apps/go2rtc
1
0
Fork 0
mirror of https://github.com/AlexxIT/go2rtc.git synced 2025-09-26 20:31:11 +08:00
Code Issues Packages Projects Releases Wiki Activity

Fix custom OPUS params inside MP4

Browse Source
This commit is contained in:
Alexey Khit
2023-07-23 22:19:35 +03:00
parent e6a87fbd69
commit d73e9f6bcf
1 changed files with 13 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
pkg/iso/codecs.go
View File

@@ -90,10 +90,7 @@ func (m *Movie) WriteAudio(codec string, channels uint16, sampleRate uint32, con
m.Write(pcm.FLACHeader(false, sampleRate))
m.EndAtom()
case core.CodecOpus:
// don't know what means this magic
m.StartAtom("dOps")
m.WriteBytes(0, 0x02, 0x01, 0x38, 0, 0, 0xBB, 0x80, 0, 0, 0)
m.EndAtom()
m.WriteOpus(channels, sampleRate)
case core.CodecPCMU, core.CodecPCMA:
// don't know what means this magic
m.StartAtom("chan")
@@ -170,3 +167,15 @@ func (m *Movie) WriteEsdsMP3() {
m.EndAtom() // ESDS
}
func (m *Movie) WriteOpus(channels uint16, sampleRate uint32) {
// https://www.opus-codec.org/docs/opus_in_isobmff.html
m.StartAtom("dOps")
m.Skip(1) // version
m.WriteBytes(byte(channels))
m.WriteUint16(0) // PreSkip ???
m.WriteUint32(sampleRate)
m.Skip(2) // OutputGain
m.Skip(1) // signed int(16) OutputGain;
m.EndAtom()
}