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Save-to-webm: use timestamp from samplebuilder #130

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Save-to-webm: use timestamp from samplebuilder #130

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5bab82e
Save-to-webm: use timestamp from samplebuilder
tmatth Sep 29, 2022
aca9a01
Save-to-webm: handle timestamp wrap
tmatth Nov 12, 2022
c827071
Save-to-webm: do not force starting ts to 0
tmatth Nov 18, 2022
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21 changes: 14 additions & 7 deletions save-to-webm/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -32,9 +32,10 @@ func main() {
}

type webmSaver struct {
audioWriter, videoWriter webm.BlockWriteCloser
audioBuilder, videoBuilder *samplebuilder.SampleBuilder
audioTimestamp, videoTimestamp time.Duration
audioWriter, videoWriter webm.BlockWriteCloser
audioBuilder, videoBuilder *samplebuilder.SampleBuilder
hasStartAudioOffset, hasStartVideoOffset bool
startAudioOffset, startVideoOffset uint32
}

func newWebmSaver() *webmSaver {
Expand Down Expand Up @@ -66,8 +67,11 @@ func (s *webmSaver) PushOpus(rtpPacket *rtp.Packet) {
return
}
if s.audioWriter != nil {
s.audioTimestamp += sample.Duration
if _, err := s.audioWriter.Write(true, int64(s.audioTimestamp/time.Millisecond), sample.Data); err != nil {
if !s.hasStartAudioOffset {
s.startAudioOffset = sample.PacketTimestamp
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s.hasStartAudioOffset = true
}
if _, err := s.audioWriter.Write(true, int64((sample.PacketTimestamp-s.startAudioOffset)/48), sample.Data); err != nil {
panic(err)
}
}
Expand Down Expand Up @@ -95,8 +99,11 @@ func (s *webmSaver) PushVP8(rtpPacket *rtp.Packet) {
}
}
if s.videoWriter != nil {
s.videoTimestamp += sample.Duration
if _, err := s.videoWriter.Write(videoKeyframe, int64(s.videoTimestamp/time.Millisecond), sample.Data); err != nil {
if !s.hasStartVideoOffset {
s.startVideoOffset = sample.PacketTimestamp
s.hasStartVideoOffset = true
}
if _, err := s.videoWriter.Write(videoKeyframe, int64((sample.PacketTimestamp-s.startVideoOffset)/90), sample.Data); err != nil {
panic(err)
}
}
Expand Down