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C#利用ffmpeg借助NVIDIA GPU实现实时RTSP硬解码+硬编码录制MP4

news 2025/7/15 10:26:18

说明

效果

项目

代码

下载

说明

利用周杰的开源项目 Sdcb.FFmpeg

项目地址：https://github.com/sdcb/Sdcb.FFmpeg/

代码实现参考：https://github.com/sdcb/ffmpeg-muxing-video-demo

效果

C#利用ffmpeg借助NVIDIA GPU实现实时RTSP硬解码+硬编码录制MP4

项目

代码

using Sdcb.FFmpeg.Codecs;
using Sdcb.FFmpeg.Formats;
using Sdcb.FFmpeg.Raw;
using Sdcb.FFmpeg.Toolboxs.Extensions;
using System;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Sdcb.FFmpegDemo
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

CancellationTokenSource cts;

/// <summary>
/// 播放
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button1_Click(object sender, EventArgs e)
{
button1.Enabled = false;
button2.Enabled = true;
cts = new CancellationTokenSource();
string rtsp_url = txtURL.Text;
//输出视频文件的名称。
string outputFile = "output.mp4";
Task.Run(() => Recording(rtsp_url, outputFile, cts.Token));
}

void Recording(string url, string outputFile, CancellationToken cancellationToken)
{
//输出视频的帧率,帧率设置为每秒25帧
AVRational frameRate = new AVRational(25, 1);

//输出视频的比特率。
long bitRate = 16 * 1024 * 1024; // 16M

//从文件夹读取
//该字符串指定了源图像的文件夹和命名模式。%03d部分表示图像以三位数字命名（例如，001.jpg，002.jpg等）。
//string sourceFolder = @".\src\%03d.jpg";
//FormatContext srcFc = FormatContext.OpenInputUrl(sourceFolder, options: new MediaDictionary
//{
// ["framerate"] = frameRate.ToString()
//});

FormatContext srcFc = FormatContext.OpenInputUrl(url);
srcFc.LoadStreamInfo();
MediaStream srcVideo = srcFc.GetVideoStream();
CodecParameters srcCodecParameters = srcVideo.Codecpar;

CodecContext videoDecoder = new CodecContext(Codec.FindDecoderByName("h264_cuvid"));
{
};
videoDecoder.FillParameters(srcCodecParameters);
videoDecoder.Open();

//var d= Codec.FindDecoders(AVCodecID.H264).Select(x => x.Name);
//var e = Codec.FindEncoders(AVCodecID.H264).Select(x => x.Name);

FormatContext dstFc = FormatContext.AllocOutput(OutputFormat.Guess("mp4"));

dstFc.VideoCodec = Codec.FindEncoderByName("h264_nvenc");
MediaStream vstream = dstFc.NewStream(dstFc.VideoCodec);

CodecContext vcodec = new CodecContext(dstFc.VideoCodec)
{
Width = srcCodecParameters.Width,
Height = srcCodecParameters.Height,
TimeBase = frameRate.Inverse(),
PixelFormat = AVPixelFormat.Yuv420p,
Flags = AV_CODEC_FLAG.GlobalHeader,
BitRate = bitRate,
};
vcodec.Open(dstFc.VideoCodec);
vstream.Codecpar.CopyFrom(vcodec);
vstream.TimeBase = vcodec.TimeBase;

IOContext io = IOContext.OpenWrite(outputFile);
dstFc.Pb = io;
dstFc.WriteHeader();

// src -- srcFc.ReadPackets() -->
// src Packet -- DecodePackets(videoDecoder) -->
// src Frame -- ConvertFrames(vcodec) -->
// dst Frame -- EncodeFrames(vcodec) -->
// dst Packet -- dstFc.InterleavedWritePacket -->
// dst

foreach (Packet packet in srcFc
.ReadPackets().Where(x => x.StreamIndex == srcVideo.Index)
.DecodePackets(videoDecoder)
.ConvertFrames(vcodec)
.EncodeFrames(vcodec)
)
{
try
{
packet.RescaleTimestamp(vcodec.TimeBase, vstream.TimeBase);
packet.StreamIndex = vstream.Index;
dstFc.InterleavedWritePacket(packet);

if (cancellationToken.IsCancellationRequested) break;
}
finally
{
packet.Unref();
}
}
dstFc.WriteTrailer();

io.Dispose();
vcodec.Dispose();
dstFc.Dispose();
videoDecoder.Dispose();
srcFc.Dispose();

}

/// <summary>
/// 停止
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button2_Click(object sender, EventArgs e)
{
button2.Enabled = false;
button1.Enabled = true;
cts.Cancel();
}

private void Form1_Load(object sender, EventArgs e)
{
button2.Enabled = false;
button1.Enabled = true;
Sdcb.FFmpeg.Utils.FFmpegLogger.LogWriter = (level, msg) => Console.WriteLine(msg);
}
}

}

using Sdcb.FFmpeg.Codecs;
using Sdcb.FFmpeg.Formats;
using Sdcb.FFmpeg.Raw;
using Sdcb.FFmpeg.Toolboxs.Extensions;
using System;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;namespace Sdcb.FFmpegDemo
{public partial class Form1 : Form{public Form1(){InitializeComponent();}CancellationTokenSource cts;/// <summary>/// 播放/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button1_Click(object sender, EventArgs e){button1.Enabled = false;button2.Enabled = true;cts = new CancellationTokenSource();string rtsp_url = txtURL.Text;//输出视频文件的名称。string outputFile = "output.mp4";Task.Run(() => Recording(rtsp_url, outputFile, cts.Token));}void Recording(string url, string outputFile, CancellationToken cancellationToken){//输出视频的帧率,帧率设置为每秒25帧AVRational frameRate = new AVRational(25, 1);//输出视频的比特率。long bitRate = 16 * 1024 * 1024; // 16M//从文件夹读取//该字符串指定了源图像的文件夹和命名模式。%03d部分表示图像以三位数字命名（例如，001.jpg，002.jpg等）。//string sourceFolder = @".\src\%03d.jpg";//FormatContext srcFc = FormatContext.OpenInputUrl(sourceFolder, options: new MediaDictionary//{//    ["framerate"] = frameRate.ToString()//});FormatContext srcFc = FormatContext.OpenInputUrl(url);srcFc.LoadStreamInfo();MediaStream srcVideo = srcFc.GetVideoStream();CodecParameters srcCodecParameters = srcVideo.Codecpar;CodecContext videoDecoder = new CodecContext(Codec.FindDecoderByName("h264_cuvid"));{};videoDecoder.FillParameters(srcCodecParameters);videoDecoder.Open();//var d=  Codec.FindDecoders(AVCodecID.H264).Select(x => x.Name);//var e = Codec.FindEncoders(AVCodecID.H264).Select(x => x.Name);FormatContext dstFc = FormatContext.AllocOutput(OutputFormat.Guess("mp4"));dstFc.VideoCodec = Codec.FindEncoderByName("h264_nvenc");MediaStream vstream = dstFc.NewStream(dstFc.VideoCodec);CodecContext vcodec = new CodecContext(dstFc.VideoCodec){Width = srcCodecParameters.Width,Height = srcCodecParameters.Height,TimeBase = frameRate.Inverse(),PixelFormat = AVPixelFormat.Yuv420p,Flags = AV_CODEC_FLAG.GlobalHeader,BitRate = bitRate,};vcodec.Open(dstFc.VideoCodec);vstream.Codecpar.CopyFrom(vcodec);vstream.TimeBase = vcodec.TimeBase;IOContext io = IOContext.OpenWrite(outputFile);dstFc.Pb = io;dstFc.WriteHeader();// src        -- srcFc.ReadPackets()          -->// src Packet -- DecodePackets(videoDecoder)  -->// src Frame  -- ConvertFrames(vcodec)        -->// dst Frame  -- EncodeFrames(vcodec)         -->// dst Packet -- dstFc.InterleavedWritePacket -->// dstforeach (Packet packet in srcFc.ReadPackets().Where(x => x.StreamIndex == srcVideo.Index).DecodePackets(videoDecoder).ConvertFrames(vcodec).EncodeFrames(vcodec)){try{packet.RescaleTimestamp(vcodec.TimeBase, vstream.TimeBase);packet.StreamIndex = vstream.Index;dstFc.InterleavedWritePacket(packet);if (cancellationToken.IsCancellationRequested) break;}finally{packet.Unref();}}dstFc.WriteTrailer();io.Dispose();vcodec.Dispose();dstFc.Dispose();videoDecoder.Dispose();srcFc.Dispose();}/// <summary>/// 停止/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button2_Click(object sender, EventArgs e){button2.Enabled = false;button1.Enabled = true;cts.Cancel();}private void Form1_Load(object sender, EventArgs e){button2.Enabled = false;button1.Enabled = true;Sdcb.FFmpeg.Utils.FFmpegLogger.LogWriter = (level, msg) => Console.WriteLine(msg);}}}