/// <summary>
/// create by format name,e.g. "mp4" ".mp4"
/// </summary>
/// <param name="name"></param>
public OutFormat(string name)
{
unsafe
{
name = name.Trim().TrimStart('.');
if (!string.IsNullOrEmpty(name))
{
void * ofmtOpaque = null;
AVOutputFormat *oformat;
while ((oformat = ffmpeg.av_muxer_iterate(&ofmtOpaque)) != null)
{
OutFormat format = new OutFormat(oformat);
// e.g. format.Name == "mov,mp4,m4a,3gp,3g2,mj2"
string[] names = format.Name.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
foreach (var item in names)
{
if (item == name.ToLower())
{
pOutputFormat = oformat;
return;
}
}
}
}
throw new FFmpegException(ffmpeg.AVERROR_MUXER_NOT_FOUND);
}
}
/// <summary>
/// write to file.
/// <para><see cref="ffmpeg.avformat_alloc_output_context2(AVFormatContext**, AVOutputFormat*, string, string)"/></para>
/// <para><see cref="ffmpeg.avio_open(AVIOContext**, string, int)"/></para>
/// </summary>
/// <param name="file"></param>
/// <param name="oformat"></param>
/// <param name="options"></param>
public MediaWriter(string file, OutFormat oformat = null, MediaDictionary options = null)
{
fixed(AVFormatContext **ppFormatContext = &pFormatContext)
{
ffmpeg.avformat_alloc_output_context2(ppFormatContext, oformat, null, file).ThrowIfError();
}
base.Format = oformat ?? new OutFormat(pFormatContext->oformat);
if ((pFormatContext->oformat->flags & ffmpeg.AVFMT_NOFILE) == 0)
{
ffmpeg.avio_open2(&pFormatContext->pb, file, ffmpeg.AVIO_FLAG_WRITE, null, options).ThrowIfError();
}
}
public MediaWriter(Stream stream, OutFormat oformat, MediaDictionary options = null)
{
baseStream = stream;
avio_Alloc_Context_Read_Packet = ReadFunc;
avio_Alloc_Context_Write_Packet = WriteFunc;
avio_Alloc_Context_Seek = SeekFunc;
pFormatContext = ffmpeg.avformat_alloc_context();
pFormatContext->oformat = oformat;
base.Format = oformat;
if ((pFormatContext->oformat->flags & ffmpeg.AVFMT_NOFILE) == 0)
{
pFormatContext->pb = ffmpeg.avio_alloc_context((byte *)ffmpeg.av_malloc(bufferLength), bufferLength, 1, null,
avio_Alloc_Context_Read_Packet, avio_Alloc_Context_Write_Packet, avio_Alloc_Context_Seek);
}
}
public static MediaEncoder CreateAudioEncode(OutFormat Oformat, int channels, int sampleRate, long bitRate = 0, AVSampleFormat format = AVSampleFormat.AV_SAMPLE_FMT_NONE)
{
return(CreateAudioEncode(Oformat.AudioCodec, Oformat.Flags, (ulong)ffmpeg.av_get_default_channel_layout(channels), sampleRate, bitRate, format));
}
public static MediaEncoder CreateAudioEncode(OutFormat Oformat, ulong channelLayout, int sampleRate, long bitRate = 0, AVSampleFormat format = AVSampleFormat.AV_SAMPLE_FMT_NONE)
{
return(CreateAudioEncode(Oformat.AudioCodec, Oformat.Flags, channelLayout, sampleRate, bitRate, format));
}
public static MediaEncoder CreateVideoEncode(OutFormat oformat, int width, int height, int fps, long bitRate = 0, AVPixelFormat format = AVPixelFormat.AV_PIX_FMT_NONE)
{
return(CreateVideoEncode(oformat.VideoCodec, oformat.Flags, width, height, fps, bitRate, format));
}
/// <summary>
/// write to stream,default buffersize 4096
/// </summary>
/// <param name="stream"></param>
/// <param name="oformat"></param>
/// <param name="options"></param>
public MediaWriter(Stream stream, OutFormat oformat, MediaDictionary options = null)
: this(stream, 4096, oformat, options)
{
}
