Hi. I'm trying to concatenate two .wav files and keep the result in memory only. I'm using Memstream and writing to it using OpenMemstreamWrite. The concatenation process follows example4 of this repo.

When I write the result to a file for testing, it has the correct, increased file size, but the play duration remains at the length of the first file written into the stream.

The same issue arises with any EffectsChain, that would usually change the duration of the audio.

The reason seems to be the .wav header, that needs to be rewritten after finalising the concatenation or effects chain flow.

Running "sox --ignore-length file.wav file_fixed.wav", fixes the file.

Any idea how to work around this and get the header rewritten inside the Memstream without writing any files to disk?

Thanks

func ExtractorSoxFaster(filename string) (map[string]string, error) {

	if !sox.Init() {
		return nil, errors.New("Failed to initialize SoX")
	}
	defer sox.Quit()

	in := sox.OpenRead(filename) //error here 
	if in == nil {
		return nil, errors.New("Failed to open input file")
	}
	defer in.Release()

// more here...
}

[signal SIGSEGV: segmentation violation code=0x1 addr=0x7fbe145f6900 pc=0x7fbe145f6900]

runtime stack:
runtime.throw(0x8d0ecf, 0x2a)
	/usr/local/go/src/runtime/panic.go:596 +0x95
runtime.sigpanic()
	/usr/local/go/src/runtime/signal_unix.go:274 +0x2db

goroutine 89 [syscall, locked to thread]:
runtime.cgocall(0x7d9610, 0xc420159450, 0x1)
	/usr/local/go/src/runtime/cgocall.go:131 +0xe2 fp=0xc420159420 sp=0xc4201593e0
app.com/utils/vendor/github.com/krig/go-sox._Cfunc_sox_open_read(0x7fbdf80059b0, 0x0, 0x0, 0x0, 0x0)
	app.com/utils/vendor/github.com/krig/go-sox/_obj/_cgo_gotypes.go:791 +0x4e fp=0xc420159450 sp=0xc420159420
app.com/utils/vendor/github.com/krig/go-sox.OpenRead(0xc420281680, 0x32, 0x8bf4f3)
	/srv/go/src/app.com/utils/vendor/github.com/krig/go-sox/sox.go:352 +0x8d fp=0xc420159498 sp=0xc420159450
app.com/utils/modules/scripts/waveform.ExtractorSoxFaster(0xc420281680, 0x32, 0x0, 0x0, 0x0)
	/srv/go/src/app.com/utils/modules/scripts/waveform/extractor.go:165 +0x110 fp=0xc4201595b8 sp=0xc420159498
app.com/utils/modules/extractor.GetSongWaveform(0xc420422a60, 0x17, 0x0, 0x0, 0xc420367050, 0x6, 0xc4202815c0, 0x31, 0xc420281600, 0x37, ...)
	/srv/go/src/app.com/utils/modules/extractor/waveform.go:11 +0x70 fp=0xc420159668 sp=0xc4201595b8
app.com/utils/commands.SongWaveformUpdate(0xc420124568, 0x6, 0x0, 0x0, 0x0)
	/srv/go/src/app.com/utils/commands/song.go:545 +0x3e5 fp=0xc4201598c0 sp=0xc420159668
main.main.func1(0xc420124568, 0x6, 0x0, 0x0, 0x0, 0x0)
	/srv/go/src/app.com/utils/cmd/job/main.go:45 +0x287 fp=0xc420159960 sp=0xc4201598c0
runtime.call64(0xc420132630, 0x8fd148, 0xc420242270, 0x1000000030)
	/usr/local/go/src/runtime/asm_amd64.s:515 +0x48 fp=0xc4201599b0 sp=0xc420159960
reflect.Value.call(0x839cc0, 0x8fd148, 0x13, 0x8bf553, 0x4, 0xc4201f6b00, 0x1, 0x1, 0xc420493d68, 0xc420493d60, ...)
	/usr/local/go/src/reflect/value.go:434 +0x91f fp=0xc420159cf8 sp=0xc4201599b0
reflect.Value.Call(0x839cc0, 0x8fd148, 0x13, 0xc4201f6b00, 0x1, 0x1, 0x0, 0x0, 0xc420014180)
	/usr/local/go/src/reflect/value.go:302 +0xa4 fp=0xc420159d60 sp=0xc420159cf8
app.com/utils/vendor/github.com/RichardKnop/machinery/v1.TryCall(0x839cc0, 0x8fd148, 0x13, 0xc4201f6b00, 0x1, 0x1, 0x0, 0x0, 0x0, 0x0, ...)
	/srv/go/src/app.com/utils/vendor/github.com/RichardKnop/machinery/v1/worker.go:249 +0xf1 fp=0xc420159db8 sp=0xc420159d60
app.com/utils/vendor/github.com/RichardKnop/machinery/v1.(*Worker).Process(0xc42011a3c0, 0xc42008ee70, 0x105, 0x83ee40)
	/srv/go/src/app.com/utils/vendor/github.com/RichardKnop/machinery/v1/worker.go:91 +0x42c fp=0xc420159eb0 sp=0xc420159db8
app.com/utils/vendor/github.com/RichardKnop/machinery/v1/brokers.(*RedisBroker).consumeOne(0xc42009f900, 0xc420114360, 0x105, 0x105, 0xcefa40, 0xc42011a3c0)
	/srv/go/src/app.com/utils/vendor/github.com/RichardKnop/machinery/v1/brokers/redis.go:219 +0x1af fp=0xc420159f60 sp=0xc420159eb0
app.com/utils/vendor/github.com/RichardKnop/machinery/v1/brokers.(*RedisBroker).consume.func2(0xc42009f900, 0xc420114360, 0x105, 0x105, 0xcefa40, 0xc42011a3c0, 0x0, 0xc42006eba0)
	/srv/go/src/app.com/utils/vendor/github.com/RichardKnop/machinery/v1/brokers/redis.go:248 +0x61 fp=0xc420159fa0 sp=0xc420159f60
runtime.goexit()
	/usr/local/go/src/runtime/asm_amd64.s:2197 +0x1 fp=0xc420159fa8 sp=0xc420159fa0
created by app.com/utils/vendor/github.com/RichardKnop/machinery/v1/brokers.(*RedisBroker).consume
	/srv/go/src/app.com/utils/vendor/github.com/RichardKnop/machinery/v1/brokers/redis.go:253 +0x233

goroutine 1 [chan receive]:
app.com/utils/vendor/github.com/RichardKnop/machinery/v1.(*Worker).Launch(0xc42011a3c0, 0xc42011a3c0, 0xc42004bf48)
	/srv/go/src/app.com/utils/vendor/github.com/RichardKnop/machinery/v1/worker.go:50 +0x654
main.main()
	/srv/go/src/app.com/utils/cmd/job/main.go:238 +0xa4a

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
	/usr/local/go/src/runtime/asm_amd64.s:2197 +0x1

goroutine 5 [select]:
app.com/utils/vendor/github.com/RichardKnop/machinery/v1/brokers.(*RedisBroker).consume(0xc42009f900, 0xc42006eb40, 0xcefa40, 0xc42011a3c0, 0x0, 0x0)
	/srv/go/src/app.com/utils/vendor/github.com/RichardKnop/machinery/v1/brokers/redis.go:237 +0x2da
app.com/utils/vendor/github.com/RichardKnop/machinery/v1/brokers.(*RedisBroker).StartConsuming(0xc42009f900, 0x8bf723, 0x4, 0xcefa40, 0xc42011a3c0, 0x0, 0x0, 0x0)
	/srv/go/src/app.com/utils/vendor/github.com/RichardKnop/machinery/v1/brokers/redis.go:142 +0x28a
app.com/utils/vendor/github.com/RichardKnop/machinery/v1.(*Worker).Launch.func1(0xcf70a0, 0xc42009f900, 0xc42011a3c0, 0xc42006e960)
	/srv/go/src/app.com/utils/vendor/github.com/RichardKnop/machinery/v1/worker.go:39 +0x74
created by app.com/utils/vendor/github.com/RichardKnop/machinery/v1.(*Worker).Launch
	/srv/go/src/app.com/utils/vendor/github.com/RichardKnop/machinery/v1/worker.go:48 +0x612

goroutine 6 [IO wait]:
net.runtime_pollWait(0x7fbe1f5ad158, 0x72, 0x6)
	/usr/local/go/src/runtime/netpoll.go:164 +0x59
net.(*pollDesc).wait(0xc420013568, 0x72, 0xcf0e80, 0xced520)
	/usr/local/go/src/net/fd_poll_runtime.go:75 +0x38
net.(*pollDesc).waitRead(0xc420013568, 0xc42011f000, 0x1000)
	/usr/local/go/src/net/fd_poll_runtime.go:80 +0x34
net.(*netFD).Read(0xc420013500, 0xc42011f000, 0x1000, 0x1000, 0x0, 0xcf0e80, 0xced520)
	/usr/local/go/src/net/fd_unix.go:250 +0x1b7
net.(*conn).Read(0xc42000e0a8, 0xc42011f000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/net.go:181 +0x70
bufio.(*Reader).fill(0xc42006ec00)
	/usr/local/go/src/bufio/bufio.go:97 +0x117
bufio.(*Reader).ReadSlice(0xc42006ec00, 0xa, 0xc420047bd0, 0x0, 0x8fd220, 0xc420047be0, 0xc420047bd0)
	/usr/local/go/src/bufio/bufio.go:338 +0xbb
app.com/utils/vendor/github.com/RichardKnop/machinery/vendor/github.com/garyburd/redigo/redis.(*conn).readLine(0xc42009fa40, 0x0, 0x2c, 0x8bf171, 0x0, 0x0)
	/srv/go/src/app.com/utils/vendor/github.com/RichardKnop/machinery/vendor/github.com/garyburd/redigo/redis/conn.go:341 +0x49
app.com/utils/vendor/github.com/RichardKnop/machinery/vendor/github.com/garyburd/redigo/redis.(*conn).readReply(0xc42009fa40, 0x0, 0x0, 0xc4201f68e0, 0x2)
	/srv/go/src/app.com/utils/vendor/github.com/RichardKnop/machinery/vendor/github.com/garyburd/redigo/redis/conn.go:414 +0x43
app.com/utils/vendor/github.com/RichardKnop/machinery/vendor/github.com/garyburd/redigo/redis.(*conn).Do(0xc42009fa40, 0x8bf91d, 0x5, 0xc4201f68e0, 0x2, 0x2, 0x822260, 0xc4201244c0, 0xc420047f70, 0xc4201244c0)
	/srv/go/src/app.com/utils/vendor/github.com/RichardKnop/machinery/vendor/github.com/garyburd/redigo/redis/conn.go:562 +0x11f
app.com/utils/vendor/github.com/RichardKnop/machinery/vendor/github.com/garyburd/redigo/redis.(*pooledConnection).Do(0xc42011a5e0, 0x8bf91d, 0x5, 0xc4201f68e0, 0x2, 0x2, 0x0, 0x0, 0x0, 0x0)
	/srv/go/src/app.com/utils/vendor/github.com/RichardKnop/machinery/vendor/github.com/garyburd/redigo/redis/pool.go:369 +0xa3
app.com/utils/vendor/github.com/RichardKnop/machinery/v1/brokers.(*RedisBroker).StartConsuming.func1(0xc42009f900, 0xc42006eb40)
	/srv/go/src/app.com/utils/vendor/github.com/RichardKnop/machinery/v1/brokers/redis.go:96 +0x2b6
created by app.com/utils/vendor/github.com/RichardKnop/machinery/v1/brokers.(*RedisBroker).StartConsuming
	/srv/go/src/app.com/utils/vendor/github.com/RichardKnop/machinery/v1/brokers/redis.go:140 +0x258

goroutine 12 [IO wait]:
net.runtime_pollWait(0x7fbe1f5ace58, 0x72, 0xa)
	/usr/local/go/src/runtime/netpoll.go:164 +0x59
net.(*pollDesc).wait(0xc420142688, 0x72, 0xcf0e80, 0xced520)
	/usr/local/go/src/net/fd_poll_runtime.go:75 +0x38
net.(*pollDesc).waitRead(0xc420142688, 0xc420118c00, 0x400)
	/usr/local/go/src/net/fd_poll_runtime.go:80 +0x34
net.(*netFD).Read(0xc420142620, 0xc420118c00, 0x400, 0x400, 0x0, 0xcf0e80, 0xced520)
	/usr/local/go/src/net/fd_unix.go:250 +0x1b7
net.(*conn).Read(0xc42000e0b8, 0xc420118c00, 0x400, 0x400, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/net.go:181 +0x70
crypto/tls.(*block).readFromUntil(0xc420117830, 0x7fbe1f5ad2d8, 0xc42000e0b8, 0x5, 0xc42000e0b8, 0x46b200)
	/usr/local/go/src/crypto/tls/conn.go:488 +0x98
crypto/tls.(*Conn).readRecord(0xc420099180, 0x8fdd17, 0xc4200992a0, 0x42abc6)
	/usr/local/go/src/crypto/tls/conn.go:590 +0xc4
crypto/tls.(*Conn).Read(0xc420099180, 0xc42044e000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/go/src/crypto/tls/conn.go:1134 +0x11d
bufio.(*Reader).Read(0xc42006e8a0, 0xc4200706b8, 0x9, 0x9, 0xc42019ec60, 0xc42019ec60, 0x413292)
	/usr/local/go/src/bufio/bufio.go:213 +0x312
io.ReadAtLeast(0xceeb40, 0xc42006e8a0, 0xc4200706b8, 0x9, 0x9, 0x9, 0xc420389920, 0xc42019ed00, 0x8bfa00)
	/usr/local/go/src/io/io.go:307 +0xa9
io.ReadFull(0xceeb40, 0xc42006e8a0, 0xc4200706b8, 0x9, 0x9, 0xc420367001, 0xc420367000, 0x0)
	/usr/local/go/src/io/io.go:325 +0x58
net/http.http2readFrameHeader(0xc4200706b8, 0x9, 0x9, 0xceeb40, 0xc42006e8a0, 0x0, 0xc400000000, 0xc420597400, 0x10a)
	/usr/local/go/src/net/http/h2_bundle.go:781 +0x7b
net/http.(*http2Framer).ReadFrame(0xc420070680, 0xc420213a70, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/http/h2_bundle.go:1008 +0xa4
net/http.(*http2clientConnReadLoop).run(0xc42019efb0, 0x8fd3b0, 0xc420480fb0)
	/usr/local/go/src/net/http/h2_bundle.go:6626 +0x88
net/http.(*http2ClientConn).readLoop(0xc420001ba0)
	/usr/local/go/src/net/http/h2_bundle.go:6555 +0xa6
created by net/http.(*http2Transport).newClientConn
	/usr/local/go/src/net/http/h2_bundle.go:5880 +0x728

goroutine 47 [IO wait]:
net.runtime_pollWait(0x7fbe1f5acd98, 0x72, 0xb)
	/usr/local/go/src/runtime/netpoll.go:164 +0x59
net.(*pollDesc).wait(0xc4202fe308, 0x72, 0xcf0e80, 0xced520)
	/usr/local/go/src/net/fd_poll_runtime.go:75 +0x38
net.(*pollDesc).waitRead(0xc4202fe308, 0xc4201ee000, 0x800)
	/usr/local/go/src/net/fd_poll_runtime.go:80 +0x34
net.(*netFD).Read(0xc4202fe2a0, 0xc4201ee000, 0x800, 0x800, 0x0, 0xcf0e80, 0xced520)
	/usr/local/go/src/net/fd_unix.go:250 +0x1b7
net.(*conn).Read(0xc42013c008, 0xc4201ee000, 0x800, 0x800, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/net.go:181 +0x70
crypto/tls.(*block).readFromUntil(0xc4201160c0, 0x7fbe1f5ad2d8, 0xc42013c008, 0x5, 0xc42013c008, 0x46b203)
	/usr/local/go/src/crypto/tls/conn.go:488 +0x98
crypto/tls.(*Conn).readRecord(0xc4202ca000, 0x8fdd17, 0xc4202ca120, 0x42abc6)
	/usr/local/go/src/crypto/tls/conn.go:590 +0xc4
crypto/tls.(*Conn).Read(0xc4202ca000, 0xc420416000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/go/src/crypto/tls/conn.go:1134 +0x11d
bufio.(*Reader).Read(0xc420388c60, 0xc42013e2a8, 0x9, 0x9, 0x40e062, 0x8c1948, 0x8c1736)
	/usr/local/go/src/bufio/bufio.go:213 +0x312
io.ReadAtLeast(0xceeb40, 0xc420388c60, 0xc42013e2a8, 0x9, 0x9, 0x9, 0xc42006fa40, 0xc420038d00, 0x8bfa00)
	/usr/local/go/src/io/io.go:307 +0xa9
io.ReadFull(0xceeb40, 0xc420388c60, 0xc42013e2a8, 0x9, 0x9, 0xc420349001, 0xc420349010, 0x0)
	/usr/local/go/src/io/io.go:325 +0x58
net/http.http2readFrameHeader(0xc42013e2a8, 0x9, 0x9, 0xceeb40, 0xc420388c60, 0x0, 0xc400000000, 0xc42012ec80, 0x3ee)
	/usr/local/go/src/net/http/h2_bundle.go:781 +0x7b
net/http.(*http2Framer).ReadFrame(0xc42013e270, 0xc4201f33e0, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/http/h2_bundle.go:1008 +0xa4
net/http.(*http2clientConnReadLoop).run(0xc420038fb0, 0x8fd3b0, 0xc42047dfb0)
	/usr/local/go/src/net/http/h2_bundle.go:6626 +0x88
net/http.(*http2ClientConn).readLoop(0xc4202b04e0)
	/usr/local/go/src/net/http/h2_bundle.go:6555 +0xa6
created by net/http.(*http2Transport).newClientConn
	/usr/local/go/src/net/http/h2_bundle.go:5880 +0x728

goroutine 87 [IO wait]:
net.runtime_pollWait(0x7fbe1f5accd8, 0x72, 0xc)
	/usr/local/go/src/runtime/netpoll.go:164 +0x59
net.(*pollDesc).wait(0xc4202fe848, 0x72, 0xcf0e80, 0xced520)
	/usr/local/go/src/net/fd_poll_runtime.go:75 +0x38
net.(*pollDesc).waitRead(0xc4202fe848, 0xc42044b000, 0x1000)
	/usr/local/go/src/net/fd_poll_runtime.go:80 +0x34
net.(*netFD).Read(0xc4202fe7e0, 0xc42044b000, 0x1000, 0x1000, 0x0, 0xcf0e80, 0xced520)
	/usr/local/go/src/net/fd_unix.go:250 +0x1b7
net.(*conn).Read(0xc42013c088, 0xc42044b000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/net.go:181 +0x70
crypto/tls.(*block).readFromUntil(0xc420017e60, 0x7fbe1f5ad2d8, 0xc42013c088, 0x5, 0xc42013c088, 0xc420063040)
	/usr/local/go/src/crypto/tls/conn.go:488 +0x98
crypto/tls.(*Conn).readRecord(0xc42020ce00, 0x8fdd17, 0xc42020cf20, 0xc420019368)
	/usr/local/go/src/crypto/tls/conn.go:590 +0xc4
crypto/tls.(*Conn).Read(0xc42020ce00, 0xc4204d3000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/go/src/crypto/tls/conn.go:1134 +0x11d
bufio.(*Reader).Read(0xc420389ce0, 0xc42013eed8, 0x9, 0x9, 0x0, 0x0, 0x100000000000000)
	/usr/local/go/src/bufio/bufio.go:213 +0x312
io.ReadAtLeast(0xceeb40, 0xc420389ce0, 0xc42013eed8, 0x9, 0x9, 0x9, 0x42abc6, 0x1000, 0x11)
	/usr/local/go/src/io/io.go:307 +0xa9
io.ReadFull(0xceeb40, 0xc420389ce0, 0xc42013eed8, 0x9, 0x9, 0x3, 0xc420019350, 0xc420019300)
	/usr/local/go/src/io/io.go:325 +0x58
net/http.http2readFrameHeader(0xc42013eed8, 0x9, 0x9, 0xceeb40, 0xc420389ce0, 0x0, 0x0, 0x8fddc0, 0xc42048dda8)
	/usr/local/go/src/net/http/h2_bundle.go:781 +0x7b
net/http.(*http2Framer).ReadFrame(0xc42013eea0, 0xc4204d0ee0, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/http/h2_bundle.go:1008 +0xa4
net/http.(*http2clientConnReadLoop).run(0xc42048dfb0, 0x8fd3b0, 0xc42047dfb0)
	/usr/local/go/src/net/http/h2_bundle.go:6626 +0x88
net/http.(*http2ClientConn).readLoop(0xc4202b1ba0)
	/usr/local/go/src/net/http/h2_bundle.go:6555 +0xa6
created by net/http.(*http2Transport).newClientConn
	/usr/local/go/src/net/http/h2_bundle.go:5880 +0x728

goroutine 72 [IO wait]:
net.runtime_pollWait(0x7fbe1f5ad218, 0x72, 0x4)
	/usr/local/go/src/runtime/netpoll.go:164 +0x59
net.(*pollDesc).wait(0xc4202fe458, 0x72, 0xcf0e80, 0xced520)
	/usr/local/go/src/net/fd_poll_runtime.go:75 +0x38
net.(*pollDesc).waitRead(0xc4202fe458, 0xc420109000, 0x800)
	/usr/local/go/src/net/fd_poll_runtime.go:80 +0x34
net.(*netFD).Read(0xc4202fe3f0, 0xc420109000, 0x800, 0x800, 0x0, 0xcf0e80, 0xced520)
	/usr/local/go/src/net/fd_unix.go:250 +0x1b7
net.(*conn).Read(0xc42000e160, 0xc420109000, 0x800, 0x800, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/net.go:181 +0x70
crypto/tls.(*block).readFromUntil(0xc4201f20c0, 0x7fbe1f5ad2d8, 0xc42000e160, 0x5, 0xc42000e160, 0x28)
	/usr/local/go/src/crypto/tls/conn.go:488 +0x98
crypto/tls.(*Conn).readRecord(0xc420098380, 0x8fdd17, 0xc4200984a0, 0x4537b0)
	/usr/local/go/src/crypto/tls/conn.go:590 +0xc4
crypto/tls.(*Conn).Read(0xc420098380, 0xc4201d0000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/go/src/crypto/tls/conn.go:1134 +0x11d
net/http.(*persistConn).Read(0xc42012b0e0, 0xc4201d0000, 0x1000, 0x1000, 0x5, 0x451a80, 0xc42014b080)
	/usr/local/go/src/net/http/transport.go:1316 +0x14b
bufio.(*Reader).fill(0xc42014af00)
	/usr/local/go/src/bufio/bufio.go:97 +0x117
bufio.(*Reader).Peek(0xc42014af00, 0x1, 0xc42019cbe5, 0xc4201df201, 0x4, 0xc42014af60, 0x0)
	/usr/local/go/src/bufio/bufio.go:129 +0x67
net/http.(*persistConn).readLoop(0xc42012b0e0)
	/usr/local/go/src/net/http/transport.go:1474 +0x196
created by net/http.(*Transport).dialConn
	/usr/local/go/src/net/http/transport.go:1117 +0xa35

goroutine 73 [select]:
net/http.(*persistConn).writeLoop(0xc42012b0e0)
	/usr/local/go/src/net/http/transport.go:1704 +0x43a
created by net/http.(*Transport).dialConn
	/usr/local/go/src/net/http/transport.go:1118 +0xa5a

goroutine 101 [runnable]:
net/http.(*http2clientStream).awaitRequestCancel(0xc420597400, 0xc42006c500)
	/usr/local/go/src/net/http/h2_bundle.go:5576
created by net/http.(*http2clientConnReadLoop).handleResponse
	/usr/local/go/src/net/http/h2_bundle.go:6811 +0x6f7

Hey there. Thanks for working on this - great tool. I'm wondering if there's an easy way to downconvert sample rate of a file. In command line sox, I would just do:

sox in.wav -r 16000 out.wav

I can set the rate on the input and the output, but it seems to just slow the audio down, rather than cutting/interpolating samples.

Thanks!

Currently, when compiling sox-go in OSX, it fails because pkg-config is not found on that platform. With this change, conditional linking directives are added that are platform specific. For OSX, a brew install sox is needed for the directives provided to work and link correctly.

Commit c7881d081d9534bc22951173c93e6a4dc484ddea (Merging of #5) accidentally introduced an empty, unconfigured git-sox submodule which causes all kinds of trouble for me when building on nixos.

This PR removes the submodule, as it is empty and serves no purpose anyway.

For one of my projects, I need to be able to provide the file type when calling OpenRead, as the filename of the file to be read does not contain an extension.

This PR adds an OpenRead0 function allowing to set all parameters of sox_open_read.

Just ran

gofmt -w .

on the project root. That's all.

https://blog.golang.org/go-fmt-your-code

I made this PR with a project going on over at https://github.com/rotblauer/gofmt-att, and it's definitely a work in progress. So if I got something wrong, or this is annoying at all, please file an issue over there and we'll sort it out.

I tried to use the go-sox in multiple threads access that it is for multiple HTTP streaming audio convert, but when I start the second thread, it will crash as below shows

main: effects_i_dsp.c:168: init_fft_cache: Assertion `lsx_fft_br == ((void *)0)' failed. INFO[0018] call: --> ACCEPT 16777232
SIGABRT: abort PC=0x7f7dc0a02277 m=7 sigcode=18446744073709551610 signal arrived during cgo execution

goroutine 31 [syscall, locked to thread]: runtime.cgocall(0x8bc0f0, 0xc42002b700, 0x0) /usr/local/go/src/runtime/cgocall.go:132 +0xe4 fp=0xc42002b6d0 sp=0xc42002b690 pc=0x412bd4 github.com/krig/go-sox._Cfunc_sox_init(0x0) github.com/krig/go-sox/_obj/_cgo_gotypes.go:713 +0x49 fp=0xc42002b700 sp=0xc42002b6d0 pc=0x73aff9 github.com/krig/go-sox.Init(0x0) /root/work/src/github.com/krig/go-sox/sox.go:134 +0x22 fp=0xc42002b718 sp=0xc42002b700 pc=0x73b982 git.xxxxtech.com/xxxxcloud/dataprocessor.(*Dataprocessor).NewProducer.func1(0xc42014a600, 0xc420143360, 0xc420135890) /root/work/src/git.xxxxtech.com/xxxxcloud/dataprocessor/dprocessor.go:46 +0x34 fp=0xc42002b7c8 sp=0xc42002b718 pc=0x7414e4 runtime.goexit() /usr/local/go/src/runtime/asm_amd64.s:2337 +0x1 fp=0xc42002b7d0 sp=0xc42002b7c8 pc=0x46df21 created by git.xxxxtech.com/xxxxcloud/dataprocessor.(*Dataprocessor).NewProducer /root/work/src/git.xxxxtech.com/xxxxcloud/dataprocessor/dprocessor.go:45 +0xa0

goroutine 1 [semacquire]: sync.runtime_Semacquire(0xc4201440fc) /usr/local/go/src/runtime/sema.go:56 +0x39 sync.(*WaitGroup).Wait(0xc4201440f0) /usr/local/go/src/sync/waitgroup.go:131 +0x72 main.run(0xc420196000) /root/work/src/git.xxxxtech.com/xxxxcloud/main/main.go:162 +0x7e6 github.com/urfave/cli.HandleAction(0x90e680, 0x9ef578, 0xc420196000, 0xc4201541e0, 0x0) /root/work/src/github.com/urfave/cli/app.go:503 +0x7c github.com/urfave/cli.(*App).Run(0xc420190000, 0xc420010090, 0x3, 0x3, 0x0, 0x0) /root/work/src/github.com/urfave/cli/app.go:268 +0x653 main.main() /root/work/src/git.xxxxtech.com/xxxxcloud/main/main.go:70 +0x72e

goroutine 5 [syscall]: os/signal.signal_recv(0x0) /usr/local/go/src/runtime/sigqueue.go:131 +0xa6 os/signal.loop() /usr/local/go/src/os/signal/signal_unix.go:22 +0x22 created by os/signal.init.0 /usr/local/go/src/os/signal/signal_unix.go:28 +0x41

goroutine 8 [chan receive]: git.xxxxtech.com/xxxxcloud/eventsprocessor.(*g_System).Exit.func1(0xc420154300, 0xc420132820) /root/work/src/git.xxxxtech.com/xxxxcloud/eventsprocessor/eprocessor.go:61 +0x4b created by git.xxxxtech.com/xxxxcloud/eventsprocessor.(*g_System).Exit /root/work/src/git.xxxxtech.com/xxxxcloud/eventsprocessor/eprocessor.go:60 +0xe9

goroutine 18 [chan receive]: gopkg.in/natefinch/lumberjack%2ev2.(*Logger).millRun(0xc420154240) /root/work/src/gopkg.in/natefinch/lumberjack.v2/lumberjack.go:379 +0x58 created by gopkg.in/natefinch/lumberjack%2ev2.(*Logger).mill.func1 /root/work/src/gopkg.in/natefinch/lumberjack.v2/lumberjack.go:390 +0x7e

goroutine 19 [chan receive]: database/sql.(*DB).connectionOpener(0xc42019e000) /usr/local/go/src/database/sql/sql.go:871 +0x53 created by database/sql.Open /usr/local/go/src/database/sql/sql.go:609 +0x1ee

goroutine 7 [IO wait]: internal/poll.runtime_pollWait(0x7f7dc20e9f70, 0x72, 0xffffffffffffffff) /usr/local/go/src/runtime/netpoll.go:173 +0x57 internal/poll.(*pollDesc).wait(0xc42011e118, 0x72, 0xc420040c00, 0x0, 0x0) /usr/local/go/src/internal/poll/fd_poll_runtime.go:85 +0xae internal/poll.(*pollDesc).waitRead(0xc42011e118, 0xffffffffffffff00, 0x0, 0x0) /usr/local/go/src/internal/poll/fd_poll_runtime.go:90 +0x3d internal/poll.(*FD).Accept(0xc42011e100, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0) /usr/local/go/src/internal/poll/fd_unix.go:334 +0x1e2 net.(*netFD).accept(0xc42011e100, 0x7f7dc2145000, 0x0, 0x9eff00) /usr/local/go/src/net/fd_unix.go:238 +0x42 net.(*TCPListener).accept(0xc42000e148, 0xc420040e78, 0x422358, 0x30) /usr/local/go/src/net/tcpsock_posix.go:136 +0x2e net.(*TCPListener).AcceptTCP(0xc42000e148, 0xc4201b8210, 0xc4201b8210, 0x930700) /usr/local/go/src/net/tcpsock.go:234 +0x49 net/http.tcpKeepAliveListener.Accept(0xc42000e148, 0xc4200140a0, 0x930700, 0xe5b6d0, 0x9aea40) /usr/local/go/src/net/http/server.go:3120 +0x2f net/http.(*Server).Serve(0xc4200752b0, 0xe734e0, 0xc42000e148, 0x0, 0x0) /usr/local/go/src/net/http/server.go:2695 +0x1b2 net/http.(*Server).ListenAndServe(0xc4200752b0, 0xc420060300, 0x0) /usr/local/go/src/net/http/server.go:2636 +0xa9 created by git.xxxxtech.com/xxxxcloud/api.Run /root/work/src/git.xxxxtech.com/xxxxcloud/api/api.go:22 +0x11b

goroutine 21 [chan receive]: git.xxxxtech.com/xxxxcloud/api.Run(0xc4201429c0) /root/work/src/git.xxxxtech.com/xxxxcloud/api/api.go:26 +0x155 created by main.run /root/work/src/git.xxxxtech.com/xxxxcloud/main/main.go:144 +0x6af

goroutine 22 [select, locked to thread]: runtime.gopark(0x9efdd8, 0x0, 0x9c1f36, 0x6, 0x18, 0x1) /usr/local/go/src/runtime/proc.go:277 +0x12c runtime.selectgo(0xc42003af50, 0xc42014a1e0) /usr/local/go/src/runtime/select.go:395 +0x1138 runtime.ensureSigM.func1() /usr/local/go/src/runtime/signal_unix.go:511 +0x220 runtime.goexit() /usr/local/go/src/runtime/asm_amd64.s:2337 +0x1

goroutine 9 [runnable, locked to thread]: git.xxxxtech.com/hmp/grandprix-go._Cfunc_PKX_SYSTEM_WaitOnEvent(0xffffffff, 0xc4201888a0, 0xc400000000) git.xxxxtech.com/hmp/grandprix-go/_obj/_cgo_gotypes.go:2612 +0x4d git.xxxxtech.com/hmp/grandprix-go.systemWaitOnEvent(0xc4ffffffff, 0xc420053bc8, 0x2, 0x2) /root/work/src/git.xxxxtech.com/hmp/grandprix-go/system_hmp.go:63 +0x47 git.xxxxtech.com/hmp/grandprix-go.SystemWaitOnEvent(0xc4ffffffff, 0x2, 0x2, 0xc420144b28) /root/work/src/git.xxxxtech.com/hmp/grandprix-go/system.go:22 +0x29 git.xxxxtech.com/xxxxcloud/eventsprocessor.(*g_System).EventProcess(0xc420132820) /root/work/src/git.xxxxtech.com/xxxxcloud/eventsprocessor/eprocessor.go:88 +0x60 main.run.func1(0xc4201440f0, 0xc420132820) /root/work/src/git.xxxxtech.com/xxxxcloud/main/main.go:160 +0x51 created by main.run /root/work/src/git.xxxxtech.com/xxxxcloud/main/main.go:158 +0x7d5

goroutine 23 [select]: net/http.(*persistConn).readLoop(0xc4200a3680) /usr/local/go/src/net/http/transport.go:1654 +0x7a7 created by net/http.(*Transport).dialConn /usr/local/go/src/net/http/transport.go:1186 +0xa2e

goroutine 16 [select]: git.xxxxtech.com/xxxxcloud/rbuffer.NewEQ.func1(0xc4200e1820) /root/work/src/git.xxxxtech.com/xxxxcloud/rbuffer/eq.go:30 +0x444 created by git.xxxxtech.com/xxxxcloud/rbuffer.NewEQ /root/work/src/git.xxxxtech.com/xxxxcloud/rbuffer/eq.go:25 +0x157

goroutine 24 [select]: net/http.(*persistConn).writeLoop(0xc4200a3680) /usr/local/go/src/net/http/transport.go:1759 +0x165 created by net/http.(*Transport).dialConn /usr/local/go/src/net/http/transport.go:1187 +0xa53

goroutine 34 [IO wait]: internal/poll.runtime_pollWait(0x7f7dc20e9df0, 0x72, 0x0) /usr/local/go/src/runtime/netpoll.go:173 +0x57 internal/poll.(*pollDesc).wait(0xc42011e618, 0x72, 0xffffffffffffff00, 0xe6fce0, 0xe6b240) /usr/local/go/src/internal/poll/fd_poll_runtime.go:85 +0xae internal/poll.(*pollDesc).waitRead(0xc42011e618, 0xc4201e9b00, 0x6101, 0x6101) /usr/local/go/src/internal/poll/fd_poll_runtime.go:90 +0x3d internal/poll.(*FD).Read(0xc42011e600, 0xc4201e9bff, 0x6101, 0x6101, 0x0, 0x0, 0x0) /usr/local/go/src/internal/poll/fd_unix.go:125 +0x18a net.(*netFD).Read(0xc42011e600, 0xc4201e9bff, 0x6101, 0x6101, 0x1bff, 0x0, 0x0) /usr/local/go/src/net/fd_unix.go:202 +0x52 net.(*conn).Read(0xc4201400b0, 0xc4201e9bff, 0x6101, 0x6101, 0x0, 0x0, 0x0) /usr/local/go/src/net/net.go:176 +0x6d net/http.(*persistConn).Read(0xc4200a3680, 0xc4201e9bff, 0x6101, 0x6101, 0x43bb78, 0x0, 0x0) /usr/local/go/src/net/http/transport.go:1391 +0x140 bufio.(*Reader).Read(0xc420154540, 0xc4201e9bff, 0x6101, 0x6101, 0x43b4b9, 0xc400000008, 0xc4201ba780) /usr/local/go/src/bufio/bufio.go:199 +0x1a3 net/http.(*body).readLocked(0xc4201ba980, 0xc4201e9bff, 0x6101, 0x6101, 0x1bff, 0x0, 0x0) /usr/local/go/src/net/http/transfer.go:779 +0x67 net/http.(*body).Read(0xc4201ba980, 0xc4201e9bff, 0x6101, 0x6101, 0x0, 0x0, 0x0) /usr/local/go/src/net/http/transfer.go:771 +0xea net/http.(*bodyEOFSignal).Read(0xc4201ba9c0, 0xc4201e9bff, 0x6101, 0x6101, 0x0, 0x0, 0x0) /usr/local/go/src/net/http/transport.go:2124 +0xe9 io.ReadAtLeast(0xe6dfa0, 0xc4201ba9c0, 0xc4201e8000, 0x7d00, 0x7d00, 0x7d00, 0x947ec0, 0x7f7d70000800, 0xe6dfa0) /usr/local/go/src/io/io.go:309 +0x86 io.ReadFull(0xe6dfa0, 0xc4201ba9c0, 0xc4201e8000, 0x7d00, 0x7d00, 0xc4201e1de0, 0x469fe0, 0xc4201c8780) /usr/local/go/src/io/io.go:327 +0x58 git.xxxxtech.com/xxxxcloud/dataprocessor.(*Dataprocessor).Read(0xc4201b9170, 0x0, 0x0, 0x0) /root/work/src/git.xxxxtech.com/xxxxcloud/dataprocessor/dprocessor.go:76 +0xc9 git.xxxxtech.com/xxxxcloud/dataprocessor.(*Dataprocessor).NewProducer.func1(0xc42001c7e0, 0xc4200e1820, 0xc4201b9170) /root/work/src/git.xxxxtech.com/xxxxcloud/dataprocessor/dprocessor.go:66 +0x76 created by git.xxxxtech.com/xxxxcloud/dataprocessor.(*Dataprocessor).NewProducer /root/work/src/git.xxxxtech.com/xxxxcloud/dataprocessor/dprocessor.go:45 +0xa0

goroutine 35 [select]: net/http.(*persistConn).readLoop(0xc4201505a0) /usr/local/go/src/net/http/transport.go:1654 +0x7a7 created by net/http.(*Transport).dialConn /usr/local/go/src/net/http/transport.go:1186 +0xa2e

goroutine 30 [select]: git.xxxxtech.com/xxxxcloud/rbuffer.NewEQ.func1(0xc420143360) /root/work/src/git.xxxxtech.com/xxxxcloud/rbuffer/eq.go:30 +0x444 created by git.xxxxtech.com/xxxxcloud/rbuffer.NewEQ /root/work/src/git.xxxxtech.com/xxxxcloud/rbuffer/eq.go:25 +0x157

goroutine 36 [select]: net/http.(*persistConn).writeLoop(0xc4201505a0) /usr/local/go/src/net/http/transport.go:1759 +0x165 created by net/http.(*Transport).dialConn /usr/local/go/src/net/http/transport.go:1187 +0xa53

rax 0x0 rbx 0x7f7dc2193000 rcx 0xffffffffffffffff rdx 0x6 rdi 0x10aa rsi 0x10be rbp 0x7f7dc0b56580 rsp 0x7f7da526eb58 r8 0x0 r9 0x7f7d8c00b250 r10 0x8 r11 0x206 r12 0x7f7dc0e0e64c r13 0x7f7dc0e0eaf0 r14 0x1 r15 0x0 rip 0x7f7dc0a02277 rflags 0x206 cs 0x33 fs 0x0 gs 0x0 [root@localhost main]#

I'd like to see a clean example of playing an audio file and during playback printing out the progress of the playback (as in how many seconds, samples have been played, or position, or any useful indicator really).

I can't seem to figure out a simple solution based on the existing samples and reading the libsox documentation is painful enough that it's prohibitive for me to contribute this go-sox code myself.

Hi! I got an error fatal error: unexpected signal during runtime execution [signal SIGSEGV: segmentation violation code=0x1 addr=0x7ff4e39978c0 pc=0x7ff4e39978c0] when I gave go-sox libarry non-audio file. When I send incorrect file for the fist time it returns "formats: no handler for file extension `jpg'" but for the second time it's crashed with error https://gist.github.com/akaroot/bd040d722bd2fd2bb5e42c80bb35243c#file-error-log

After fisrt incorrect file I can send audio files and averythind works, but on second image file I always got crashed.

Code example: https://gist.github.com/akaroot/bd040d722bd2fd2bb5e42c80bb35243c#file-main-go GO version: 1.9.4, 1.10 OS: Ubuntu 16.04 x64

Hi. After i'd tried this code to convert GSM to MP3, It was converted successfully but when i tried to play, there's no content. i cannot directly convert it to wav due to the error of the audio file: WAV:RIFF Header not found sox -t gsm -r 8000 -c 1 -e signed-integer 003533-dialer-Feb-01-2017-16-00-17-PM.WAV -t wav -e signed-integer 0017.wav

file 0017.wav 0017.wav: RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, mono 8000 Hz sample output. sox 0017.wav -n stat Samples read: 0 Length (seconds): 0.000000 Scaled by: 2147483647.0 Maximum amplitude: 0.000000 Minimum amplitude: 0.000000 Midline amplitude: 0.000000 Mean norm: -nan Mean amplitude: -nan RMS amplitude: -nan Maximum delta: 0.000000 Minimum delta: 0.000000 Mean delta: -0.000000 RMS delta: -0.000000 Rough frequency: -2147483648 Probably text, not sound

Hi, I tried played the second file while the first file was playing but failed, the second file can only be play when being triggered after the first file finished playing. Is there any solution for this?

Thanks so much!

Hello, I need to analyze rtp streams (pcmu, pcma) and I would like to use this package. I saw "OpenMemRead" use "C.sox_open_mem_read" with default nil encodinginfo_t and nil signalinfo_t parameters. Is there a way to read and exploit a pcm file or stream ? (There is no setter for fmt.cFormat). Thanks in advance.