Implemented limiting CPU threads

Author: mikigal

README.MD

@@ -70,6 +70,7 @@ Follow these steps to use the Anime4K-GUI:
    - Constant Rate Factor (CRF) - CRF is a method for controlling the output file's bitrate. The lower the value, the better the quality, but the larger the output file. The range is between 0 and 51. I recommend a value around 20.
    - Output format: Format for the output file. Pick MP4 for best support on most devices, MKV for the best compatibility with more complicated files (e.g. multiple streams). <br>
      **If Input files contain subtitles streams you must use MKV as output format due to other MK4/AVI limitations**
+   - CPU threads: How many of CPU threads FFMPEG will use. You may limit it to make your system more responsive wile using CPU based encoder
    - Compatibility mode: check it only if you have compatibility issues.
    - Debug mode: show more detailed logs, useful for troubleshooting and debugging
 

ffmpeg.go

@@ -4,6 +4,7 @@ import (
 	"bufio"
 	"fmt"
 	"io"
+	"runtime"
 	"slices"
 	"strconv"
 	"strings"
@@ -129,6 +130,16 @@ func buildUpscalingParams(anime Anime, resolution Resolution, shader Shader, out
 		}
 	}
 
+	if videoCodec == "libx264" && settings.CpuThreads != int32(runtime.NumCPU()) {
+		params = append(params, "-threads", fmt.Sprintf("%d", settings.CpuThreads))
+	}
+	if videoCodec == "libx265" && settings.CpuThreads != int32(runtime.NumCPU()) {
+		params = append(params, "-x265-params", fmt.Sprintf("pools=%d", min(settings.CpuThreads, 16))) // libx265 allow max 16 threads
+	}
+	if videoCodec == "libsvtav1" && settings.CpuThreads != int32(runtime.NumCPU()) {
+		params = append(params, "-svtav1-params", fmt.Sprintf("pin=%d", settings.CpuThreads))
+	}
+
 	params = append(params, outputPath)
 	return params
 }

gui.go

@@ -3,6 +3,7 @@ package main
 import (
 	"context"
 	"fmt"
+	"runtime"
 	"time"
 
 	g "github.com/AllenDang/giu"
@@ -12,11 +13,12 @@ import (
 const dragDropLabel = "\n\n\n\n\n\n\n                                              Drag n' Drop your anime here"
 const shadersTooltip = "Check the project's GitHub page if you're not sure what to choose"
 const encoderTooltip = "Codec for encoding output file. In most cases GPU based are faster, use CPU mainly if you have slow GPU\n" +
-	"GPU based AV1 is compatible only with RTX 4000+ and RX 6500XT+\n" +
+	"GPU based AV1 is compatible only with RTX 4000+ and RX 7000+\n" +
 	"HDR videos are supported only by AV1 codec"
 const crfTooltip = "Constant Rate Factor parameter encoder. \nDon't set it too high - file will be very big. " +
 	"\n\nCorrect values: 0 - 51 \nIf you don't know what to enter, leave it as 20"
 const outputFormatTooltip = "If your input file contains subtitles streams you must use MKV as output format due to other formats limitations"
+const cpuThreadsTooltip = "How many of CPU threads FFMPEG will use \nYou may limit it to make your system more responsive wile using CPU based encoder"
 const compatibilityModeTooltip = "Should be used only for compatibility troubleshooting, disables most of features"
 const debugModeTooltip = "Show more detailed logs, useful for troubleshooting and debugging"
 
@@ -80,6 +82,12 @@ func loop(window *g.MasterWindow) {
 					g.Tooltip(outputFormatTooltip),
 					g.Label(""),
 
+					g.Label("CPU threads"),
+					g.Tooltip(cpuThreadsTooltip),
+					g.InputInt(&settings.CpuThreads).Size(400).OnChange(func() { handleMinMax(&settings.CpuThreads, 1, 1, int32(runtime.NumCPU()), int32(runtime.NumCPU())) }),
+					g.Tooltip(cpuThreadsTooltip),
+					g.Label(""),
+
 					g.Checkbox("Compatibility mode", &settings.CompatibilityMode),
 					g.Tooltip(compatibilityModeTooltip),
 

main.go

@@ -6,6 +6,7 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"runtime"
 	"strings"
 	"syscall"
 
@@ -65,6 +66,7 @@ var (
 		Encoder:           0,
 		Crf:               20,
 		OutputFormat:      2,
+		CpuThreads:        int32(runtime.NumCPU()),
 		CompatibilityMode: false,
 		DebugMode:         false,
 		Version:           version,

resources/screenshot.png

@@ -14,6 +14,7 @@ type Settings struct {
 	Encoder           int32  `json:"encoder"`
 	Crf               int32  `json:"crf"`
 	OutputFormat      int32  `json:"output_format"`
+	CpuThreads        int32  `json:"cpu_threads"`
 	CompatibilityMode bool   `json:"compatibility_mode"`
 	DebugMode         bool   `json:"debug_mode"`
 	Version           string `json:"version"`