/// <summary>
/// Add stream by copy <see cref="ffmpeg.avcodec_parameters_copy(AVCodecParameters*, AVCodecParameters*)"/>,
/// </summary>
/// <param name="stream"></param>
/// <param name="flags"></param>
/// <returns></returns>
public MediaStream AddStream(MediaStream stream, int flags = 0)
{
AVStream *pstream = ffmpeg.avformat_new_stream(pFormatContext, null);
pstream->id = (int)(pFormatContext->nb_streams - 1);
ffmpeg.avcodec_parameters_copy(pstream->codecpar, stream.Stream.codecpar);
pstream->codecpar->codec_tag = 0;
MediaCodec mediaCodec = null;
if (stream.Codec != null)
{
mediaCodec = MediaEncode.CreateEncode(stream.Codec.AVCodecContext.codec_id, flags, _ =>
{
AVCodecContext *pContext = _;
AVCodecParameters *pParameters = ffmpeg.avcodec_parameters_alloc();
ffmpeg.avcodec_parameters_from_context(pParameters, stream.Codec).ThrowExceptionIfError();
ffmpeg.avcodec_parameters_to_context(pContext, pParameters);
ffmpeg.avcodec_parameters_free(&pParameters);
pContext->time_base = stream.Stream.r_frame_rate.ToInvert();
});
}
streams.Add(new MediaStream(pstream)
{
TimeBase = stream.Stream.r_frame_rate.ToInvert(), Codec = mediaCodec
});
return(streams.Last());
}
public static MediaEncode CreateEncode(string codecName, int flags, Action <MediaCodec> setBeforeOpen = null, MediaDictionary opts = null)
{
MediaEncode encode = new MediaEncode(codecName);
encode.Initialize(setBeforeOpen, flags, opts);
return(encode);
}
/// <summary>
/// Add stream by encode
/// </summary>
/// <param name="encode">Used to codec stream.
/// set null to add a data stream but no encoder,
/// then use <see cref="WritePacket(MediaPacket)"/> write data directly.
/// </param>
/// <returns></returns>
public MediaStream AddStream(MediaEncode encode)
{
AVStream *stream = ffmpeg.avformat_new_stream(pFormatContext, null);
stream->id = (int)(pFormatContext->nb_streams - 1);
// keep the order
if (encode != null)
{
ffmpeg.avcodec_parameters_from_context(stream->codecpar, encode);
stream->time_base = encode.AVCodecContext.time_base;
}
streams.Add(new MediaStream(stream)
{
Codec = encode
});
return(streams.Last());
}
