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package southpark | ||
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import ( | ||
"errors" | ||
"fmt" | ||
"io" | ||
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"github.com/yapingcat/gomedia/go-codec" | ||
"github.com/yapingcat/gomedia/go-mp4" | ||
"github.com/yapingcat/gomedia/go-mpeg2" | ||
) | ||
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func ConvertTSAndAACToMP4(tsInput io.Reader, aacInput io.Reader, mp4Output io.WriteSeeker) error { | ||
var nextAACFrame func() ([]byte, uint64, uint64, bool) | ||
{ | ||
const samplesPerFrame = 1024 | ||
const sampleRate = 48000 | ||
const millisecondsPerFrame = float64(samplesPerFrame) / float64(sampleRate) * 1000 | ||
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aacData, err := io.ReadAll(aacInput) | ||
if err != nil { | ||
return fmt.Errorf("read aac: %w", err) | ||
} | ||
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var aacFrameBuf [][]byte | ||
codec.SplitAACFrame(aacData, func(frame []byte) { | ||
aacFrameBuf = append(aacFrameBuf, frame) | ||
}) | ||
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pts := float64(0) // in ms | ||
dts := float64(0) // in ms | ||
nextAACFrame = func() ([]byte, uint64, uint64, bool) { | ||
if len(aacFrameBuf) == 0 { | ||
return nil, uint64(pts), uint64(dts), false | ||
} | ||
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defer func() { | ||
pts += millisecondsPerFrame | ||
dts += millisecondsPerFrame | ||
}() | ||
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res := aacFrameBuf[0] | ||
aacFrameBuf = aacFrameBuf[1:] | ||
return res, uint64(pts), uint64(dts), true | ||
} | ||
} | ||
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muxer, err := mp4.CreateMp4Muxer(mp4Output) | ||
if err != nil { | ||
return fmt.Errorf("create mp4 muxer: %w", err) | ||
} | ||
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var writeErr error | ||
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// https://github.com/yapingcat/gomedia/blob/main/example/example_convert_ts_to_mp4.go | ||
hasAudio := false | ||
hasVideo := false | ||
var atid uint32 = 0 | ||
var vtid uint32 = 0 | ||
prevADTS := uint64(0) | ||
tsDemuxer := mpeg2.NewTSDemuxer() | ||
tsDemuxer.OnFrame = func(cid mpeg2.TS_STREAM_TYPE, vframe []byte, vpts uint64 /* in ms */, vdts uint64 /* in ms */) { | ||
if cid == mpeg2.TS_STREAM_H264 { | ||
if !hasVideo { | ||
vtid = muxer.AddVideoTrack(mp4.MP4_CODEC_H264) | ||
hasVideo = true | ||
} | ||
if err := muxer.Write(vtid, vframe, uint64(vpts), uint64(vdts)); err != nil { | ||
writeErr = err | ||
} | ||
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for vdts > prevADTS { | ||
if !hasAudio { | ||
atid = muxer.AddAudioTrack(mp4.MP4_CODEC_AAC) | ||
hasAudio = true | ||
} | ||
if aframe, apts, adts, ok := nextAACFrame(); ok { | ||
if err := muxer.Write(atid, aframe, uint64(apts), uint64(adts)); err != nil { | ||
writeErr = err | ||
} | ||
prevADTS = adts | ||
} else { | ||
break | ||
} | ||
} | ||
} | ||
} | ||
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if err := tsDemuxer.Input(tsInput); err != nil { | ||
if errors.Is(err, io.ErrUnexpectedEOF) { | ||
// File is incomplete, ignore | ||
} else { | ||
return fmt.Errorf("MPEG-TS demuxer: %w", err) | ||
} | ||
} | ||
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muxer.WriteTrailer() | ||
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if writeErr != nil { | ||
// Currently only propagates last error | ||
return fmt.Errorf("mp4 muxer: %w", err) | ||
} | ||
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return nil | ||
} | ||
package southpark | ||
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import ( | ||
"errors" | ||
"fmt" | ||
"io" | ||
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"github.com/yapingcat/gomedia/go-codec" | ||
"github.com/yapingcat/gomedia/go-mp4" | ||
"github.com/yapingcat/gomedia/go-mpeg2" | ||
) | ||
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func ConvertTSAndAACToMP4(tsInput io.Reader, aacInput io.Reader, mp4Output io.WriteSeeker) error { | ||
var nextAACFrame func() ([]byte, uint64, uint64, bool) | ||
{ | ||
const samplesPerFrame = 1024 | ||
const sampleRate = 48000 | ||
const millisecondsPerFrame = float64(samplesPerFrame) / float64(sampleRate) * 1000 | ||
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aacData, err := io.ReadAll(aacInput) | ||
if err != nil { | ||
return fmt.Errorf("read aac: %w", err) | ||
} | ||
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var aacFrameBuf [][]byte | ||
codec.SplitAACFrame(aacData, func(frame []byte) { | ||
aacFrameBuf = append(aacFrameBuf, frame) | ||
}) | ||
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pts := float64(0) // in ms | ||
dts := float64(0) // in ms | ||
nextAACFrame = func() ([]byte, uint64, uint64, bool) { | ||
if len(aacFrameBuf) == 0 { | ||
return nil, uint64(pts), uint64(dts), false | ||
} | ||
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defer func() { | ||
pts += millisecondsPerFrame | ||
dts += millisecondsPerFrame | ||
}() | ||
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res := aacFrameBuf[0] | ||
aacFrameBuf = aacFrameBuf[1:] | ||
return res, uint64(pts), uint64(dts), true | ||
} | ||
} | ||
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muxer, err := mp4.CreateMp4Muxer(mp4Output) | ||
if err != nil { | ||
return fmt.Errorf("create mp4 muxer: %w", err) | ||
} | ||
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var writeErr error | ||
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// https://github.com/yapingcat/gomedia/blob/main/example/example_convert_ts_to_mp4.go | ||
hasAudio := false | ||
hasVideo := false | ||
var atid uint32 = 0 | ||
var vtid uint32 = 0 | ||
prevADTS := uint64(0) | ||
tsDemuxer := mpeg2.NewTSDemuxer() | ||
tsDemuxer.OnFrame = func(cid mpeg2.TS_STREAM_TYPE, vframe []byte, vpts uint64 /* in ms */, vdts uint64 /* in ms */) { | ||
if cid == mpeg2.TS_STREAM_H264 { | ||
if !hasVideo { | ||
vtid = muxer.AddVideoTrack(mp4.MP4_CODEC_H264) | ||
hasVideo = true | ||
} | ||
if err := muxer.Write(vtid, vframe, uint64(vpts), uint64(vdts)); err != nil { | ||
writeErr = err | ||
} | ||
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for vdts > prevADTS { | ||
if !hasAudio { | ||
atid = muxer.AddAudioTrack(mp4.MP4_CODEC_AAC) | ||
hasAudio = true | ||
} | ||
if aframe, apts, adts, ok := nextAACFrame(); ok { | ||
if err := muxer.Write(atid, aframe, uint64(apts), uint64(adts)); err != nil { | ||
writeErr = err | ||
} | ||
prevADTS = adts | ||
} else { | ||
break | ||
} | ||
} | ||
} | ||
} | ||
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if err := tsDemuxer.Input(tsInput); err != nil { | ||
if errors.Is(err, io.ErrUnexpectedEOF) { | ||
// File is incomplete, ignore | ||
} else { | ||
return fmt.Errorf("MPEG-TS demuxer: %w", err) | ||
} | ||
} | ||
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muxer.WriteTrailer() | ||
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if writeErr != nil { | ||
// Currently only propagates last error | ||
return fmt.Errorf("mp4 muxer: %w", err) | ||
} | ||
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return nil | ||
} |