/// <summary>
/// Handles the Media.PacketRead event writing the packet to the output context.
/// </summary>
/// <param name="sender">the media element that sent this event.</param>
/// <param name="e">The event arguments containing the packet data.</param>
private void OnMediaPacketRead(object sender, PacketReadEventArgs e)
{
lock (SyncLock)
{
const AVRounding RoundingMode = AVRounding.AV_ROUND_NEAR_INF | AVRounding.AV_ROUND_PASS_MINMAX;
if (HasClosed)
{
return;
}
if (!HasInitialized)
{
Initialize(e.InputContext);
}
var inputStreamIndex = e.Packet->stream_index;
var outputStreamIndex = StreamMappings[inputStreamIndex];
var inputTimeBase = e.InputContext->streams[inputStreamIndex]->time_base;
var outputTimeBase = OutputContext->streams[outputStreamIndex]->time_base;
var packet = ffmpeg.av_packet_clone(e.Packet);
packet->stream_index = outputStreamIndex;
packet->pos = -1;
packet->pts = ffmpeg.av_rescale_q_rnd(packet->pts, inputTimeBase, outputTimeBase, RoundingMode);
packet->dts = ffmpeg.av_rescale_q_rnd(packet->dts, inputTimeBase, outputTimeBase, RoundingMode);
packet->duration = ffmpeg.av_rescale_q(packet->duration, inputTimeBase, outputTimeBase);
ffmpeg.av_interleaved_write_frame(OutputContext, packet);
ffmpeg.av_packet_unref(packet);
}
}
public unsafe Remuxing(string inputFile)
{
string outputFile = Path.GetFileNameWithoutExtension(inputFile) + "_remuxing" + Path.GetExtension(inputFile);
using (MediaReader reader = new MediaReader(inputFile))
using (MediaWriter writer = new MediaWriter(outputFile))
{
// add stream with reader's codec_id
for (int i = 0; i < reader.Count; i++)
{
writer.AddStream(reader[i], writer.Format.Flags);
}
writer.Initialize();
// read and write packet
foreach (var packet in reader.ReadPacket())
{
int index = packet.StreamIndex;
AVRounding rounding = AVRounding.AV_ROUND_NEAR_INF | AVRounding.AV_ROUND_PASS_MINMAX;
AVRational inTimeBase = reader[index].TimeBase;
AVRational outTimeBase = writer[index].TimeBase;
packet.Pts = ffmpeg.av_rescale_q_rnd(packet.Pts, inTimeBase, outTimeBase, rounding);
packet.Dts = ffmpeg.av_rescale_q_rnd(packet.Dts, inTimeBase, outTimeBase, rounding);
packet.Duration = ffmpeg.av_rescale_q(packet.Duration, inTimeBase, outTimeBase);
packet.Pos = -1;
writer.WritePacket(packet);
}
writer.FlushMuxer();
}
}
public static extern System.Int64 av_rescale_rnd( [MarshalAs(UnmanagedType.I8)] System.Int64 a, [MarshalAs(UnmanagedType.I8)] System.Int64 b, [MarshalAs(UnmanagedType.I8)] System.Int64 c, AVRounding __arg3);
public static extern System.Int64 av_rescale_rnd(
[MarshalAs(UnmanagedType.I8)]
System.Int64 a,
[MarshalAs(UnmanagedType.I8)]
System.Int64 b,
[MarshalAs(UnmanagedType.I8)]
System.Int64 c,
AVRounding __arg3);
public static extern long av_rescale_rnd(long a, long b, long c, AVRounding rnd);
public static extern long av_rescale_q_rnd(long a, AVRational bq, AVRational cq, AVRounding p3);
public static extern long av_rescale_rnd(long a, long b, long c, AVRounding rnd);
public static extern long av_rescale_q_rnd(long a, AVRational bq, AVRational cq, AVRounding rnd);
public static extern System.Int64 av_rescale_q_rnd( [MarshalAs(UnmanagedType.I8)] System.Int64 a, AVRational bq, AVRational cq, AVRounding __arg3);
public static extern System.Int64 av_rescale_q_rnd(
[MarshalAs(UnmanagedType.I8)]
System.Int64 a,
AVRational bq,
AVRational cq,
AVRounding __arg3);
