(gdb) bt
#0  0x0000555557b2f37d in media::AudioDecoderConfigToAVCodecContext(media::AudioDecoderConfig const&, AVCodecContext*) ()
#1  0x0000555557b20996 in media::FFmpegAudioDecoder::Initialize(media::AudioDecoderConfig const&, media::CdmContext*, base::OnceCallback<void (media::Status)>, base::RepeatingCallback<void (scoped_refptr<media::AudioBuffer>)> const&, base::RepeatingCallback<void (media::WaitingReason)> const&) ()
#2  0x0000555557af6b63 in media::DecoderStreamTraits<(media::DemuxerStream::Type)1>::InitializeDecoder(media::AudioDecoder*, media::AudioDecoderConfig const&, bool, media::CdmContext*, base::OnceCallback<void (media::Status)>, base::RepeatingCallback<void (scoped_refptr<media::AudioBuffer>)> const&, base::RepeatingCallback<void (media::WaitingReason)> const&) ()
#3  0x00005555572099d5 in media::DecoderSelector<(media::DemuxerStream::Type)1>::InitializeDecoder() ()
#4  0x0000555557209637 in media::DecoderSelector<(media::DemuxerStream::Type)1>::SelectDecoder(base::OnceCallback<void (std::unique_ptr<media::AudioDecoder, std::default_delete<media::AudioDecoder> >, std::unique_ptr<media::DecryptingDemuxerStream, std::default_delete<media::DecryptingDemuxerStream> >)>, base::RepeatingCallback<void (scoped_refptr<media::AudioBuffer>)>) ()
#5  0x0000555557af21fa in media::DecoderStream<(media::DemuxerStream::Type)1>::SelectDecoder() ()
#6  0x0000555557af20a7 in media::DecoderStream<(media::DemuxerStream::Type)1>::Initialize(media::DemuxerStream*, base::OnceCallback<void (bool)>, media::CdmContext*, base::RepeatingCallback<void (media::PipelineStatistics const&)>, base::RepeatingCallback<void (media::WaitingReason)>) ()
#7  0x0000555557b33eb7 in media::AudioRendererImpl::OnDeviceInfoReceived(media::DemuxerStream*, media::CdmContext*, media::OutputDeviceInfo) ()
#8  0x0000555557b365a2 in base::internal::Invoker<base::internal::BindState<void (media::AudioRendererImpl::*)(media::DemuxerStream*, media::CdmContext*, media::OutputDeviceInfo), base::WeakPtr<media::AudioRendererImpl>, media::DemuxerStream*, media::CdmContext*>, void (media::OutputDeviceInfo)>::RunOnce(base::internal::BindStateBase*, media::OutputDeviceInfo&&) ()
#9  0x0000555557a662c2 in media::AudioRendererMixerInput::OnDeviceInfoReceived(base::OnceCallback<void (media::OutputDeviceInfo)>, media::OutputDeviceInfo) ()
#10 0x0000555557a6699e in base::internal::Invoker<base::internal::BindState<void (media::AudioRendererMixerInput::*)(base::OnceCallback<void (media::OutputDeviceInfo)>, media::OutputDeviceInfo), base::internal::RetainedRefWrapper<media::AudioRendererMixerInput>, base::OnceCallback<void (media::OutputDeviceInfo)> >, void (media::OutputDeviceInfo)>::RunOnce(base::internal::BindStateBase*, media::OutputDeviceInfo&&) ()
#11 0x0000555557a4cc17 in base::internal::Invoker<base::internal::BindState<base::OnceCallback<void (media::OutputDeviceInfo)>, media::OutputDeviceInfo>, void ()>::RunOnce(base::internal::BindStateBase*) ()
#12 0x0000555559ecba8c in base::TaskAnnotator::RunTask(char const*, base::PendingTask*) ()
#13 0x0000555559edc009 in base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::DoWork() ()
#14 0x0000555559e9228c in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) ()
#15 0x0000555559edc7f4 in base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool, base::TimeDelta) ()
#16 0x0000555559eb573a in base::RunLoop::Run() ()
#17 0x0000555559ef2606 in base::Thread::ThreadMain() ()
#18 0x0000555559f31675 in base::(anonymous namespace)::ThreadFunc(void*) ()
#19 0x00007ffff7f7ff27 in start_thread (arg=<optimized out>) at pthread_create.c:479
#20 0x00007ffff473a67f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95