feat(app): add internal components batch 4

internal/app/ffmpeg_media.go

@@ -0,0 +1,22 @@
+package app
+
+import (
+	"context"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+func ffmpegMediaCommand(ctx context.Context, executable string, args ...string) *exec.Cmd {
+	command := exec.CommandContext(ctx, executable, args...)
+	command.Env = make([]string, 0, len(os.Environ()))
+	for _, entry := range os.Environ() {
+		key, _, _ := strings.Cut(entry, "=")
+		switch strings.ToLower(key) {
+		case "http_proxy", "https_proxy", "all_proxy":
+			continue
+		}
+		command.Env = append(command.Env, entry)
+	}
+	return command
+}