internal AvDictionary ToOptions()
{
// CBR mode = -b:a
// VBR
// Constant Bitrate
// -b:a
var options = new AvDictionary();
if (BitRate != null)
{
// Activate CBR mode
// defaults to 128kbs
options.Set("b", BitRate.Value.Value); // in bits per second
// setting this activated the bitrate mode
}
else if (Quality != null)
{
// options.Set("q", (int)Quality.Value);
}
if (CutoffFrequency != null)
{
// If unspecified will allow the encoder to dynamically adjust the cutoff to improve clarity on low bitrates.
options.Set("cutoff", CutoffFrequency.Value);
}
if (Coder != null)
{
options.Set("aac_coder", Coder.ToString().ToLower());
}
// aac_ms
// aac_is
// aac_pns
// aac_tns
// aac_ltp
// aac_pred
switch (Profile)
{
case AacProfile.LC: options.Set("profile", "aac_low"); break;
case AacProfile.LTP: options.Set("profile", "aac_ltp"); break;
case AacProfile.Main: options.Set("profile", "aac_main"); break;
}
return(options);
}
public virtual void WriteHeader(AvDictionary options = null)
{
if (options != null)
{
fixed(AVDictionary **p = &options.Pointer)
{
ffmpeg.avformat_write_header(Context.Pointer, options: p).EnsureSuccess();
}
}
else
{
ffmpeg.avformat_write_header(Context.Pointer, options: null).EnsureSuccess();
}
}
internal AvDictionary ToOptions()
{
// CBR mode = -b:a
// VBR
// Constant Bitrate
// -b:a
var options = new AvDictionary();
// options.Set("codec", "libmp3lame");
if (BitRate != null)
{
// Activate CBR mode
// defaults to 128kbs
options.Set("b", BitRate.Value.Value); // in bits per second
// setting this activated the bitrate mode
}
return(options);
}
