FFMPEG wrapper written in GO which allows to obtain the progress.
- Linux
- OS X
- Windows
go get github.com/mie00/goffmpeg
package main
import (
"github.com/mie00/goffmpeg/transcoder"
)
var inputPath = "/data/testmov"
var outputPath = "/data/testmp4.mp4"
func main() {
// Create new instance of transcoder
trans := new(transcoder.Transcoder)
// Initialize transcoder passing the input file path and output file path
err := trans.Initialize( inputPath, outputPath )
// Handle error...
// Start transcoder process without checking progress
done := trans.Run(false)
// This channel is used to wait for the process to end
err = <-done
// Handle error...
}
...
func main() {
// Create new instance of transcoder
trans := new(transcoder.Transcoder)
// Initialize transcoder passing the input file path and output file path
err := trans.Initialize( inputPath, outputPath )
// Handle error...
// Start transcoder process with progress checking
done := trans.Run(true)
// Returns a channel to get the transcoding progress
progress := trans.Output()
// Example of printing transcoding progress
for msg := range progress {
fmt.Println(msg)
}
// This channel is used to wait for the transcoding process to end
err = <-done
}
How to pipe in data using the pipe protocol
Creating an input pipe will return *io.PipeReader, and creating an output pipe will return *io.PipeWriter. An example is shown which uses cat
to pipe in data, and ioutil.ReadAll to read data as bytes from the pipe.
func main() {
// Create new instance of transcoder
trans := new(transcoder.Transcoder)
// Initialize an empty transcoder
err := trans.InitializeEmptyTranscoder()
// Handle error...
// Create a command such that its output should be passed as stdin to ffmpeg
cmd := exec.Command("cat", "/path/to/file")
// Create an input pipe to write to, which will return *io.PipeWriter
w, err := trans.CreateInputPipe()
cmd.Stdout = w
// Create an output pipe to read from, which will return *io.PipeReader.
// Must also specify the output container format
r, err := trans.CreateOutputPipe("mp4")
wg := &sync.WaitGroup{}
wg.Add(1)
go func() {
defer r.Close()
defer wg.Done()
// Read data from output pipe
data, err := ioutil.ReadAll(r)
// Handle error and data...
}()
go func() {
defer w.Close()
err := cmd.Run()
// Handle error...
}()
// Start transcoder process without checking progress
done := trans.Run(false)
// This channel is used to wait for the transcoding process to end
err = <-done
// Handle error...
wg.Wait()
}
type Progress struct {
FramesProcessed string
CurrentTime string
CurrentBitrate string
Progress float64
Speed string
}
Those options can be set before starting the transcoding.
SetAspect
SetResolution
SetVideoBitRate
SetVideoBitRateTolerance
SetVideoMaxBitrate
SetVideoMinBitRate
SetVideoCodec
SetVframes
SetFrameRate
SetAudioRate
SetSkipAudio
SetSkipVideo
SetMaxKeyFrame
SetMinKeyFrame
SetKeyframeInterval
SetAudioCodec
SetAudioBitRate
SetAudioChannels
SetBufferSize
SetThreads
SetPreset
SetTune
SetAudioProfile
SetVideoProfile
SetDuration
SetDurationInput
SetSeekTime
SetSeekTimeInput
SetSeekUsingTsInput
SetQuality
SetStrict
SetCopyTs
SetMuxDelay
SetHideBanner
SetInputPath
SetNativeFramerateInput
SetRtmpLive
SetHlsListSize
SetHlsSegmentDuration
SetHlsPlaylistType
SetHlsMasterPlaylistName
SetHlsSegmentFilename
SetHttpMethod
SetHttpKeepAlive
SetOutputPath
SetOutputFormat
SetAudioFilter
SetAudioVariableBitrate
SetCompressionLevel
SetFilter
SetInputInitialOffset
SetInputPipeCommand
SetMapMetadata
SetMetadata
SetStreamIds
SetTags
SetVideoFilter
Example
func main() {
// Create new instance of transcoder
trans := new(transcoder.Transcoder)
// Initialize transcoder passing the input file path and output file path
err := trans.Initialize( inputPath, outputPath )
// Handle error...
// SET FRAME RATE TO MEDIAFILE
trans.MediaFile().SetFrameRate(70)
// SET ULTRAFAST PRESET TO MEDIAFILE
trans.MediaFile().SetPreset("ultrafast")
// Start transcoder process to check progress
done := trans.Run(true)
// Returns a channel to get the transcoding progress
progress := trans.Output()
// Example of printing transcoding progress
for msg := range progress {
fmt.Println(msg)
}
// This channel is used to wait for the transcoding process to end
err = <-done
}
Example with AES encryption :
More information about HLS encryption with FFMPEG
# Generate key
openssl rand 16 > enc.key
Create key file info :
Key URI
Path to key file
func main() {
trans := new(transcoder.Transcoder)
err := trans.Initialize(inputPath, outputPath)
trans.MediaFile().SetVideoCodec("libx264")
trans.MediaFile().SetHlsSegmentDuration(4)
trans.MediaFile().SetEncryptionKey(keyinfoPath)
progress := trans.Output()
err = <-done
}
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> Building...