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transcode.go
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transcode.go
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package liv
import (
"context"
"fmt"
"os"
"strings"
"github.com/fxkt-tech/liv/ffmpeg"
"github.com/fxkt-tech/liv/ffmpeg/codec"
"github.com/fxkt-tech/liv/ffmpeg/filter"
"github.com/fxkt-tech/liv/ffmpeg/filter/fsugar"
"github.com/fxkt-tech/liv/ffmpeg/input"
"github.com/fxkt-tech/liv/ffmpeg/output"
"github.com/fxkt-tech/liv/ffmpeg/stream"
"github.com/fxkt-tech/liv/ffmpeg/util"
"github.com/fxkt-tech/liv/internal/sugar"
)
type Transcode struct {
*options
spec *TranscodeSpec
}
func NewTranscode(opts ...Option) *Transcode {
o := &options{}
for _, opt := range opts {
opt(o)
}
tc := &Transcode{
spec: NewTranscodeSpec(),
options: o,
}
return tc
}
func (tc *Transcode) SimpleMP4(ctx context.Context, params *TranscodeParams) error {
err := tc.spec.SimpleMP4Satified(params)
if err != nil {
return err
}
var (
inputs input.Inputs
filters filter.Filters
outputs output.Outputs
sublen = len(params.Subs)
logoStartIndex = 1
)
// 处理input
inputs = append(inputs, input.WithSimple(params.Infile))
// 处理filter和output
//
// 将源文件分为多个副本,用于生成多个output
fsplit := filter.Split(sublen)
filters = append(filters, fsplit)
for i, sub := range params.Subs {
outputOpts := []output.Option{}
// 处理filter
lastFilter := fsplit.S(i)
// 处理遮标
if delogos := sub.Filters.Delogo; len(delogos) > 0 {
for _, delogo := range delogos {
fdelogo := filter.Delogo(
int32(delogo.Rect.X), int32(delogo.Rect.Y),
int32(delogo.Rect.W), int32(delogo.Rect.H),
).Use(lastFilter)
filters = append(filters, fdelogo)
lastFilter = fdelogo
}
}
// 视频缩放
if sub.Filters.Video != nil {
scale := filter.Scale(
util.FixPixelLen(sub.Filters.Video.Width),
util.FixPixelLen(sub.Filters.Video.Height),
).Use(lastFilter)
filters = append(filters, scale)
lastFilter = scale
if sub.Filters.Video.Crf > 0 {
outputOpts = append(outputOpts, output.Crf(sub.Filters.Video.Crf))
}
}
// 添加水印
if logos := sub.Filters.Logo; len(logos) > 0 {
for _, logo := range logos {
var finalLogoStream stream.Streamer
logoStream := stream.V(logoStartIndex + i)
if logo.NeedScale() {
logoScale := filter.Scale(
util.FixPixelLen(int32(logo.LW)),
util.FixPixelLen(int32(logo.LH)),
).Use(logoStream)
filters = append(filters, logoScale)
finalLogoStream = logoScale
} else {
finalLogoStream = logoStream
}
flogo := filter.Overlay(fsugar.LogoPos(int32(logo.Dx), int32(logo.Dy), logo.Pos)).
Use(lastFilter, finalLogoStream)
filters = append(filters, flogo)
inputs = append(inputs, input.WithSimple(logo.File))
lastFilter = flogo
}
}
// 处理output
outputOpts = append(outputOpts,
output.Map(lastFilter),
output.Map(stream.Select(0, stream.MayAudio)),
output.VideoCodec(sub.Filters.Video.Codec),
output.AudioCodec(sub.Filters.Audio.Codec),
output.MovFlags("faststart"),
output.Thread(sub.Threads),
output.MaxMuxingQueueSize(4086),
output.File(sub.Outfile),
)
outputOpts = append(outputOpts, metadataOptionFromKV(sub.Filters.Metadata)...)
// 处理在每一路输出流的裁剪
if sub.Filters.Clip != nil {
outputOpts = append(outputOpts,
output.StartTime(sub.Filters.Clip.Seek),
output.Duration(sub.Filters.Clip.Duration),
)
}
outputs = append(outputs, output.New(outputOpts...))
}
return ffmpeg.New(tc.ffmpegOpts...).
AddInput(inputs...).
AddFilter(filters...).
AddOutput(outputs...).
Run(ctx)
}
func metadataOptionFromKV(kvs []*KV) []output.Option {
oos := make([]output.Option, len(kvs))
for i, kv := range kvs {
oos[i] = output.Metadata(kv.K, kv.V)
}
return oos
}
func (tc *Transcode) SimpleMP3(ctx context.Context, params *TranscodeParams) error {
err := tc.spec.SimpleMP3Satified(params)
if err != nil {
return err
}
var (
inputs input.Inputs
filters filter.Filters
outputs output.Outputs
sublen = len(params.Subs)
)
// 处理input
inputs = append(inputs, input.WithSimple(params.Infile))
// 处理filter和output
//
// 将源文件分为多个副本,用于生成多个output
fsplit := filter.ASplit(sublen).Use(stream.V(0))
filters = append(filters, fsplit)
for i, sub := range params.Subs {
// 处理filter
lastFilter := fsplit.S(i)
// 处理output
outputOpts := []output.Option{
output.Map(lastFilter),
output.AudioCodec(sub.Filters.Audio.Codec),
output.AudioBitrate(sub.Filters.Audio.Bitrate),
output.Thread(sub.Threads),
output.MaxMuxingQueueSize(4086),
output.File(sub.Outfile),
}
outputs = append(outputs, output.New(outputOpts...))
}
return ffmpeg.New(tc.ffmpegOpts...).
AddInput(inputs...).
AddFilter(filters...).
AddOutput(outputs...).
Run(ctx)
}
func (tc *Transcode) SimpleJPEG(ctx context.Context, params *TranscodeParams) error {
err := tc.spec.SimpleJPEGSatified(params)
if err != nil {
return err
}
var (
inputs input.Inputs
filters filter.Filters
outputs output.Outputs
sublen = len(params.Subs)
)
// 处理input
inputs = append(inputs, input.WithSimple(params.Infile))
// 处理filter和output
//
// 将源文件分为多个副本,用于生成多个output
fsplit := filter.Split(sublen)
filters = append(filters, fsplit)
for i, sub := range params.Subs {
// 处理filter
lastFilter := fsplit.S(i)
// 处理遮标
if delogos := sub.Filters.Delogo; len(delogos) > 0 {
for _, delogo := range delogos {
fdelogo := filter.Delogo(int32(delogo.Rect.X), int32(delogo.Rect.Y), int32(delogo.Rect.W), int32(delogo.Rect.H)).Use(lastFilter)
filters = append(filters, fdelogo)
lastFilter = fdelogo
}
}
// 视频缩放
if sub.Filters.Video != nil {
scale := filter.Scale(sub.Filters.Video.Width, sub.Filters.Video.Height).Use(lastFilter)
filters = append(filters, scale)
lastFilter = scale
}
// 添加水印
if logos := sub.Filters.Logo; len(logos) > 0 {
for _, logo := range logos {
flogo := filter.Overlay(fsugar.LogoPos(int32(logo.Dx), int32(logo.Dy), logo.Pos)).Use(lastFilter)
filters = append(filters, flogo)
inputs = append(inputs, input.WithSimple(logo.File))
lastFilter = flogo
}
}
// 处理output
outputOpts := []output.Option{
output.Map(lastFilter),
output.VideoCodec(sub.Filters.Video.Codec),
output.Thread(sub.Threads),
output.MaxMuxingQueueSize(4086),
output.File(sub.Outfile),
}
outputs = append(outputs, output.New(outputOpts...))
}
return ffmpeg.New(tc.ffmpegOpts...).
AddInput(inputs...).
AddFilter(filters...).
AddOutput(outputs...).
Run(ctx)
}
func (tc *Transcode) ConvertContainer(ctx context.Context, params *ConvertContainerParams) error {
err := tc.spec.ConvertContainerSatified(params)
if err != nil {
return err
}
var (
inputs input.Inputs
outputs output.Outputs
)
// 处理input
inputs = append(inputs, input.WithSimple(params.InFile))
// 处理output
outputOpts := []output.Option{
output.VideoCodec(codec.Copy),
output.AudioCodec(codec.Copy),
output.MovFlags("faststart"),
output.Thread(params.Threads),
output.MaxMuxingQueueSize(4086),
output.File(params.OutFile),
}
outputOpts = append(outputOpts, metadataOptionFromKV(params.Metadata)...)
outputs = append(outputs, output.New(outputOpts...))
return ffmpeg.New(tc.ffmpegOpts...).
AddInput(inputs...).
AddOutput(outputs...).
Run(ctx)
}
// 转hls
func (tc *Transcode) SimpleHLS(ctx context.Context, params *TranscodeSimpleHLSParams) error {
err := tc.spec.SimpleHLSSatified(params)
if err != nil {
return err
}
var (
inputs input.Inputs
filters filter.Filters
outputs = make(output.Outputs, 1)
logoStartIndex = 1 // logo输入文件的起始索引
)
// 处理input
if params.Filters.Clip != nil {
inputs = append(inputs,
input.WithTime(params.Filters.Clip.Seek, params.Filters.Clip.Duration, params.Infile))
} else {
inputs = append(inputs, input.WithSimple(params.Infile))
}
// 处理filter和output
//
var lastFilter filter.Filter
if params.Filters != nil {
// 处理filter
// 处理遮标
if delogos := params.Filters.Delogo; len(delogos) > 0 {
for _, delogo := range delogos {
fdelogo := filter.Delogo(
int32(delogo.Rect.X), int32(delogo.Rect.Y), int32(delogo.Rect.W), int32(delogo.Rect.H)).
Use(lastFilter)
filters = append(filters, fdelogo)
lastFilter = fdelogo
}
}
// 视频缩放
if params.Filters.Video != nil {
scale := filter.Scale(
util.FixPixelLen(params.Filters.Video.Width), util.FixPixelLen(params.Filters.Video.Height)).
Use(lastFilter)
filters = append(filters, scale)
lastFilter = scale
}
// 添加水印
if logos := params.Filters.Logo; len(logos) > 0 {
for i, logo := range logos {
var finalLogoStream stream.Streamer
logoStream := stream.V(logoStartIndex + i)
if logo.NeedScale() {
logoScale := filter.Scale(
util.FixPixelLen(int32(logo.LW)), util.FixPixelLen(int32(logo.LH))).Use(logoStream)
filters = append(filters, logoScale)
finalLogoStream = logoScale
} else {
finalLogoStream = logoStream
}
flogo := filter.Overlay(fsugar.LogoPos(int32(logo.Dx), int32(logo.Dy), logo.Pos)).
Use(lastFilter, finalLogoStream)
filters = append(filters, flogo)
inputs = append(inputs, input.WithSimple(logo.File))
lastFilter = flogo
}
}
} else {
// 为使用map必须放一个filter
scale := filter.Scale(util.FixPixelLen(0), util.FixPixelLen(0)).Use(lastFilter)
filters = append(filters, scale)
lastFilter = scale
}
// 处理output
outputs[0] = output.New(
output.Map(lastFilter),
output.Map(stream.Select(0, stream.MayAudio)),
output.Crf(params.Filters.Video.Crf),
output.VideoCodec(params.Filters.Video.Codec),
output.AudioCodec(params.Filters.Audio.Codec),
output.KV("sc_threshold", "0"),
output.File(params.Outfile),
output.MovFlags("faststart"),
output.GOP(params.Filters.Video.GOP),
output.HLSSegmentType("mpegts"),
output.HLSFlags("independent_segments"),
output.HLSPlaylistType("vod"),
output.HLSTime(params.Filters.HLS.HLSTime),
output.HLSSegmentFilename(params.Filters.HLS.HLSSegmentFilename),
output.Format(codec.HLS),
)
return ffmpeg.New(tc.ffmpegOpts...).
AddInput(inputs...).
AddFilter(filters...).
AddOutput(outputs...).
Run(ctx)
}
// 转ts
func (tc *Transcode) SimpleTS(ctx context.Context, params *TranscodeSimpleTSParams) error {
err := tc.spec.SimpleTSSatified(params)
if err != nil {
return err
}
var (
inputs input.Inputs
filters filter.Filters
outputs = make(output.Outputs, 1)
logoStartIndex = 1
)
// 处理input
if params.Filters.Clip != nil {
inputs = append(inputs, input.WithTime(params.Filters.Clip.Seek, params.Filters.Clip.Duration, params.Infile))
} else {
inputs = append(inputs, input.WithSimple(params.Infile))
}
// 处理filter和output
//
var lastFilter, lastAudioFilter filter.Filter
if params.Filters != nil {
// 处理filter
fmt.Println("处理filter")
// 处理遮标
if delogos := params.Filters.Delogo; len(delogos) > 0 {
for _, delogo := range delogos {
fdelogo := filter.Delogo(
int32(delogo.Rect.X), int32(delogo.Rect.Y), int32(delogo.Rect.W), int32(delogo.Rect.H)).
Use(lastFilter)
filters = append(filters, fdelogo)
lastFilter = fdelogo
}
}
// 视频缩放
if params.Filters.Video != nil {
scale := filter.Scale(
util.FixPixelLen(params.Filters.Video.Width), util.FixPixelLen(params.Filters.Video.Height)).
Use(lastFilter)
filters = append(filters, scale)
lastFilter = scale
}
// 添加水印
if logos := params.Filters.Logo; len(logos) > 0 {
for i, logo := range logos {
var finalLogoStream stream.Streamer
logoStream := stream.V(logoStartIndex + i)
if logo.NeedScale() {
logoScale := filter.Scale(
util.FixPixelLen(int32(logo.LW)), util.FixPixelLen(int32(logo.LH))).Use(logoStream)
filters = append(filters, logoScale)
finalLogoStream = logoScale
} else {
finalLogoStream = logoStream
}
flogo := filter.Overlay(fsugar.LogoPos(int32(logo.Dx), int32(logo.Dy), logo.Pos)).
Use(lastFilter, finalLogoStream)
filters = append(filters, flogo)
inputs = append(inputs, input.WithSimple(logo.File))
lastFilter = flogo
}
}
// 设置视频PTS
if pts := params.Filters.Video.PTS; pts != "" {
fsetpts := filter.SetPTS(pts).Use(lastFilter)
filters = append(filters, fsetpts)
lastFilter = fsetpts
}
// 设置音频PTS
if apts := params.Filters.Video.APTS; apts != "" {
aStream := stream.A(0)
fasetpts := filter.ASetPTS(apts).Use(aStream)
filters = append(filters, fasetpts)
lastAudioFilter = fasetpts
}
} else {
// 为使用map必须放一个filter
scale := filter.Scale(util.FixPixelLen(0), util.FixPixelLen(0)).Use(lastFilter)
filters = append(filters, scale)
lastFilter = scale
}
// 处理output
outputs[0] = output.New(
output.Map(lastFilter),
output.Map(lastAudioFilter),
output.VideoCodec(params.Filters.Video.Codec),
output.AudioCodec(params.Filters.Audio.Codec),
output.Crf(params.Filters.Video.Crf),
output.KV("sc_threshold", "0"),
output.GOP(params.Filters.Video.GOP),
output.MovFlags("faststart"),
output.Thread(params.Threads),
output.MaxMuxingQueueSize(4086),
output.File(params.Outfile),
)
return ffmpeg.New(tc.ffmpegOpts...).
AddInput(inputs...).
AddFilter(filters...).
AddOutput(outputs...).
Run(ctx)
}
func ConcatFile(files []string, localPath string) error {
f, err := os.Create(localPath)
if err != nil {
return err
}
files = sugar.Multi(files, func(f string) string { return fmt.Sprintf("file '%s'", f) })
fs := strings.Join(files, "\n")
_, err = f.Write([]byte(fs))
return err
}
// 多个视频合并成一个
func (tc *Transcode) Concat(ctx context.Context, params *ConcatParams) error {
err := tc.spec.ConcatSatified(params)
if err != nil {
return err
}
err = ConcatFile(params.Infiles, params.ConcatFile)
if err != nil {
return err
}
return ffmpeg.New(
ffmpeg.WithDebug(true),
).AddInput(
input.WithConcat(params.ConcatFile),
).AddOutput(
output.New(
output.VideoCodec(codec.Copy),
output.AudioCodec(codec.Copy),
output.Duration(params.Duration),
output.File(params.Outfile),
),
).Run(ctx)
}
// ffmpeg -i in.mp4 -vn -c:a copy out.aac
func (tc *Transcode) ExtractAudio(ctx context.Context, params *ExtractAudioParams) error {
err := tc.spec.ExtractAudioSatified(params)
if err != nil {
return err
}
var (
inputs input.Inputs
outputs output.Outputs
)
// 处理input
inputs = append(inputs, input.WithSimple(params.Infile))
// 处理output
outputOpts := []output.Option{
output.AudioCodec(codec.Copy),
output.VideoCodec(codec.Nope),
output.File(params.Outfile),
}
outputs = append(outputs, output.New(outputOpts...))
return ffmpeg.New(tc.ffmpegOpts...).
AddInput(inputs...).
AddOutput(outputs...).
Run(ctx)
}
// ffmpeg -i in.mp4 -vn -c:a copy out.aac
func (tc *Transcode) MergeByFrames(ctx context.Context, params *MergeParams) error {
err := tc.spec.MergeByFramesSatified(params)
if err != nil {
return err
}
var (
inputs input.Inputs
outputs output.Outputs
)
// 处理input
inputs = append(inputs,
input.New(input.FPS(params.Filters.Video.FPS), input.I(params.FramesInfile)),
input.WithSimple(params.AudioInfile),
)
// 处理output
outputOpts := []output.Option{
output.AudioCodec(codec.Copy),
output.VideoCodec(params.Filters.Video.Codec),
output.AudioCodec(params.Filters.Audio.Codec),
output.PixFmt(params.Filters.Video.PixFmt),
output.Crf(params.Filters.Video.Crf),
output.MovFlags("faststart"),
output.MaxMuxingQueueSize(4086),
output.File(params.Outfile),
}
outputs = append(outputs, output.New(outputOpts...))
return ffmpeg.New(tc.ffmpegOpts...).
AddInput(inputs...).
AddOutput(outputs...).
Run(ctx)
}