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Style guide fixes and minor refactoring

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This commit is contained in:
Fedor Zhilkin 2021-08-03 21:58:40 +03:00
parent 37109bab34
commit c30cf4c7ad
1 changed files with 15 additions and 9 deletions
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24
FFMpegCore/FFMpeg/FFMpeg.cs
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@ -20,14 +20,15 @@ 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>
/// <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 = 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);
return arguments
.OutputToFile(output, true, outputOptions)
@ -40,14 +41,15 @@ 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>
/// <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 = 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);
return await arguments
.OutputToFile(output, true, outputOptions)
@ -60,11 +62,12 @@ 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>
/// <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 = 0)
{
var source = FFProbe.Analyse(input);
var (arguments, outputOptions) = BuildSnapshotArguments(input, source, size, captureTime);
var (arguments, outputOptions) = BuildSnapshotArguments(input, source, size, captureTime, streamIndex);
using var ms = new MemoryStream();
arguments
@ -82,11 +85,12 @@ 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>
/// <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 = 0)
{
var source = await FFProbe.AnalyseAsync(input);
var (arguments, outputOptions) = BuildSnapshotArguments(input, source, size, captureTime);
var (arguments, outputOptions) = BuildSnapshotArguments(input, source, size, captureTime, streamIndex);
using var ms = new MemoryStream();
await arguments
@ -98,15 +102,17 @@ 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 = 0)
{
captureTime ??= TimeSpan.FromSeconds(source.Duration.TotalSeconds / 3);
size = PrepareSnapshotSize(source, size);
var index = source.VideoStreams.FirstOrDefault(videoStream => videoStream.Index == streamIndex)?.Index;
return (FFMpegArguments
.FromFileInput(input, false, options => options
.Seek(captureTime)),
options => options
.SelectStream(index ?? 0)
.WithVideoCodec(VideoCodec.Png)
.WithFrameOutputCount(1)
.Resize(size));