func (m *Muxer) writeAudioFrame(frame *C.AVFrame) bool {
for C.av_audio_fifo_size(m.fifo) < 1024 { // generate & store in fifo
C.fill_audio_frame(frame, m.audioStream.stream.codec)
frame_size := frame.nb_samples
if C.av_audio_fifo_realloc(m.fifo, C.av_audio_fifo_size(m.fifo)+frame_size) < 0 {
return false
}
if C.av_audio_fifo_write(m.fifo, (*unsafe.Pointer)(unsafe.Pointer(&frame.data[0])), frame_size) < frame_size {
return false
}
}
got_packet := C.int(0)
for C.av_audio_fifo_size(m.fifo) >= 1024 { // read & encode & write
frame_size := C.min(C.av_audio_fifo_size(m.fifo), m.audioStream.stream.codec.frame_size)
output_frame := C.alloc_audio_frame(m.audioStream.stream.codec)
if C.av_audio_fifo_read(m.fifo, (*unsafe.Pointer)(unsafe.Pointer(&output_frame.data[0])), frame_size) < frame_size {
C.av_frame_free(&output_frame)
return false
}
pkt := C.AVPacket{}
C.av_init_packet(&pkt)
output_frame.pts = C.int64_t(m.audioStream.ts)
m.audioStream.ts += int(m.audioStream.stream.codec.frame_size)
if C.avcodec_encode_audio2(m.audioStream.stream.codec, &pkt, frame, &got_packet) < 0 {
C.av_free_packet(&pkt)
return false
}
if got_packet == 0 {
continue
}
C.av_packet_rescale_ts(&pkt, m.audioStream.stream.codec.time_base, m.audioStream.stream.time_base)
pkt.stream_index = m.audioStream.stream.index
if C.av_interleaved_write_frame(m.context, &pkt) < 0 {
return false
}
}
return true
}
func (m *Muxer) writeVideoFrame(frame *C.AVFrame) bool {
if m.capture.Read(frame) != nil {
return false
}
if m.display != nil {
m.display.Render(frame)
}
pkt := C.AVPacket{}
C.av_init_packet(&pkt)
frame.pts = C.int64_t(m.videoStream.ts)
m.videoStream.ts++
got_packet := C.int(0)
if C.avcodec_encode_video2(m.videoStream.stream.codec, &pkt, frame, &got_packet) < 0 {
C.av_free_packet(&pkt)
return false
}
if got_packet == 0 {
return false
}
C.av_packet_rescale_ts(&pkt, m.videoStream.stream.codec.time_base, m.videoStream.stream.time_base)
pkt.stream_index = m.videoStream.stream.index
return C.av_interleaved_write_frame(m.context, &pkt) == 0
}
//Convert valid timing fields (timestamps / durations) in a packet from one timebase to another.
func (p *Packet) AvPacketRescaleTs(r, r2 Rational) {
C.av_packet_rescale_ts((*C.struct_AVPacket)(p), (C.struct_AVRational)(r), (C.struct_AVRational)(r2))
}
//Convert valid timing fields (timestamps / durations) in a packet from one timebase to another.
//void av_packet_rescale_ts (AVPacket *pkt, AVRational tb_src, AVRational tb_dst)
func Av_packet_rescale_ts(p *AVPacket, r, r2 AVRational) {
C.av_packet_rescale_ts((*C.struct_AVPacket)(p), (C.struct_AVRational)(r), (C.struct_AVRational)(r2))
}