](https://github.com/brutella/hkcam/tree/master/enclosure).
 
 # Advanced Configuration
-The application can be further configured using flags in the startup script. These can lead to a misconfigured system and shoud be used at your own caution.
+The application can be further configured using flags in the startup script. These can lead to a misconfigured system and should be used at your own caution.
 
 These settings can be changed in the startup script ```/etc/sv/hkcam/run```.
 
@@ -345,11 +345,11 @@ exec hkcam --data_dir=/var/lib/hkcam/data --verbose=true
 | Flag | Default value | Description |
 |--------- | -------------- | ----------------- |
 | min_video_bitrate | ```0``` | minimum video bit rate in kbps|
-| multi_stream | ```false``` | "Allow mutliple clients to view the stream simultaneously|
+| multi_stream | ```false``` | "Allow multiple clients to view the stream simultaneously|
 | data_dir | ```"Camera"``` | Path to data directory|
 | verbose | ```true```| Verbose logging|
 | pin | ```"00102003"``` | PIN for HomeKit pairing |
-| port | ```""``` | Port on which transport is reachable, random  portif empty |
+| port | ```""``` | Port on which transport is reachable, random port if empty |
 
 ## Network
 `hkcam` uses bonjour for service discovery. The port used for this ```5353```.

SNAPSHOTS.md

@@ -9,7 +9,7 @@ You can then access them via HomeKit.
 ## Why?
 
 Taking snapshots is an essential feature of any security camera.
-For example you want to take a snapshot once motion is detected in room.
+For example, you want to take a snapshot once motion is detected in room.
 But there are currently no IP cameras which support that via HomeKit.
 
 `hkcam` implements *Persistent Snapshots* with custom HomeKit characteristics.

ansible/roles/runit/README

@@ -13,5 +13,5 @@ Options
     exec 2>&1
     exec telegraf --config /etc/telegraf/telegraf.conf
 
-- finish_script (shell script) – The script which is excuted when the run script finishes.
+- finish_script (shell script) – The script which is executed when the run script finishes.
 - log_dir (string) – Path to the log directory, e.g. `/var/log/{service_name}`

api/json.go

@@ -6,7 +6,7 @@ import (
 )
 
 // WriteJSON responds to request r by encoding and sending v as json.
-// If v is an instance of of an ErrResponse, the response status code is 400 (Bad Request).
+// If v is an instance of an ErrResponse, the response status code is 400 (Bad Request).
 func WriteJSON(w http.ResponseWriter, r *http.Request, v interface{}) error {
 	switch v.(type) {
 	case *ErrResponse, ErrResponse:

camera_control.go

@@ -20,7 +20,7 @@ import (
 const TypeCameraControl = "19BDAD9E-6102-48D5-B413-3F11253706AE"
 
 // RefDate represents the reference date used to generate asset ids.
-// Short ids are prefered and therefore we use 1st April 2019 as the reference date.
+// Short ids are preferred and therefore we use 1st April 2019 as the reference date.
 var RefDate = time.Date(2019, 4, 1, 0, 0, 0, 0, time.UTC)
 
 type CameraControl struct {

cmd/hkcam/main.go

@@ -71,7 +71,7 @@ func main() {
 	}
 
 	var minVideoBitrate *int = flag.Int("min_video_bitrate", 0, "minimum video bit rate in kbps")
-	var multiStream *bool = flag.Bool("multi_stream", false, "Allow mutliple clients to view the stream simultaneously")
+	var multiStream *bool = flag.Bool("multi_stream", false, "Allow multiple clients to view the stream simultaneously")
 	var dataDir *string = flag.String("data_dir", "db", "Path to data directory")
 	var verbose *bool = flag.Bool("verbose", false, "Verbose logging")
 	var pin *string = flag.String("pin", "00102003", "PIN for HomeKit pairing")

ffmpeg/README.md

@@ -1,6 +1,6 @@
 # Debugging
 
-ffmpeg can be used to debug SRTP streaming by using ffmpeg and ffplay.
+ffmpeg can be used to debug RTSP streaming by using ffmpeg and ffplay.
 Install ffmpeg and ffplay via `brew install ffmpeg --with-ffplay`.
 
 ## RTSP Streaming
@@ -39,11 +39,11 @@ ffplay -i <path-to-sdp-file> -protocol_whitelist file,udp,rtp
 
 ## Bitrate
 
-FFMPEG cannot set the bitrate on Rasbperry Pi, we have to do it manually with `v4l2-ctl --set-ctrl video_bitrate=300000`.
+ffmpeg cannot set the bitrate on Raspberry Pi, we have to do it manually with `v4l2-ctl --set-ctrl video_bitrate=300000`.
 
 ## Streaming issues
 
 ffmpeg only sends one H264 keyframe at the beginning of a RTP stream on the RPi because of https://video.stackexchange.com/a/21245
 If we open the stream after it has been started using ffplay, we missed the keyframe and never get one – results in error: decode_slice_header error.
 
-Therefore we have to start ffplay before starting streaming.
+Therefore, we have to start ffplay before starting streaming.

ffmpeg/ffmpeg.go

@@ -107,7 +107,7 @@ func (f *ffmpeg) Stop(id StreamID) {
 	if f.loop != nil {
 		for _, s := range f.streams {
 			if s.isActive() {
-				log.Debug.Printf("Active sesssions %v\n", f.streams)
+				log.Debug.Printf("Active sessions %v\n", f.streams)
 				return
 			}
 		}
@@ -187,7 +187,7 @@ func (f *ffmpeg) Snapshot(width, height uint) (*Snapshot, error) {
 	if f.loop != nil {
 		for _, s := range f.streams {
 			if s.isActive() {
-				log.Debug.Printf("Active sesssions %v\n", f.streams)
+				log.Debug.Printf("Active sessions %v\n", f.streams)
 				return shot, err
 			}
 		}

ffmpeg/loopback.go

@@ -17,7 +17,7 @@ import (
 // This is needed to provide simultaneous access to a v4l2 device.
 // On a Raspberry Pi you can create a video loopback device at /dev/video1 via [v4l2loopback](https://github.com/umlaeute/v4l2loopback).
 // The data from /dev/video0 is then copied to /dev/video1 via `ffmpeg -f v4l2 -i /dev/video0 -codec:v copy -f v4l2 /dev/video1`.
-// The loopback device can then be access simultanously from multiple ffmpeg processes.
+// The loopback device can then be access simultaneously from multiple ffmpeg processes.
 type loopback struct {
 	inputDevice      string
 	inputFilename    string

ffmpeg/stream.go

@@ -253,7 +253,7 @@ func audioSamplingRate(param rtp.AudioParameters) string {
 	case rtp.AudioCodecSampleRate24Khz:
 		return "24k"
 	default:
-		log.Info.Println("audioSamplingRate() undefined samplrate", param.CodecParams.Samplerate)
+		log.Info.Println("audioSamplingRate() undefined samplerate", param.CodecParams.Samplerate)
 		break
 	}
 

html/update.go

@@ -8,15 +8,15 @@ import (
 	"net/http"
 )
 
-type UdpdatePage struct {
+type UpdatePage struct {
 	Page
 }
 
-// CheckForUpdate downloads the latest release and stores it as an db.Update in the database.
+// CheckForUpdate downloads the latest release and stores it as a db.Update in the database.
 // The user is then redirected to the previous page.
 // If no update was found, a message is shown to the user that no updates are available.
 func (h *Html) CheckForUpdate(w http.ResponseWriter, r *http.Request) {
-	p := UdpdatePage{}
+	p := UpdatePage{}
 	p.UpdateWithRequest(r, h)
 
 	selfupdate.EnableLog()
@@ -37,7 +37,7 @@ func (h *Html) CheckForUpdate(w http.ResponseWriter, r *http.Request) {
 
 // InstallLatestVersion installs the latest release no matter of the current build version
 func (h *Html) InstallLatestVersion(w http.ResponseWriter, r *http.Request) {
-	p := UdpdatePage{}
+	p := UpdatePage{}
 	p.UpdateWithRequest(r, h)
 
 	url := p.Referrer
@@ -61,9 +61,9 @@ func (h *Html) InstallLatestVersion(w http.ResponseWriter, r *http.Request) {
 }
 
 // InstallUpdate installs the latest release, if an update is already store din the database.
-// If no update is stored in the database or an install process currently running, this method does nothing.
+// If no update is stored in the database or an installation process currently running, this method does nothing.
 func (h *Html) InstallUpdate(w http.ResponseWriter, r *http.Request) {
-	p := UdpdatePage{}
+	p := UpdatePage{}
 	p.UpdateWithRequest(r, h)
 	if u := p.Update; u != nil {
 		switch u.State {

setup.go

@@ -56,9 +56,9 @@ func setupStreamManagement(m *service.CameraRTPStreamManagement, ff ffmpeg.FFMPE
 		case rtp.SessionControlCommandTypeStart:
 			ff.Start(id, cfg.Video, cfg.Audio)
 			if !multiStream {
-				// If only one video stream is suppported, set the status to busy.
+				// If only one video stream is supported, set the status to busy.
 				// This way HomeKit knows that nobody is allowed to connect anymore.
-				// If multiple streams are supported, the status is always availabe.
+				// If multiple streams are supported, the status is always available.
 				setTLV8Payload(m.StreamingStatus.Bytes, rtp.StreamingStatus{rtp.StreamingStatusBusy})
 			}
 		case rtp.SessionControlCommandTypeSuspend:

take_snapshot.go

@@ -8,7 +8,7 @@ const TypeTakeSnapshot = "E8AEE54F-6E4B-46D8-85B2-FECE188FDB08"
 
 // TakeSnapshot is used to take a snapshot.
 // After writing `true` to this characteristic,
-// a snapshot is taked and persisted on disk.
+// a snapshot is taken and persisted on disk.
 type TakeSnapshot struct {
 	*characteristic.Bool
 }