support input options (#32)

Author: r6c

README.md

@@ -50,10 +50,19 @@ import (
 
 func main() {
 
+
+	hwaccel := "cuvid"
+	videoCodec := "h264_cuvid"
+
+	inputOpts := ffmpeg.Options{
+		Hwaccel:      &hwaccel,
+		VideoCodec:   &videoCodec,
+	}
+	
 	format := "mp4"
 	overwrite := true
 
-	opts := ffmpeg.Options{
+	outputOpts := ffmpeg.Options{
 		OutputFormat: &format,
 		Overwrite:    &overwrite,
 	}
@@ -68,8 +77,9 @@ func main() {
 		New(ffmpegConf).
 		Input("/tmp/avi").
 		Output("/tmp/mp4").
-		WithOptions(opts).
-		Start(opts)
+		WithInputOptions(inputOpts).
+		WithOutputOptions(outputOpts).
+		Start()
 
 	if err != nil {
 		log.Fatal(err)

ffmpeg/ffmpeg.go

@@ -23,7 +23,8 @@ type Transcoder struct {
 	config           *Config
 	input            string
 	output           []string
-	options          [][]string
+	inputOptions     []string
+	outputOptions    [][]string
 	metadata         transcoder.Metadata
 	inputPipeReader  *io.ReadCloser
 	outputPipeReader *io.ReadCloser
@@ -38,7 +39,7 @@ func New(cfg *Config) transcoder.Transcoder {
 }
 
 // Start ...
-func (t *Transcoder) Start(opts transcoder.Options) (<-chan transcoder.Progress, error) {
+func (t *Transcoder) Start() (<-chan transcoder.Progress, error) {
 
 	var stderrIn io.ReadCloser
 
@@ -58,24 +59,30 @@ func (t *Transcoder) Start(opts transcoder.Options) (<-chan transcoder.Progress,
 	}
 
 	// Append input file and standard options
-	args := append([]string{"-i", t.input}, opts.GetStrArguments()...)
+	var args []string
+
+	if len(t.inputOptions) > 0 {
+		args = append(args, t.inputOptions...)
+	}
+
+	args = append(args, []string{"-i", t.input}...)
 	outputLength := len(t.output)
-	optionsLength := len(t.options)
+	outputOptionsLength := len(t.outputOptions)
 
-	if outputLength == 1 && optionsLength == 0 {
+	if outputLength == 1 && outputOptionsLength == 0 {
 		// Just append the 1 output file we've got
 		args = append(args, t.output[0])
 	} else {
 		for index, out := range t.output {
 			// Get executable flags
 			// If we are at the last output file but still have several options, append them all at once
-			if index == outputLength-1 && outputLength < optionsLength {
-				for i := index; i < len(t.options); i++ {
-					args = append(args, t.options[i]...)
+			if index == outputLength-1 && outputLength < outputOptionsLength {
+				for i := index; i < len(t.outputOptions); i++ {
+					args = append(args, t.outputOptions[i]...)
 				}
 				// Otherwise just append the current options
 			} else {
-				args = append(args, t.options[index]...)
+				args = append(args, t.outputOptions[index]...)
 			}
 
 			// Append output flag
@@ -158,15 +165,27 @@ func (t *Transcoder) OutputPipe(w *io.WriteCloser, r *io.ReadCloser) transcoder.
 	return t
 }
 
-// WithOptions Sets the options object
-func (t *Transcoder) WithOptions(opts transcoder.Options) transcoder.Transcoder {
-	t.options = [][]string{opts.GetStrArguments()}
+// WithInputOptions Sets the options object
+func (t *Transcoder) WithInputOptions(opts transcoder.Options) transcoder.Transcoder {
+	t.inputOptions = opts.GetStrArguments()
+	return t
+}
+
+// WithAdditionalInputOptions Appends an additional options object
+func (t *Transcoder) WithAdditionalInputOptions(opts transcoder.Options) transcoder.Transcoder {
+	t.inputOptions = append(t.inputOptions, opts.GetStrArguments()...)
+	return t
+}
+
+// WithOutputOptions Sets the options object
+func (t *Transcoder) WithOutputOptions(opts transcoder.Options) transcoder.Transcoder {
+	t.outputOptions = [][]string{opts.GetStrArguments()}
 	return t
 }
 
-// WithAdditionalOptions Appends an additional options object
-func (t *Transcoder) WithAdditionalOptions(opts transcoder.Options) transcoder.Transcoder {
-	t.options = append(t.options, opts.GetStrArguments())
+// WithAdditionalOutputOptions Appends an additional options object
+func (t *Transcoder) WithAdditionalOutputOptions(opts transcoder.Options) transcoder.Transcoder {
+	t.outputOptions = append(t.outputOptions, opts.GetStrArguments())
 	return t
 }
 
@@ -196,7 +215,7 @@ func (t *Transcoder) validate() error {
 
 	// length of output files being greater than length of options would produce an invalid ffmpeg command
 	// unless there is only 1 output file, which obviously wouldn't be a problem
-	if outputLength > len(t.options) && outputLength != 1 {
+	if outputLength > len(t.outputOptions) && outputLength != 1 {
 		return errors.New("number of options and output files does not match")
 	}
 

transcoder.go

@@ -7,13 +7,15 @@ import (
 
 // Transcoder ...
 type Transcoder interface {
-	Start(opts Options) (<-chan Progress, error)
+	Start() (<-chan Progress, error)
 	Input(i string) Transcoder
 	InputPipe(w *io.WriteCloser, r *io.ReadCloser) Transcoder
 	Output(o string) Transcoder
 	OutputPipe(w *io.WriteCloser, r *io.ReadCloser) Transcoder
-	WithOptions(opts Options) Transcoder
-	WithAdditionalOptions(opts Options) Transcoder
+	WithInputOptions(opts Options) Transcoder
+	WithAdditionalInputOptions(opts Options) Transcoder
+	WithOutputOptions(opts Options) Transcoder
+	WithAdditionalOutputOptions(opts Options) Transcoder
 	WithContext(ctx *context.Context) Transcoder
 	GetMetadata() (Metadata, error)
 }