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Merge pull request #110 from Feodoros/master

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Selecting streams with the -map option
This commit is contained in:
Malte Rosenbjerg 2021-08-12 00:04:20 +02:00 committed by GitHub
commit 2d9d527b1f
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 65 additions and 22 deletions
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7
FFMpegCore.Test/ArgumentBuilderTest.cs
View file

@ -231,6 +231,13 @@ public void Builder_BuildString_FrameOutputCount()
Assert.AreEqual("-i \"input.mp4\" -vframes 50 \"output.mp4\"", str);
}
[TestMethod]
public void Builder_BuildString_VideoStreamNumber()
{
var str = FFMpegArguments.FromFileInput("input.mp4").OutputToFile("output.mp4", false, opt => opt.SelectStream(1)).Arguments;
Assert.AreEqual("-i \"input.mp4\" -map 0:1 \"output.mp4\"", str);
}
[TestMethod]
public void Builder_BuildString_FrameRate()
{

19
FFMpegCore/FFMpeg/Arguments/MapStreamArgument.cs Normal file
View file

@ -0,0 +1,19 @@
namespace FFMpegCore.Arguments
{
/// <summary>
/// Represents choice of video stream
/// </summary>
public class MapStreamArgument : IArgument
{
private readonly int _inputFileIndex;
private readonly int _streamIndex;
public MapStreamArgument(int streamIndex, int inputFileIndex)
{
_inputFileIndex = inputFileIndex;
_streamIndex = streamIndex;
}
public string Text => $"-map {_inputFileIndex}:{_streamIndex}";
}
}

48
FFMpegCore/FFMpeg/FFMpeg.cs
View file

@ -20,15 +20,17 @@ public static class FFMpeg
/// <param name="output">Output video file path</param>
/// <param name="captureTime">Seek position where the thumbnail should be taken.</param>
/// <param name="size">Thumbnail size. If width or height equal 0, the other will be computed automatically.</param>
/// <param name="streamIndex">Selected video stream index.</param>
/// <param name="inputFileIndex">Input file index</param>
/// <returns>Bitmap with the requested snapshot.</returns>
public static bool Snapshot(string input, string output, Size? size = null, TimeSpan? captureTime = null)
public static bool Snapshot(string input, string output, Size? size = null, TimeSpan? captureTime = null, int? streamIndex = null, int inputFileIndex = 0)
{
if (Path.GetExtension(output) != FileExtension.Png)
output = Path.GetFileNameWithoutExtension(output) + FileExtension.Png;
var source = FFProbe.Analyse(input);
var (arguments, outputOptions) = BuildSnapshotArguments(input, source, size, captureTime);
var (arguments, outputOptions) = BuildSnapshotArguments(input, source, size, captureTime, streamIndex, inputFileIndex);
return arguments
.OutputToFile(output, true, outputOptions)
.ProcessSynchronously();
@ -40,15 +42,17 @@ public static bool Snapshot(string input, string output, Size? size = null, Time
/// <param name="output">Output video file path</param>
/// <param name="captureTime">Seek position where the thumbnail should be taken.</param>
/// <param name="size">Thumbnail size. If width or height equal 0, the other will be computed automatically.</param>
/// <param name="streamIndex">Selected video stream index.</param>
/// <param name="inputFileIndex">Input file index</param>
/// <returns>Bitmap with the requested snapshot.</returns>
public static async Task<bool> SnapshotAsync(string input, string output, Size? size = null, TimeSpan? captureTime = null)
public static async Task<bool> SnapshotAsync(string input, string output, Size? size = null, TimeSpan? captureTime = null, int? streamIndex = null, int inputFileIndex = 0)
{
if (Path.GetExtension(output) != FileExtension.Png)
output = Path.GetFileNameWithoutExtension(output) + FileExtension.Png;
var source = await FFProbe.AnalyseAsync(input);
var (arguments, outputOptions) = BuildSnapshotArguments(input, source, size, captureTime);
var (arguments, outputOptions) = BuildSnapshotArguments(input, source, size, captureTime, streamIndex, inputFileIndex);
return await arguments
.OutputToFile(output, true, outputOptions)
.ProcessAsynchronously();
@ -60,13 +64,15 @@ public static async Task<bool> SnapshotAsync(string input, string output, Size?
/// <param name="input">Source video file.</param>
/// <param name="captureTime">Seek position where the thumbnail should be taken.</param>
/// <param name="size">Thumbnail size. If width or height equal 0, the other will be computed automatically.</param>
/// <param name="streamIndex">Selected video stream index.</param>
/// <param name="inputFileIndex">Input file index</param>
/// <returns>Bitmap with the requested snapshot.</returns>
public static Bitmap Snapshot(string input, Size? size = null, TimeSpan? captureTime = null)
public static Bitmap Snapshot(string input, Size? size = null, TimeSpan? captureTime = null, int? streamIndex = null, int inputFileIndex = 0)
{
var source = FFProbe.Analyse(input);
var (arguments, outputOptions) = BuildSnapshotArguments(input, source, size, captureTime);
var (arguments, outputOptions) = BuildSnapshotArguments(input, source, size, captureTime, streamIndex, inputFileIndex);
using var ms = new MemoryStream();
arguments
.OutputToPipe(new StreamPipeSink(ms), options => outputOptions(options
.ForceFormat("rawvideo")))
@ -82,13 +88,15 @@ public static Bitmap Snapshot(string input, Size? size = null, TimeSpan? capture
/// <param name="input">Source video file.</param>
/// <param name="captureTime">Seek position where the thumbnail should be taken.</param>
/// <param name="size">Thumbnail size. If width or height equal 0, the other will be computed automatically.</param>
/// <param name="streamIndex">Selected video stream index.</param>
/// <param name="inputFileIndex">Input file index</param>
/// <returns>Bitmap with the requested snapshot.</returns>
public static async Task<Bitmap> SnapshotAsync(string input, Size? size = null, TimeSpan? captureTime = null)
public static async Task<Bitmap> SnapshotAsync(string input, Size? size = null, TimeSpan? captureTime = null, int? streamIndex = null, int inputFileIndex = 0)
{
var source = await FFProbe.AnalyseAsync(input);
var (arguments, outputOptions) = BuildSnapshotArguments(input, source, size, captureTime);
var (arguments, outputOptions) = BuildSnapshotArguments(input, source, size, captureTime, streamIndex, inputFileIndex);
using var ms = new MemoryStream();
await arguments
.OutputToPipe(new StreamPipeSink(ms), options => outputOptions(options
.ForceFormat("rawvideo")))
@ -98,15 +106,23 @@ await arguments
return new Bitmap(ms);
}
private static (FFMpegArguments, Action<FFMpegArgumentOptions> outputOptions) BuildSnapshotArguments(string input, IMediaAnalysis source, Size? size = null, TimeSpan? captureTime = null)
private static (FFMpegArguments, Action<FFMpegArgumentOptions> outputOptions) BuildSnapshotArguments(
string input,
IMediaAnalysis source,
Size? size = null,
TimeSpan? captureTime = null,
int? streamIndex = null,
int inputFileIndex = 0)
{
captureTime ??= TimeSpan.FromSeconds(source.Duration.TotalSeconds / 3);
size = PrepareSnapshotSize(source, size);
streamIndex = streamIndex == null ? 0 : source.VideoStreams.FirstOrDefault(videoStream => videoStream.Index == streamIndex).Index;
return (FFMpegArguments
.FromFileInput(input, false, options => options
.Seek(captureTime)),
.Seek(captureTime)),
options => options
.SelectStream((int)streamIndex, inputFileIndex)
.WithVideoCodec(VideoCodec.Png)
.WithFrameOutputCount(1)
.Resize(size));
@ -116,11 +132,11 @@ private static (FFMpegArguments, Action<FFMpegArgumentOptions> outputOptions) Bu
{
if (wantedSize == null || (wantedSize.Value.Height <= 0 && wantedSize.Value.Width <= 0) || source.PrimaryVideoStream == null)
return null;
var currentSize = new Size(source.PrimaryVideoStream.Width, source.PrimaryVideoStream.Height);
if (source.PrimaryVideoStream.Rotation == 90 || source.PrimaryVideoStream.Rotation == 180)
currentSize = new Size(source.PrimaryVideoStream.Height, source.PrimaryVideoStream.Width);
if (wantedSize.Value.Width != currentSize.Width || wantedSize.Value.Height != currentSize.Height)
{
if (wantedSize.Value.Width <= 0 && wantedSize.Value.Height > 0)

13
FFMpegCore/FFMpeg/FFMpegArgumentOptions.cs
View file

@ -8,7 +8,7 @@ namespace FFMpegCore
public class FFMpegArgumentOptions : FFMpegArgumentsBase
{
internal FFMpegArgumentOptions() { }
public FFMpegArgumentOptions WithAudioCodec(Codec audioCodec) => WithArgument(new AudioCodecArgument(audioCodec));
public FFMpegArgumentOptions WithAudioCodec(string audioCodec) => WithArgument(new AudioCodecArgument(audioCodec));
public FFMpegArgumentOptions WithAudioBitrate(AudioQuality audioQuality) => WithArgument(new AudioBitrateArgument(audioQuality));
@ -17,9 +17,9 @@ internal FFMpegArgumentOptions() { }
public FFMpegArgumentOptions WithVariableBitrate(int vbr) => WithArgument(new VariableBitRateArgument(vbr));
public FFMpegArgumentOptions Resize(int width, int height) => WithArgument(new SizeArgument(width, height));
public FFMpegArgumentOptions Resize(Size? size) => WithArgument(new SizeArgument(size));
public FFMpegArgumentOptions WithBitStreamFilter(Channel channel, Filter filter) => WithArgument(new BitStreamFilterArgument(channel, filter));
public FFMpegArgumentOptions WithConstantRateFactor(int crf) => WithArgument(new ConstantRateFactorArgument(crf));
public FFMpegArgumentOptions CopyChannel(Channel channel = Channel.Both) => WithArgument(new CopyArgument(channel));
@ -28,11 +28,11 @@ internal FFMpegArgumentOptions() { }
public FFMpegArgumentOptions WithFastStart() => WithArgument(new FaststartArgument());
public FFMpegArgumentOptions WithFrameOutputCount(int frames) => WithArgument(new FrameOutputCountArgument(frames));
public FFMpegArgumentOptions WithHardwareAcceleration(HardwareAccelerationDevice hardwareAccelerationDevice = HardwareAccelerationDevice.Auto) => WithArgument(new HardwareAccelerationArgument(hardwareAccelerationDevice));
public FFMpegArgumentOptions UsingShortest(bool shortest = true) => WithArgument(new ShortestArgument(shortest));
public FFMpegArgumentOptions UsingMultithreading(bool multithread) => WithArgument(new ThreadsArgument(multithread));
public FFMpegArgumentOptions UsingThreads(int threads) => WithArgument(new ThreadsArgument(threads));
public FFMpegArgumentOptions WithVideoCodec(Codec videoCodec) => WithArgument(new VideoCodecArgument(videoCodec));
public FFMpegArgumentOptions WithVideoCodec(string videoCodec) => WithArgument(new VideoCodecArgument(videoCodec));
public FFMpegArgumentOptions WithVideoBitrate(int bitrate) => WithArgument(new VideoBitrateArgument(bitrate));
@ -48,10 +48,11 @@ public FFMpegArgumentOptions WithVideoFilters(Action<VideoFilterOptions> videoFi
public FFMpegArgumentOptions WithSpeedPreset(Speed speed) => WithArgument(new SpeedPresetArgument(speed));
public FFMpegArgumentOptions WithStartNumber(int startNumber) => WithArgument(new StartNumberArgument(startNumber));
public FFMpegArgumentOptions WithCustomArgument(string argument) => WithArgument(new CustomArgument(argument));
public FFMpegArgumentOptions Seek(TimeSpan? seekTo) => WithArgument(new SeekArgument(seekTo));
public FFMpegArgumentOptions Loop(int times) => WithArgument(new LoopArgument(times));
public FFMpegArgumentOptions OverwriteExisting() => WithArgument(new OverwriteArgument());
public FFMpegArgumentOptions SelectStream(int streamIndex, int inputFileIndex = 0) => WithArgument(new MapStreamArgument(streamIndex, inputFileIndex));
public FFMpegArgumentOptions ForceFormat(ContainerFormat format) => WithArgument(new ForceFormatArgument(format));
public FFMpegArgumentOptions ForceFormat(string format) => WithArgument(new ForceFormatArgument(format));