attempt using aria2c for some servers

ip_manager/throttle.go

@@ -2,6 +2,7 @@ package ip_manager
 
 import (
 	"net"
+	"os"
 	"sort"
 	"sync"
 	"time"
@@ -45,7 +46,8 @@ func GetIPPool(stopGrp *stop.Group) (*IPPool, error) {
 	var pool []throttledIP
 	for _, address := range addrs {
 		if ipnet, ok := address.(*net.IPNet); ok && ipnet.IP.IsGlobalUnicast() {
-			if ipnet.IP.To16() != nil && govalidator.IsIPv6(ipnet.IP.String()) {
+			ipv6Disabled := os.Getenv("DISABLE_IPV6") != ""
+			if ipnet.IP.To16() != nil && govalidator.IsIPv6(ipnet.IP.String()) && !ipv6Disabled {
 				pool = append(pool, throttledIP{
 					IP:      ipnet.IP.String(),
 					LastUse: time.Now().Add(-5 * time.Minute),

sources/youtubeVideo.go

@@ -279,7 +279,15 @@ func (v *YoutubeVideo) download() error {
 		"--load-info-json",
 		metadataPath,
 	}
-
+	ipv6Disabled := os.Getenv("DISABLE_IPV6") != ""
+	if ipv6Disabled {
+		ytdlArgs = append(ytdlArgs,
+			"--external-downloader",
+			"aria2c",
+			"--external-downloader-args",
+			"aria2c:-j 16 -x 16 -s 16 -k 1M",
+		)
+	}
 	userAgent := []string{"--user-agent", downloader.ChromeUA}
 	if v.maxVideoSize > 0 {
 		ytdlArgs = append(ytdlArgs,