panic: runtime error: index out of range [0] with length 0

when I try the new version, it panic directly. here is log:

[GIN] 2021/04/09 - 10:28:52 | 200 |     160.161µs |       127.0.0.1 | GET      "/static/js/app.js?ver=2021-04-09%2010%3a28%3a52.597377948%20%2b0800%20CST%20m%3d%2b54.595446870"
2021/04/09 10:28:52 Stream Try Connect MICRO


2021/04/09 10:28:53 [Recovery] 2021/04/09 - 10:28:53 panic recovered:
GET /stream/codec/MICRO HTTP/1.1
Host: localhost:8083
Accept: */*
Accept-Encoding: gzip, deflate, br
Accept-Language: zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7
Connection: keep-alive
Cookie: SL_G_WPT_TO=zh-CN; SL_GWPT_Show_Hide_tmp=undefined; SL_wptGlobTipTmp=undefined
Referer: http://localhost:8083/stream/player/MICRO
Sec-Ch-Ua: "Google Chrome";v="89", "Chromium";v="89", ";Not A Brand";v="99"
Sec-Ch-Ua-Mobile: ?0
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: same-origin
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36
X-Requested-With: XMLHttpRequest


runtime error: index out of range [0] with length 0
/home/lee/go/src/runtime/panic.go:88 (0x434fe4)
        goPanicIndex: panic(boundsError{x: int64(x), signed: true, y: y, code: boundsIndex})
/home/lee/gowork/pkg/mod/github.com/deepch/vdk@v0.0.0-20210218105644-f6de3acad035/codec/h264parser/parser.go:516 (0xae3fb9)
        CodecData.SPS: return self.RecordInfo.SPS[0]
/home/lee/test/RTSPtoWebRTC/config.go:156 (0xae3cf6)
        (*ConfigST).coGe: if codecVideo.SPS() != nil && codecVideo.PPS() != nil && len(codecVideo.SPS()) > 0 && len(codecVideo.PPS()) > 0 {
/home/lee/test/RTSPtoWebRTC/http.go:67 (0xae5314)
        HTTPAPIServerStreamCodec: codecs := Config.coGe(c.Param("uuid"))
/home/lee/gowork/pkg/mod/github.com/gin-gonic/gin@v1.6.3/context.go:161 (0xabcc9a)
        (*Context).Next: c.handlers[c.index](c)
/home/lee/gowork/pkg/mod/github.com/gin-gonic/gin@v1.6.3/recovery.go:83 (0xad0c84)
        RecoveryWithWriter.func1: c.Next()
/home/lee/gowork/pkg/mod/github.com/gin-gonic/gin@v1.6.3/context.go:161 (0xabcc9a)
        (*Context).Next: c.handlers[c.index](c)
/home/lee/gowork/pkg/mod/github.com/gin-gonic/gin@v1.6.3/logger.go:241 (0xacfd84)
        LoggerWithConfig.func1: c.Next()
/home/lee/gowork/pkg/mod/github.com/gin-gonic/gin@v1.6.3/context.go:161 (0xabcc9a)
        (*Context).Next: c.handlers[c.index](c)
/home/lee/gowork/pkg/mod/github.com/gin-gonic/gin@v1.6.3/gin.go:409 (0xac6fd9)
        (*Engine).handleHTTPRequest: c.Next()
/home/lee/gowork/pkg/mod/github.com/gin-gonic/gin@v1.6.3/gin.go:367 (0xac66cc)
        (*Engine).ServeHTTP: engine.handleHTTPRequest(c)
/home/lee/go/src/net/http/server.go:2843 (0x6ef582)
        serverHandler.ServeHTTP: handler.ServeHTTP(rw, req)
/home/lee/go/src/net/http/server.go:1925 (0x6eac8c)
        (*conn).serve: serverHandler{c.server}.ServeHTTP(w, w.req)
/home/lee/go/src/runtime/asm_amd64.s:1374 (0x46cee0)
        goexit: BYTE    $0x90   // NOP

[GIN] 2021/04/09 - 10:28:53 | 500 |   51.389447ms |       127.0.0.1 | GET      "/stream/codec/MICRO"
2021/04/09 10:28:53 RTSP Signal
2021/04/09 10:28:53 Stream Exit Rtsp Disconnect
2021/04/09 10:28:53 Stream Exit On Demand No Viewer
panic: runtime error: index out of range [0] with length 0

goroutine 198 [running]:
github.com/deepch/vdk/format/rtspv2.(*RTSPClient).RTPDemuxer(0xc00000c780, 0xc00000ef40, 0xc0001fa144, 0x40, 0x40, 0x40)
        /home/lee/gowork/pkg/mod/github.com/deepch/vdk@v0.0.0-20210218105644-f6de3acad035/format/rtspv2/client.go:607 +0x2a66
github.com/deepch/vdk/format/rtspv2.(*RTSPClient).startStream(0xc00000c780)
        /home/lee/gowork/pkg/mod/github.com/deepch/vdk@v0.0.0-20210218105644-f6de3acad035/format/rtspv2/client.go:290 +0x678
created by github.com/deepch/vdk/format/rtspv2.Dial
        /home/lee/gowork/pkg/mod/github.com/deepch/vdk@v0.0.0-20210218105644-f6de3acad035/format/rtspv2/client.go:220 +0x79d

Process finished with exit code 2

it seems should check the length of nal byte array from the code line “for _, nal := range nalRaw {”

[yourchanges]

Modify the config.go line 186

if len(codecVideo.RecordInfo.SPS) > 0 && len(codecVideo.RecordInfo.PPS) > 0 && codecVideo.SPS() != nil && codecVideo.PPS() != nil && len(codecVideo.SPS()) > 0 && len(codecVideo.PPS()) > 0 {
					

to fix it.

[FourLeafTec]

@deepch Sorry, i need to close test stream for a several days. If you need the stream to test, just call me.