func GuessOutputFromMimeType(mimeType string) *Output {
cMimeType := C.CString(mimeType)
defer C.free(unsafe.Pointer(cMimeType))
cOutput := C.av_guess_format(nil, nil, cMimeType)
if cOutput == nil {
return nil
}
return NewOutputFromC(unsafe.Pointer(cOutput))
}
func GuessOutputFromFileName(fileName string) *Output {
cFileName := C.CString(fileName)
defer C.free(unsafe.Pointer(cFileName))
cOutput := C.av_guess_format(nil, cFileName, nil)
if cOutput == nil {
return nil
}
return NewOutputFromC(unsafe.Pointer(cOutput))
}
func GuessOutputFromShortName(shortName string) *Output {
cShortName := C.CString(shortName)
defer C.free(unsafe.Pointer(cShortName))
cOutput := C.av_guess_format(cShortName, nil, nil)
if cOutput == nil {
return nil
}
return NewOutputFromC(unsafe.Pointer(cOutput))
}
func av_guess_format(format, filename string) OutputFormat {
result := OutputFormat{}
cfilename := C.CString(filename)
cformat := C.CString(format)
defer C.free(unsafe.Pointer(cfilename))
defer C.free(unsafe.Pointer(cformat))
fmt := C.av_guess_format(cformat, cfilename, nil)
result.format = fmt
return result
}
func FindOutputFmt(format string, filename string, mime string) *OutputFmt {
cformat := C.CString(format)
defer C.free(unsafe.Pointer(cformat))
cfilename := C.CString(filename)
defer C.free(unsafe.Pointer(cfilename))
cmime := C.CString(mime)
defer C.free(unsafe.Pointer(cmime))
var ofmt *C.AVOutputFormat
if ofmt = C.av_guess_format(cformat, nil, cmime); ofmt == nil {
ofmt = C.av_guess_format(nil, cfilename, cmime)
}
if ofmt == nil {
return nil
}
return &OutputFmt{Filename: filename, avOutputFmt: ofmt}
}
func NewMuxer(source *MediaSource, format, uri string) (*Muxer, error) {
m := Muxer{done: make(chan bool), recl: make([]reclaimer, 0, 8)}
m.context = C.avformat_alloc_context()
if m.context == (*C.AVFormatContext)(null) {
return nil, fmt.Errorf("allocate output format context failed")
}
m.recl = append(m.recl, func() {
C.avformat_free_context(m.context)
})
var f *C.char = C.CString(format)
var u *C.char = C.CString(uri)
defer C.free(unsafe.Pointer(f))
defer C.free(unsafe.Pointer(u))
m.context.oformat = C.av_guess_format(f, u, (*C.char)(null))
if m.context.oformat == (*C.AVOutputFormat)(null) {
return nil, fmt.Errorf("output format not supported")
}
C.av_strlcpy(&m.context.filename[0], u, C.size_t(unsafe.Sizeof(m.context.filename)))
var err error
if m.capture, err = NewCapture(source.Video.driver, source.Video.device); err != nil {
return nil, err
}
return &m, nil
}
//Return the output format in the list of registered output formats which best matches the provided parameters, or return NULL if there is no match.
func AvGuessFormat(sn, f, mt string) *OutputFormat {
return (*OutputFormat)(C.av_guess_format(C.CString(sn), C.CString(f), C.CString(mt)))
}